This day in Southern African History: 20 April, 1968. SA Boeing 707 crashes in Namibia

South African Airways Flight 228 was a scheduled flight from Jan Smuts International Airport in Johannesburg, South Africa to London Heathrow International Airport that flew into the ground soon after take-off after a scheduled stopover in Windhoek, South West Africa (present day Namibia).^[1] Five passengers survived while 123 people died. The subsequent investigation determined that the accident was attributable to pilot error. The accident is the deadliest aviation accident to date in Namibia.^[1]

History of the flight

South African Airways Flight 228 was a scheduled flight of the Boeing 707-300C Pretoria, registration ZS-EUW, on 20 April 1968 from Johannesburg to Heathrow via Windhoek, Las Palmas and Frankfurt.

The first leg of the flight under Captain Eric Ray Smith from Johannesburg to JG Strijdom Airport, Windhoek, South West Africa was uneventful. An additional 46 passengers embarked in Windhoek, and some airfreight was unloaded and loaded.^[2] The aircraft was only 6 weeks old when it rolled for take-off from Windhoek on runway 08 at 18:49 GMT (20:49 local time). It was a dark, moonless night with few if any lights on the ground east of the runway; the aircraft took off into what was described in the official report as a "black hole".^[3] The aircraft initially climbed to an altitude of 650 feet (200 m) above ground level, then levelled off after 30 seconds and started to descend. Fifty seconds after take-off, it flew into the ground in flight configuration at a speed of approximately 271 knots (502 km/h). The four engines, which were the first parts of the aircraft to touch the ground, created four gouges in the soil before the rest of the aircraft also hit the ground and broke up. Two fires immediately broke out when fuel in the wings ignited. Although the crash site was only 5.327 kilometres (3.310 mi) from the end of the runway, emergency services took 40 minutes to reach the scene because of rugged terrain. Nine passengers who were seated in the forward section of the fuselage initially survived, but two died soon after the accident and another a few days later, leaving a final death toll of 123 passengers and crew.^[3]

Investigation

Accident

The investigation was complicated by the fact that the aircraft did not have a flight data recorder or cockpit voice recorder;^[4] the devices became mandatory from 1 January 1968, but the airline's inability to procure recorders meant that several SAA aircraft including, ZS-EUW, did not yet have the equipment fitted.^[3] Captain Smith had 4,608 flying hours on the Boeing 707, but only one hour on the new type 334C, which furthermore had been under instruction.^[5] The official investigation concluded that the aircraft and its four engines were in working order—primary fault lay with the captain and first officer, in that they "failed to maintain a safe airspeed and altitude and a positive climb by not observing flight instruments during take-off."^[2] Secondary factors that may have contributed to the accident included:

 

• Loss of situational awareness
• The crew had no visual reference in the dark, leading to spatial disorientation.
• The crew used a flap retraction sequence from the 707-B series which removed flaps in larger increments than desirable for that stage of the flight, leading to a loss of lift at 600 feet (180 m) above ground level.
• The drum-type altimeter fitted to the aircraft, was notoriously difficult for pilots to read;^[6][7] the pilots may have misread their altitude by 1000 feet.
• After investigating this accident as well as a number of others that also involved controlled flight into terrain, the Federal Aviation Administration determined that a ground proximity warning system would have helped to avert some of the accidents. New regulations were therefore introduced from February 1972 requiring all turbojet aircraft to be fitted with the system.^[8]

References

1. ^ ^{a b} Aviation Safety Network (April 1968). "Boeing 707-344C Accident". Retrieved 16 January 2011.
2. ^ ^{a b} Haine, Edgar A. (2000). Disaster in the Air. Associated University Presses. ISBN 0845347772.
3. ^ ^{a b c} Report by the Board of Inquiry into the Accident to South African Airways Boeing 707-344C Aircraft ZS-EUW at Windhoek on 20 April 1968 (Report). Pretoria. November 1968.
4. ^ Alhadeff, Vic (1985). A newspaper history of South Africa, Volume 1984. p. 112. ISBN 186806008X.
5. ^ Aerospace Medicine (Aerospace Medical Association) 44 (5-8): 683. http://books.google.com/books?id=Qt85AQAAIAAJ.
6. ^ Barlay, Stephen (1969). Aircrash detective: The Quest for Aviation Safety: An International Report. Hamilton.
7. ^ "FSF CFIT Task Force Aircraft Equipment Team: Final Report". Federal Aviation Authority. 1997-01-23. p. 17.
8. ^ Brian Power-Waters (2001). Safety last: The Dangers of Commercial Aviation : An Indictment by an Airline Pilot. iUniverse. p. 150. ISBN 0595186939.

 Taken from: http://en.wikipedia.org/wiki/South_African_Airways_Flight_228 [20.04.12]