South African Airways Flight 295, sometimes referenced and known as the Helderberg disaster, was a scheduled international passenger flight from Chiang Kai-shek International Airport, Taipei, Taiwan, to Jan Smuts International Airport, Johannesburg, South Africa, with a stopover in Plaisance Airport, Plaine Magnien, Mauritius. On November 28, 1987, the aircraft serving the flight, a Boeing 747 named Helderberg, experienced a catastrophic in-flight fire in the cargo area, broke up in mid-air, and crashed into the Indian Ocean east of Mauritius, killing all 159 passengers and crew on board. An extensive salvage operation was mounted to try to recover the aircraft's flight recorders, one of which was recovered from a depth of 16,100 feet (4,900 m).
The official inquiry, headed by Judge Cecil Stanley Margo, was unable to determine the cause of the fire. This lack of a conclusion led to theories, debates, and speculation about the nature of Flight 295's cargo, as well as a subsequent post-apartheid investigation and calls from relatives of those on the flight to re-open the investigation in the years following the accident. Following the accident, South African Airways (SAA) stopped using the Combi version of the Boeing 747 due to safety concerns about the main deck cargo compartment.
Aircraft and crew
The aircraft involved was a 7-year-old Boeing 747-244BM Combi registered ZS-SAS and named Helderberg. This was the 488th 747 built, made its first flight on 12 November 1980 and was delivered to SAA on 24 November 1980.
The Boeing 747-200B Combi model permits the mixing of passengers and cargo on the main deck according to load factors on any given route and Class B cargo compartment regulations.
Flight 295 had 140 passengers and six pallets of cargo on the main deck. The master waybills stated that 47,000 kilograms (104,000 lb) of baggage and cargo were loaded on the aircraft. A Taiwanese customs official performed a surprise inspection of some of the cargo; he did not find anything that could be characterised as suspicious. According to Tinus Jacobs who was SAA's manager in Taiwan at the time of Flight 295, the flight crew appeared relaxed and "happy to fly" before takeoff and did not display any concerns about the cargo.
The captain of Flight 295 was 49-year-old Dawid Jacobus Uys, a former South African Air Force pilot with 13,843 hours' experience of which 3,884 hours was on the Boeing 747 series airplanes. Uys was described by colleagues as having a professional, skilled and friendly personality, and at the time of the accident was considering retiring to take up a role with the South African Pilots' Association. The flight crew also consisted of 36-year-old first officer David Attwell and 37-year-old relief first officer Geoffrey Birchall, with 7,362 and 8,749 hours' experience (including 4,096 and 4,555 hours on the Boeing 747) respectively; and 45-year-old flight engineer, Giuseppe "Joe" Bellagarda and 34-year-old relief flight engineer, Alan Daniel, with 7,804 hours and 1,595 hours (4,254 and 227 of them on the Boeing 747) of experience respectively.
Accident
Flight 295 took off at 14:23 UTC (22:23 local time) on 27 November 1987 from Chiang Kai Shek International Airport near Taipei on a flight to Johannesburg via Mauritius.
Thirty-four minutes after departure, the crew contacted Hong Kong air traffic control to obtain clearance from waypoint ELATO (22°19′N 117°30′E / 22.317°N 117.500°E) to ISBAN. A position report was made over ELATO at 15:03:25, followed by waypoints SUNEK at 15:53:52, ADMARK at 16:09:54 and SUKAR (12°22′N 110°54′E / 12.367°N 110.900°E) at 16:34:47. The aircraft made a routine report to the SAA base at Johannesburg at 15:55:18.
At some point during the flight, believed to be during the beginning of its landing approach to Mauritius, a fire started in the cargo section on the main deck which was probably not extinguished before impact. The 'smoke evacuation' checklist calls for the aircraft to be depressurized, and for two of the cabin doors to be opened. No direct evidence exists that the checklist was followed or that the doors were opened; however, Air Traffic Control communications and the cockpit voice recording suggest either one or both actions may have taken place. A crew member may have also gone into the cargo hold to try to fight the fire. A charred fire extinguisher was later recovered from the wreckage on which investigators found molten metal and melted cargo netting.
The following communication was recorded with Mauritius air traffic control, located at Plaisance Airport near Port Louis:
The fire began to destroy the aircraft's important electrical systems, resulting in loss of communication and control of the aircraft. At exactly 00:07 UTC (4:07 local time), the aircraft broke apart mid-air, the tail section breaking off first when the fire began to burn the structure of the aircraft, and crashed into the Indian Ocean, about 134 nautical miles (154 mi; 248 km) from the airport. Other theories given for the ultimate demise of the aircraft were that the flight crew eventually became incapacitated by the smoke and fire or extensive damage to the 747's control systems rendered the plane uncontrollable before it hit the ocean.
After communication with Flight 295 was lost for thirty-six minutes, at 00:44 (04:44 local time), air traffic control at Plaisance Airport formally declared an emergency. All 140 passengers and 19 crew members aboard died in the crash.
Search and salvage
When Flight 295 last informed Plaisance air traffic control of its position, its report was incorrectly understood to be relative to the airport rather than its next waypoint, which caused the subsequent search to be concentrated too close to Mauritius. The United States Navy sent aircraft from Diego Garcia, which were used to conduct immediate search and rescue operations in conjunction with the French Navy. By the time the first surface debris was located twelve hours after impact, it had drifted considerably from the impact location. Oil slicks and eight bodies showing signs of extreme trauma appeared in the water. There were no survivors.
After recovery of the wreckage from 4,500 m (14,800 ft) below the surface of the ocean, the aircraft's fuselage and cabin interior were partly reassembled in one of SAA's hangars at Jan Smuts Airport, where it was examined and finally opened for viewing to the airline's staff and selected members of the public. In November 2025, as part of the 38th anniversary commemoration of the disaster, these portions of the wreckage were handed over to the South African Airways Museum at Rand Airport. The material, which had previously been inaccessible to the public, was displayed during a memorial event attended by victims' families, and members of the public.
Investigation
Rennie Van Zyl, South Africa's head crash investigator, examined three wristwatches from baggage recovered from the surface; two of the watches were still running according to Taiwan time. Van Zyl deduced the approximate time of impact at 00:07:00, around three minutes after the last communication with air traffic control.
Immediately after the crash, the press and public opinion suspected that terrorism brought down Flight 295. South Africa, then under the control of the apartheid government, was the target of terrorism both domestically and internationally. Offices for SAA, the country's flag carrier, had previously been attacked and targeted by anti-apartheid protests. A year before, an angry crowd had ransacked the office of South African Airways in Harare. Experts searched for indicators of an explosion on the initial pieces of wreckage discovered, such as surface pitting, impact cavities and spatter cavities caused by white-hot fragments from explosive devices that strike and melt metal alloys found in aircraft structures. Experts found none of this evidence. The investigators drew blood samples from two of the recovered bodies and found that the bodies had soot in their tracheae, indicating that at least two had died from smoke inhalation before the aircraft had crashed, and concluded that some of the passengers would have already lost their lives even if the pilots had successfully reached the airport.
South Africa mounted an underwater search, named 'Operation Resolve', to try to locate the wreckage. The underwater locator beacons (ULBs) attached to the flight recorders were not designed for deep ocean use; nevertheless, a two-month-long sonar search for them was carried out before the effort was abandoned on 8 January 1988 when the ULBs were known to have stopped transmitting (at the time a ULB had to generate sonic pulses for thirty days). Steadfast Oceaneering, a specialist deep-ocean recovery company in the US, was contracted at great expense to find the site and recover the flight recorders. The search area is described as being comparable in size to that of the wreck of the Titanic, with the water at 4,900 metres (16,000 ft) being considerably deeper than any previously successful salvage operation. The wreckage was found on 28 January, within two days of Steadfast Oceaneering commencing its search.
Three debris fields were found: 19°10′30″S 59°38′0″E / 19.17500°S 59.63333°E, 19°9′53″S 59°38′32″E / 19.16472°S 59.64222°E and 19°9′15″S 59°37′25″E / 19.15417°S 59.62361°E. These locations were spread 1.5 km (0.93 mi), 2.3 km (1.4 mi) and 2.5 km (1.6 mi) apart, indicating that the aircraft broke apart in mid-air (it was suggested that the tail separated first). On 6 January 1989, the cockpit voice recorder (CVR) was salvaged successfully from a record depth of 4,900 metres (16,100 ft) by the remotely operated vehicle (ROV) Gemini, but the flight data recorder was never found.
Van Zyl took the voice recorder to the US National Transportation Safety Board (NTSB) in Washington, DC, both to show his goodwill and to ensure neutral observers. Van Zyl believes that if he had kept the CVR in South Africa he could have been accused of covering up the truth. At the NTSB, Van Zyl felt frustration that the degraded (but still functional) CVR, which had been in the deep ocean for fourteen months, did not initially yield any useful information. Around twenty-eight minutes into the recording the CVR indicated that the fire alarm sounded. Fourteen seconds after the fire alarm, the circuit breakers began to pop. Investigators believe that around eighty circuit breakers failed. The CVR cable failed eighty-one seconds after the alarm. The recording revealed the extent of the fire.
Van Zyl discovered that the front-right pallet located in the main deck's cargo hold was the origin of the fire. The flight manifest said that pallet mostly comprised computers in polystyrene packaging. The investigators said that the localised fire likely came in contact with the packaging and produced gases that accumulated near the ceiling. They also said that gases ignited into a flash fire that affected the entire cargo hold. The fire did not burn lower than one metre above the cargo floor. The walls and ceiling of the cargo hold received severe fire damage. Van Zyl ended his investigation without discovering why the fire started.
The official report noted the presence of the computer equipment, and suggested that a possible cause could have been the batteries contained in the computers exploding or spontaneously combusting, although this was not given as a conclusive cause of the fire.
Margo commission
An official commission of inquiry was chaired by South African Judge Cecil Margo, with co-operation from the NTSB and the aircraft's manufacturer, Boeing. The board of the "Margo Commission" consisted of Judge Cecil S. Margo, Judge Hurrylall Goburdhun (Mauritius), George N. Tompkins Jr (USA), G.C. Wilkinson (UK), Dr Y. Funatsu (Japan), J.J.S. Germisuys (South Africa), Dr J. Gilliland (South Africa), and Colonel Liang Lung (Taiwan).
The official report determined that while Flight 295 was over the Indian Ocean, a fire had occurred in the cargo hold of the main deck, originating in the front right-hand cargo pallet. Aircraft parts recovered from the ocean floor showed fire damage with sustained temperatures over 300 °C (570 °F); tests showed that temperatures of 600 °C (1,100 °F) would have been required to melt a carbon-fibre tennis racket recovered from the crash site. The fire also damaged and destroyed the aircraft's electrical systems resulting in the loss of many of the instruments on the flight deck and rendering the crew unable to determine their position. The reason for the aircraft's loss was not identified beyond doubt, but there were two possibilities detailed in the official report: firstly, that the crew became incapacitated by smoke that penetrated into the cockpit; and secondly, that the fire weakened the structure so that the tail separated, leading to impact with the ocean. The commission concluded that it was not possible to apportion blame to any one individual for the fire, removing any terrorism concerns. Boeing is quoted in the report as having "contested" any scenario that involved a break-up of the aircraft, hence the commission went no further than simply mentioning the two possible scenarios in its final report, as incidental to the primary cause of the accident.