A long-simmering dispute over the cause of the 1978 Air India 171 crash has erupted anew, with a group of British aviation safety experts calling for an independent investigation into the disaster that killed 213 people. The experts, led by former Air Accidents Investigation Branch (AAIB) officials, argue that the original Indian inquiry was flawed and that new evidence points to a catastrophic design flaw in the Boeing 747-200's fuel system.
The flight, operating from Bombay to New York, crashed into the Arabian Sea shortly after takeoff. The official Indian report blamed pilot error, citing a loss of situational awareness during a steep turn. But the British experts claim that analysis of recovered wreckage and recently declassified documents suggests an explosion in the centre fuel tank, similar to the mechanism that downed TWA Flight 800 in 1996.
“The Indian report was shaped by political pressure to shift blame away from Boeing and the aircraft’s design,” said Dr. Margaret Thornton, a former AAIB metallurgist and lead author of a new technical brief submitted to the UK Civil Aviation Authority. “We have identified fatigue fractures in fuel line couplings that are consistent with a fuel-air explosion. This was not pilot error. This was a systemic failure.”
The experts have requested that the International Civil Aviation Organization (ICAO) convene a fresh inquiry under Annex 13, which would grant them access to wreckage still held in Indian Air Force storage facilities. New Delhi has so far refused, citing the closure of the original investigation and the absence of any new “credible” evidence. Indian officials have dismissed the British demands as “sensationalist” and “a slight on India’s investigative capabilities.”
But the timing of this challenge is significant. The UK is in the midst of a broader reassessment of aviation safety protocols following a series of near-misses involving Boeing aircraft. The British government has quietly funded a parallel review of fuel tank inerting systems, which are now standard on newer jets but were absent from the 747 in 1978.
The Air India 171 case also carries diplomatic weight. India’s aviation sector is a major buyer of Western aircraft, and any finding of a design flaw could open Boeing to billions in liability claims. The experts have stressed that their demand is not about blame, but about preventing future disasters. “If we ignore this, we are condemning the families of those 213 people to an incomplete truth,” said Thornton. “More importantly, we are leaving a known hazard unaddressed.”
The ICAO has yet to respond to the request. But the British government’s Office for Transport Safety has indicated it will raise the matter at the next ICAO assembly. For now, the crater in the Arabian Sea where Air India 171 went down remains a site of contested memory – and a cautionary tale about how politics can cloud even the most technical of investigations.
