As investigators continue to piece together the full picture, early findings of the Air India crash are pointing towards a critical area of concern — the aircraft’s fuel control switches.
The flight, bound for London Gatwick, crashed just moments after taking off from Ahmedabad airport on 12 June, killing all but one of the 242 people on board the plane and at least 19 on the ground.
According to the preliminary report by India’s Aircraft Accident Investigation Bureau (AAIB), the two engine fuel control switches on the plane were moved from the “RUN” to “CUTOFF” position.
These switches control fuel flow to the engines and should only be used when the aircraft is on ground, first to start the engines before a flight and later to shut them down at the gate.
They are designed so they’re unlikely to be changed accidentally, pointing to possible human error on the Air India flight.
The findings include the final conversation between the pilots and show there was confusion in the cockpit as well.
When one pilot asked the other why he cut off the fuel, he responded to say he did not do so.
Moments later, a Mayday call was made from the cockpit, but the plane could not regain power quickly enough and plummeted to the ground.
Captain Amit Singh, founder of Safety Matters Foundation, an organisation dedicated to aviation safety, told Sky News: “This exchange indicates that the engine shutdowns were uncommanded.
“However, the report does not identify the cause – whether it was crew error, mechanical malfunction, or electronic failure.”
Previous warning of ‘possible fuel switch issue’
“The Boeing 787 uses spring-loaded locking mechanisms on its fuel control switches to prevent accidental movement,” Mr Singh explained.
But a previous bulletin from the Federal Aviation Administration (FAA) “warned that these switches might be installed with the locking feature disengaged,” he said.
This could “make them susceptible to unintended movement due to vibration, contact, or quadrant flex”, he added.
Speaking to Sky News, aviation expert Terry Tozner said: “The take-off was normal, the aircraft rotated at the correct speed left the ground and almost immediately, the cut-off switches were selected to off, one then two.
“But nobody has said with any clarity whether or not the latch mechanisms worked okay on this particular aircraft. So we can only assume that they were in normal working order.”
In India, there has been a backlash over the findings, with some saying the report points to pilot error without much information and almost dismisses the possibility of a mechanical or electric failure.
Indian government responds
India’s civil aviation minister Kinjarapu Ram Mohan Naidu has been quick to respond, saying: “We care for the welfare and the wellbeing of pilots so let’s not jump to any conclusions at this stage, let us wait for the final report.
“I believe we have the most wonderful workforce of pilots and crew in the whole world.”
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Both pilots were experienced, with around 19,000 flying hours between them, including more than 9,000 on Boeing 787s.
The report says the aircraft maintenance checks were on schedule and that there are no signs of fuel contamination or a bird strike.
So far, no safety recommendations have been issued to Boeing or General Electric, the engine manufacturers.
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Concern over destroyed flight recorder
Mr Singh said “the survivability of the flight recorders also raises concern”.
The plane’s rear flight recorder, designed to withstand impact forces of 3,400 Gs and temperatures of 1,100C for 60 minutes, “was damaged beyond recovery”.
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“The Ram Air Turbine (RAT), which deploys automatically when both engines fail and power drops below a threshold, was observed as deployed in CCTV footage when the aircraft was approximately 60ft above ground level,” Mr Singh said.
“This suggests that the dual engine failure likely occurred before the official timestamp of 08:08:42 UTC, implying a possible discrepancy.”
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Mr Singh said it was also “of particular note” that the plane’s emergency locator transmitter (ELT) did not send any signal after the crash.
“Was the ELT damaged, unarmed, mis-wired, or malfunctioning?” he said.
The report has generated more questions than answers on topics including human error, power source failures and mechanical or electrical malfunction.
The final report is expected to take a year. Meanwhile, families grapple with the unimaginable loss of loved ones in one of the worst disasters in India’s aviation history.
