A Tupolev Tu-134, similar to the aircraft that was involved in the accident |
|
| Accident summary | |
|---|---|
| Date | October 19, 1986 |
| Type | Controlled flight into terrain |
| Site | Mbuzini, Lebombo Mountains, South Africa |
| Passengers | 35[1] |
| Crew | 9[1] |
| Fatalities | 34[1] |
| Survivors | 10[1] |
| Aircraft type | Tupolev Tu-134A-3 |
| Operator | Mozambique Air |
| Tail number | C9-CAA |
| Flight origin | Maputo, Mozambique |
| Last stopover | Mbala Airport (MMQ),[1] Zambia |
| Destination | Maputo International Airport (MPM), Mozambique |
The Mozambican presidential Tupolev Tu-134A-3 aircraft crashed just inside South African territory on October 19, 1986. The aircraft was carrying Mozambican president Samora Machel and 43 other occupants on a flight from Mbala in Zambia to the Mozambican capital Maputo when it crashed 35 nm (65 km) west of its destination at Mbuzini in the Lebombo Mountains.[2] Nine passengers and one crew member survived the crash, but President Machel and 33 others died, including ministers and officials of the Mozambique government.
While there was widespread suspicion—both nationally and internationally[2]—that the South African government was implicated in the crash, no conclusive evidence to this effect has emerged.
Contents |
South Africa's State Security Council (SSC) meeting in January 1984 minuted a discussion of their Mozambican working group, which included General Jac Buchner and Major Craig Williamson, where assistance to RENAMO was discussed as a means of overthrowing the FRELIMO government of Mozambique. The TRC later included this minute as circumstantial evidence in their inconclusive report.[3]
On March 16, 1984, the Nkomati Accord was signed at Komatipoort between South Africa and Mozambique. A clause in this agreement prohibited support of third-party resistance groups. In his commentary on the accord, South African foreign minister Pik Botha admitted in an SABC television interview that South Africa had offered limited support to RENAMO in the past.
On October 7, 1986 Mozambique was sharply criticised by South African general Magnus Malan for allegedly allowing terrorists to enter South Africa from its territory. The Frontline States convened an emergency meeting in Maputo on October 12, to address an incursion of Renamo operatives from Malawi. South Africa and Malawi's Banda were denounced as waging a terrorist campaign against Mozambique. Malan replied on October 15 by warning the Front Line leaders that they would share the consequences of ANC terrorist attacks.[4] Mozambique later cited Malan's remarks as evidence to implicate South Africa in the air crash.[5]
On Sunday, October 19, three Front Line leaders, Machel, Kenneth Kaunda and Eduardo dos Santos met at Mbala, Zambia, to confront Zairian president Mobutu Sésé Seko concerning his channeling of funds to UNITA, which was in alliance with South Africa.[4]
The airplane being used to transport Machel that day, registration C9-CAA, was manufactured by Tupolev in 1980 according to specifications for Mozambique. It had flown a total of 1,105 flying hours since new, and had underwent its last major inspection in August 1984 in the USSR. Service records indicated that it had been properly maintained, and data recovered from the Digital Flight Data Recorder (DFDR) showed the aircraft and all its systems were operating normally.[6]
The flight crew of five consisted of a captain, co-pilot, flight engineer, navigator and radio operator, who were all USSR state employees operating the aircraft for the Mozambican government. They were well experienced in both day and night flying in Mozambique and in landings at Maputo airport.[7]
On the morning of October 19th, Machel boarded the airplane at Maputo, and after a refueling stop in Lusaka, Zambia arrived at Mbala at 11:00. After the meeting with Kaunda and Dos Santos, Machel and his party re-boarded the aircraft and departed Mbala at 18:38 for a non-stop return to Maputo. The weather forecast for the flight was favourable, with an estimated time of arrival of 21:25.[8]
At 20:46, the flight made its first radio contact with Maputo Air Traffic Control (ATC), reporting its position and that it was continuing towards the Maputo VHF Omnidirectional Range (VOR) navigation beacon while maintaining an altitude of 35,000 feet. At 21:02 the crew radioed that they were ready to begin descending, and after being instructed by the Maputo controller to report reaching 3,000 feet MSL or when the runway lights were in sight, began their descent for an ILS approach to runway 23.[9]
Over the next eight minutes the aircraft maintained its required track toward Maputo with minor lateral deviations. Then at 21:10 the airplane commenced a turn away from Maputo to the right, lasting almost one minute in duration and a resulting heading change from 184° magnetic to 221°. At this time the Cockpit Voice Recorder (CVR) recorded the navigator stating the distance remaining to Maputo as 100 kilometres (54 nmi), then a comment from the captain about the turn, and the navigator's response that the "VOR indicates that way".[10]
Around 21:15 the navigator stated that the distance to Maputo was 60 kilometres (32 nmi). Over the next few minutes, there were several comments from the crew indicating that they believed the navigational aids at Maputo were unavailable: the captain stated that "there is no Maputo" and "electrical power is off, chaps!", while the navigator reported that the Instrument Landing System (ILS) and Distance Measuring Equipment (DME) were switched off and that the non-directional beacons (NDBs) were not working.[11]
Shortly after 21:18, the aircraft reached 3,000 feet in its descent, and the crew informed the Maputo controller that they were maintaining that altitude, however the airplane continued to descend. The Maputo controller granted clearance to the flight for an ILS approach to runway 23,[11] but after the flight crew reported the ILS out of service, the controller changed the clearance to a visual approach to runway 05. During this time, the navigator stated the distance to Maputo as 25-30km, the captain remarked that something was wrong, and the co-pilot said that the runway was not lit.[12]
The crew radioed the Maputo controller and asked him to "check your runway lights". Around 21:21 the navigator stated the range to Maputo as 18-20km, and the flight repeated its request to Maputo to check runway lights. Upon reaching an altitude of 2,611 feet AGL the Ground Proximity Warning System (GPWS) sounded and remained on, and although the captain cursed, the descent continued.[13]
During the last 22 seconds of the flight, the crew twice more radioed Maputo about the runway lights, affirming that they were not in sight, which was eventually acknowledged by the Maputo controller. Meanwhile the captain stated "cloudy, cloudy, cloudy" and the navigator exclaimed "no, no, there's nowhere to go, there's no NDBs, nothing!". The captain then added "Neither NDBs, nor ILS!", which were the last words recorded on the CVR. The aircraft first impacted terrain at 21:21:39,[13] approximately 35 nautical miles (65 km) west of Maputo in a hilly region at an elevation of 2,185 feet (666 m).[14] At the time of the accident, it was a very dark night, a few minutes before moonrise.[15] The last weather report passed to the aircraft indicated 10 kilometres (5.4 nmi) of visibility with 3/8 cloud cover at 1,800 feet.[16]
After being unable to contact the flight on the radio, the Maputo controller alerted authorities and Mozambican military units prepared for search and rescue. Since the last radio communication with the aircraft had been four minutes before its estimated time of arrival, the initial search area was defined around Maputo. Throughout the rest of the night and early morning helicopters flew search and rescue missions in an attempt to find the missing airplane, and in addition a marine search of Maputo Bay was carried out, all without success.[17]
The actual accident site was in a remote, inaccessible corner of South Africa,[18] approximately 150 meters from the Mozambiquean border.[19] The left wing hit a tree and then the aircraft had proceeded to break up before sliding down a hill, distributing the wreckage over a debris field 846m in length.[20] A police officer was alerted at approximately 23:00 by a villager from Mbuzini, and the first responder to the scene was a member of the Komatipoort police station who arrived at 23:40. The first medical personnel reached the site at 01:00. Shortly after 04:00, a helicopter and medical crew from the South African Air Force base at Hoedspruit arrived and proceeded to evacuate the survivors to Nelspruit hospital.[18]
Of the five members of the flight crew, only the flight engineer survived. All four Mozambican cabin crew were fatally injured, as were 26 of the 35 passengers.[21] According to the autopsy conducted by a South African pathologist, Machel died instantly.[22] Besides Machel, other notable dead include Marxist scholar and diplomat Aquino de Bragança, Machels possible successor Fernando Honwana, press secretary Muradali Mamadhussein, photo-journalist Daniel Maquinasse, transport minister Alcantara Santos, and transport minister Alcantara Santos.[23] One survivor died 2½ months after the crash from their injuries.[21]
Pik Botha later recalled being alerted to the crash at 04:30 by a phone call from the Minister of Law and Order, Louis le Grange, who stated that 30 to 40 on-board had been killed and Machel was apparent among the dead. According to Pik Botha, he telephoned and informed prime minister P. W. Botha; they both agreed that, considering the sensitivity of the situation, Pik Botha should accompany officials investigating the crash site.[5] At 06:50, South Africa first notified the Mozambican Government that a plane headed to Maputo had crashed in South African territory near the border.[24]
In Mozambique the first indications of the tragedy were when Radio Mozambique switched to funeral music at 08:30. Some minutes later Marcelino dos Santos, a member of the ruling FRELIMO Party, read a statement that President Machel's aircraft had not returned to Maputo as scheduled the previous evening. Dos Santos said authorities were analyzing the situation and appealed for people to both stay calm and remain vigilant.[24] Mozambican security minister, Sergio Vieira, traveled to Mbuzini with Pik Botha, and proceeded to the crash site and personally identified Machel's body.[25]
FRELIMO issued a second communique that evening confirming Machel's death. It did not accuse South Africa directly, however it did suggest that the crash had been criminal in origin.[23] While over the following days and weeks Mozambican government officials would continue to refrain from overt statements of South African complicity,[26] many other leaders in Africa stated outright that the apartheid government was responsible.[27] Violence erupted in Harare, Zimbabwe, when cars driven by whites were attacked by angry demonstrators, prompting an editorial rebuke in Mozambique that declared that Machel had been committed to a non-racial Africa.[23]
After lying in state at Maputo City Hall,[28] Machel's funeral on October 28th was attended by more than 100 foreign delegations. Eulogized as a fighter who died in the struggle against apartheid, banners in the crowd made reference to South African involvement in the crash.[26] Meanwhile, South African government officials also freely speculated as to the cause of the crash, suggesting weather or mechanical failure were to blame. Later Pik Botha declared that autopsies on the Soviet flight crew indicated that they had possibly been been intoxicated by alcohol.
On scene the South African police located and took custody of the CVR and FDRs (the aircraft was equipped with both digital and magnetic FDRs).[29] According to Pik Botha this was due to suspicions that they could be tampered with.[5] Media access to the site was limited to a team from SABC-TV.[29] Autopsies were conducted on only the four dead flight crew and three others[30] and the bodies returned to Mozambique without the approval of the SACAA.[29]
On arrival, Mozambican minister Sérgio Vieira asked for the documents that were taken from the aircraft to be handed to him. The SA commissioner of police, Johann Coetzee, had already made copies of these, and the documents were transferred to Vieira.[31]
In accordance with the South African Air Control Act, aircraft accidents are required to be investigated by the SA Department of Transport. Thus Pik Botha consulted Hendrik Schoeman of the Department of Transport, once Machel’s death was confirmed. After Botha and Schoeman had visited the crash site, Botha cited special circumstances and other international protocols as reasons to become involved.[5]
On a November 6 press conference Botha in addition announced that a document retrieved from the plane revealed a Mozambican-Zimbabwean plot to topple the Malawian government.[4] Finally the three international teams signed a protocol of secrecy on November 14, 1986[29] as Botha’s selective announcements were straining relations[4] between the teams and governments. Nevertheless Botha reported to Beeld newspaper on November 24, 1986 that he had listened to Maputo air traffic control’s recordings and studied a transcription of them. These he acquired from Foreign Affair’s representative in the South African team.
Director Renee van Zyl of the South African Civil Aviation Bureau then served a writ on Botha and the SAP, and received the two recorders unceremoniously at 15:45 on November 11, 1986. On October 24th a 26-member Soviet and Mozambican delegation traveled from Maputo to Komatipoort to join the South African team investigating the crash.[28] Eventually agreement was reached for representatives of South Africa, Mozambique and the Soviet Union to jointly examine the CVR tapes under Swiss auspices in Zurich.[27] The DFDR was taken to Moscow where the data from it was retrieved in the presence of representatives of all three countries.
According to South Africa approaches were made to both the United States National Transportation Safety Board and the British Air Accidents Investigation Branch requesting official assistance in the investigation, however both agencies were not willing to become involved on in individual basis.[32] Pik Botha would later state that on his recommendation, due to the mounting suspicions of South African culpability in the crash, the services of three foreign individuals were obtained, and these persons became three of the six members of the Board of Inquiry.[5] These individuals were: Frank Borman, an aeronautical engineer, former United States test pilot, astronaut and CEO of Eastern Air Lines, Geoffrey Wilkinson, former head of the British Department for Transport’s Air Accidents Investigation Branch, and Sir Edward Eveleigh, former Lord Justice of Appeal and member of the British Privy Council.[33]
The three South African board members included J.J.S. Germishuys, former South African Commissioner for Civil Aviation, and P. van Hoven, chairman of the Airlines Association of South Africa.[33] The inquiry was chaired by Cecil Margo, a member of the South African Supreme Court who had participated in several other high-profile aircraft accident investigations previously.[2] Board members participated in the earlier fact-finding portion of the investigation, and conducted public hearings at the Supreme Court in Johannesburg from January 20th until January 26th, 1987. The board then adjourned to analyze the evidence and reach conclusions as to cause.[34]
The board concluded that the 37° turn was executed by the navigator using the autopilot's Doppler navigation mode,[35] which when set maintained the desired heading while making corrections for wind drift. The navigator performed this turn after he saw the VOR signal indicating that the aircraft had intercepted the Maputo VOR 45° radial, the compass direction from Maputo on which the crew intended to turn and approach for a landing on runway 23. However the turn actually put aircraft on a path following a 45° radial from the VOR beacon at Matsapa Airport, Swaziland.[36]
Discounting the possibility of a false VOR beacon, an analysis of which was included in an appendix, the board considered it probable that the flight crew had inadvertently set the first of two VOR receivers on board to the Matsapa VOR frequency.[37] This error was made more likely by the poor design of the instruments, the absence of back lighting of the selected frequencies, the fact the the two frequencies were unusually close, 112.7 MHz for Maputo and 112.3 MHz for Matsapa, and the similarity between the figures '7' and '3' on the Soviet instrumentation.[38]
The board considered it "quite likely" that after the turn the captain re-tuned first VOR receiver to the ILS frequency, as the intrument was found in this state after the crash. For the final stages of flight, the aircraft was not following any VOR signal; instead the autopilot was tracking the 221° heading the navigator had set earlier during the turn. The post-accident settings of the second VOR receiver showed that it was displaying the airplane's position relative to Maputo and was correctly set to the Matupo VOR frequency, but was apparently not being used to guide the autopilot nor was it being monitored by the crew.[39]
The captain's initial erroneous assumption that Maputo had suffered an electrical blackout was never reconsidered by the crew, despite evidence to the contrary. Throughout the descent the crew were in radio contact with the Maputo controller, who therefore had electrical power, and backup power generators were standard equipment for airport navigational aids.[40] All the navigation aids at Maputo were determined by the board to be working at the time of the accident, although the aircraft was flying too far away and too low to receive the ILS and NDB signals.[41] When announcing the distance remaining to Maputo the navigator was apparently referring to the Doppler navigation system, which was not accurate, rather than the DME equipment available on board which correctly displayed the distance to the Maupto DME beacon.[42]
The crew were criticized for failing to perform any checklist items or navigational aid identification,[43] as well as for the distractions and non-essential conversations in the cockpit during the descent into Maputo.[44] As a consequence of not announcing to the other crew members which navigational aids were being used, or the frequencies being set, mistakes could not be corrected by others through "cross-checking".[45] Regarding it essential that the relatively large crew in the cockpit work as a well-integrated team, the board concluded that "demonstrably they had not".[43]
The board found that use of non-standard phraseology between the Maputo controller and the crew led to confusion about the status of the ILS signal and whether the runway lights were on.[46] The flight crew's repeated requests to "check runway lights" were interpreted by the controller, based on the use of the word 'check' in civil aviation, as confirmation by the crew that they had the runway lights in sight.[47] The aircraft had not refueled at Mbala before departing and did not have enough fuel remaining to reach the intended alternative airport in Beira, Mozambique by the time it reached Maputo.[48] This may have greatly increased the pressure on the crew to continue with the landing approach to Maputo despite the difficulties encountered.[45]
Although the Maputo controller had specifically cleared the aircraft only to 3,000 ft and no lower until the runway lights were in sight, the descent continued below that height at a rate of 500 feet per minute, without the runway lights visible, in darkness and partially cloudy conditions.[49] The only reaction to the warning by the GPWS, which sounded for 32 seconds, was the captain exclaiming "Damn it!" and a very slight nose-up pitch of the aircraft. The board concluded that even just seconds before the impact had the crew performed the required procedures for a GPWS alert when flying over hilly or unknown terrain, quickly raising the nose and increasing power, this would have prevented the crash.[50] The captain was singled out for criticism by the board for the decision to continue the descent without any ground references and with the belief that all navigation aids at Maputo were not working, instead of climbing to the published minimum safe altitude for the Maputo area of 3,600 ft and verifying his position through other aids available, including his radar.[51]
The board of inquiry determined that:
The cause of the accident was that the flight crew failed to follow procedural requirements for an instrument let-down approach, but continued to descend under visual flight rules in darkness and some cloud, i.e. without having some contact with the ground, below minimum safe altitude and minimum assigned altitude, and in addition ignored the GPWS alarm.[52]
In addition the board issued five safety recommendations which covered the use of and recurrent training in approved terminology in ATC communications for both ground and flight crews, monitoring of crew compliance with established procedures, a proposal that CVRs retain a record of the last hour of fight, rather than the standard of 30 minutes, and the importance of maintaining navigational aids to international standards.[53]
The report was endorsed unanimously by the six members of the board and submitted to the South African Minister of Transport Affairs on July 2nd, 1987.[54]
The Mozambican delegation, representing the State of registry of the aircraft, had a right by international treaty to review a draft of the report and submit their comments for consideration.[55] The Mozambican team provided 11 pages of suggested corrections to the draft,[56] some of which were adopted by the Board.[57] In their submission the Mozambican delegation stated that according to the survivors the RSA police searched the aircraft for documents rather than tending to the injured passengers.[58]
Mozambique also provided a technical report prepared by Ron Chippindale of the New Zealand Office of Air Accidents Investigations examining the possibility of tampering with or replacing the genuine Maputo VOR signal with a decoy. His conclusions were that it would be "simple" to setup a mobile VOR, however in order to effectively replace the genuine signal the Maputo VOR would have to be turned off.[59]
The Mozambican analysis of and findings from the evidence led them to conclude:[60]
The USSR, the state of manufacture of the aircraft, was given a draft of the final report and a chance to review and submit comments in accordance with ICAO convention. In their remarks, the USSR reiterated their endorsement of the previously agreed upon factual information contained in the draft. However regarding the analysis, conclusions and recommendations that followed, the Soviets stated the basic task of the investigation should be to determine the reasons for the 37° turn, which "remained unsolved in the report", and that conclusions of the draft based on the crew's errors were "totally ungrounded". They ended their remarks with a full rejection of the draft, calling it "worthless", and instead offering their own analysis and conclusions.[61]
The Soviet delegation stated the theory that the crew had mistakenly selected the Matsapa VOR was contradicted by the known settings of the onboard navigation equipment and the timing of the turn. They said that the data recovered from the magnetic flight data recorder did not correspond to the path of an aircraft following the signal from the Matsapa VOR. The Soviet team submitted a technical report to support their belief the Matsapa VOR's signal was not strong enough at the point of the turn for the navigation equipment on-board the aircraft to receive it effectively,[62] and further that the airplane was below the coverage of the VOR, therefore the signal from the Matsapa VOR could not have been the cause of the deviation.[63]
According to the Soviets the other navigational aids at Maputo were not strong enough to reach the aircraft and therefore were of no help to the flight crew.[64] A LAM Airlines Boeing 737 flying at around the same time as the accident aircraft reported receiving the Matupo VOR signal unusually early, at a distance of about 190 nautical miles (350 km). The Soviets stated that this was actually the false decoy beacon that was working with a higher signal level that the actual Maputo VOR.[65]
The Soviets stated that there was an earlier ground proximity warning system (GPWS) alert about 4½ minutes before impact which was triggered by the signal from the decoy VOR beacon, and this false alert was interpreted by the flight crew as a systems fault in the GPWS.[66] Receipt by the flight crew of the visual landing clearance from the Maputo controller implied a permission to descend below 3000ft according to ICAO procedures.[67] When the GPWS sounded shortly before impact the crew, doubting its reliability, disregarded it as false, and believing they were over the low terrain continued their descent.[67]
The Soviets concluded that:[68]
Reiterating their position that the most important event that led to the crash was the decision by the flight crew to continue their descent the board stated that:
| “ | Whatever the reason for the premature turn of 37° to starboard, that was not the real cause of the accident any more than was the flight itself | ” |
Suspicion of a false beacon in the Lebombos was first expressed by South African helicopter pilots on the morning following the crash, followed by a similar suggestion in an anonymous call to UPI by a supposed SAAF officer, a day later.[4] The pilots' speculative remark was revealed to Sérgio Vieira, Mozambique's minister of security, in a rash comment by South African police commissioner Johann Coetzee[4] Neither the Mozambican or Russian teams however, nor any witness testimony given, supplied any evidence or direct allegation concerning a secondary beacon to the Margo commission.[2] The Margo commission's draft report then proposed Matsapa airfield's VOR, combined with pilot error, as playing a likely role in the trajectory followed by the aircraft. The USSR delegation disputed this, saying the signal was obscured by mountains.[2]
A breakdown in communications followed, causing Gen. Earp of the South African Air Force to authorise military pilots to penetrate Mozambique airspace to test the Matsapa theory.[2] They returned with confirmation, though the final report relied on additional testimonies of commercial pilots who flew on C9-CAA's track. They likewise confirmed clear VOR signals from Matsapa.[2] Mozambican pilot Dias, who supported the Matsapa theory, illustrated his interpretation of events to Mozambican officials on a flight from Lisbon to Maputo.[69] Mozambican authorities however remained unconvinced and suspended air controller de Jesus on May 5, 1998, for allegedly having been bribed to tamper with Maputo airport's beacon on the night of the crash.[70]
Twelve years after the crash, when the apartheid regime had been replaced by a democratically-elected South African government, a special investigation into Machel's death was carried out in 2001 by the Truth and Reconciliation Commission (TRC).
The TRC investigation was criticized for taking place in camera and without any aviation specialist being present. The testimony was further led by a prominent radio journalist rather than a judge. The TRC's investigation did not find conclusive evidence to support or refute either of the earlier reports. Nonetheless, some pieces of circumstantial evidence collected by the TRC lead to questions being raised about a number of the Margo Commission's findings:
The TRC report concluded that the questions of a false beacon and the absence of a warning from the South African authorities require "further investigation by an appropriate structure".[3]
A police video in the TRC's possession shows South African foreign minister Pik Botha telling journalists at the crash site that President Samora Machel and others killed in the crash were his and President P.W. Botha's "very good friends", and that their deaths were therefore a tragedy for South Africa.
In January 2003, the Sowetan Sunday World reported that an apartheid era killer and former CCB member, Hans Louw, serving a 28-year term at Baviaanspoort Prison near Pretoria, had confessed to participating in a plot to kill Machel. A false radio navigational beacon would have been used to lure the aircraft off course, with Louw forming part of an alleged backup team to shoot the aircraft down if it didn't crash. The newspaper also alleged that another of the plotters, former Rhodesian Selous Scout, Edwin Mudingi, supported Louw's claim. However, after an investigation by the Scorpions, a South African special police unit, it was reported in July 2003 and in October 2008 that they could find no evidence for South African complicity.[29][31][71][72][73][74]
South African minister of Safety and Security, Charles Nqakula announced on February 2, 2006 that the Machel death crash inquiry would be reopened. He told reporters in parliament that all of South Africa's law enforcement agencies were expected to be involved in the probe, in co-operation with their Mozambican counterparts.[75][76]
A Mbuzini wreath laying ceremony on October 17 was attended by Graça Machel and addressed by Nelson Mandela. Mandela declared the initial simple memorial a South African national monument and hailed Machel as a universal hero whose life exemplified the highest ideals of internationalism and universality. Mandela cautiously claimed that the precise chain of events leading to Machel's death were uncertain and elusive, and repeated an earlier promise that no stone would be left unturned to establish the full truth.[2][77][78]
A Samora Machel Monument was erected at the crash site. Designed by Mozambican architect, Jose Forjaz, at a cost to the South African government of 1.5 million Rand (US$ 300,000), the monument comprises 35 whistling wind pipes to symbolise each of the lives lost in the air crash. It was inaugurated on January 19, 1999 by Nelson Mandela, his wife Graça, and by President Joaquim Chissano of Mozambique.
At the 20th anniversary of the crash on October 19, 2006, South African president, Thabo Mbeki declared the memorial a national heritage site.[79] Leading up to the event the Mozambican president Guebuza, who chaired the Mozambican inquiry in 1986, repeated a commitment to discover the truth about the incident,[80] while President Mbeki, in his state of the nation address of February 3, 2006, mentioned that a satisfactory explanation was still lacking.[81]
At the Mandela-Machel wedding ceremony on July 18, 1998, Mandela was however reported to have announced that Samora Machel was murdered, without reference to the South African board of enquiry's findings.[2] Graça Machel believes the air crash was no accident and has dedicated her life to tracking down her late husband's killers. In May 1999, Graça Machel said in an interview on SABC TV's News Maker programme that she remained convinced the apartheid regime was responsible, and challenged former foreign minister Pik Botha to come clean about Samora Machel's death. In reply, Botha told SABC TV on May 16, 1999 that although he had been one of the first people on the scene and was called on to identify Machel's body, the only facts he knew about the crash were the findings of the Margo Commission:
| “ | "I totally reject any suggestion that I could have been a party to a decision of that nature. It is an extremely sad moment for me. - Pik Botha | ” |
A study in the Quarterly Journal of Economics reached the conclusions that the crash had immediate wider repercussions for Mozambique's economy. An annual 7.7% decline in GDP under Machel's communist nationalisation policies, reverted to growth averaging 2.4% per annum under the freer, multi-party democracy in the tenure of his successor, Joaquim Chissano.[82]
The theory that South African agents were involved in the death of Machel was the basis of a book, Blood Safari (Afrikaans version was titled "Onsigbaar") by South African author Deon Meyer.
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