The last six months or so have seen some dreadful aviation accidents/crashes and the Air India Dreamliner/787 crash on 12 June 2025 just after takeoff from Ahmedabad, India has to be one of the most notorious/awful. There has been much discussion/speculation on various online forums and among the plethora of youtube pilot 'experts'. There are the usual calls for all discussion/speculation to be clamped down on - once the self-appointed 'experts' have had their 'say' of course. In this instance the 'conclusions' are not pleasant reading for the airliner crew/pilot fraternity as once again we find ourselves facing a situation where the responsibility for the deaths of 240 or so hapless passengers may have to be placed firmly at their door. Even despite the reluctance of the official interim report to call a spade a spade. This crash is among the worst of the last ten years or so - and yet we still have to wait another 12 months or so for the 'official' verdict. Those poor families..
..The Air India B787 interim accident report focuses on the operation - apparently shortly after takeoff - of the (mechanical) fuel cut off switches. That they were operated - mechanically and not as the result of some glitch or accidental movement caused by vibration - is apparently confirmed by the CVR (voice recorder) and the time stamp details. But there must have been more said after the 'why did you operate the cut off' and the response 'I did not do so' - in fact why even say it out loud? Put them back on to 'Run' immediately rather than wait ten seconds. (no it wasn't just a 'couple of seconds' as some have said). Nor does the report state what the engines were doing prior to these switches being flipped off and on - was the non-flying pilot attempting to restart the engines after a loss ofpower?
Below; extract from the incident report showing the fuel cut off switches and the throttle control module recovered from the crashed airliner.
As former B777 captain Dan Gryder shows in his 'Probable Cause' video (below) it is the action of just 4 seconds to switch both fuel cut off switches back into the run position. Of course, still climbing out, the aircraft was too low to recover, as probably the (culpable?) pilot intended. There is no further comment published in the interim report. A former air investigator commented on the BBC;
" ..it is very disappointing to read a report which provides a few salient details but leaves more questions unanswered.."
The pilot flying the take off (both hands on yoke) is not likely to have operated the switches but would he have noticed the other pilot (aircraft captain, hand perhaps covering the throttles as is normal practise) doing this manual action twice in quick succession? Would he not have exclaimed ' what are you doing?!' He may have been too stunned/numb to immediately react. There's no clue from the abridged (?) transcript from the CVR of the tone and inflection of the crew's words. In the shock of the moment did the crew use their native tongue, and was at least some of what they said lost in translation? Likewise the response, "I didn't do so." Was this indignant? Defensive? Accusatory?
As the BBC commentator put it, " the very worst reports are those designed to be read 'between the lines'... " - intimating that this is what we have here.
While Dan Gryder speculates his theory (see video below) it has been reported by Indian media that the investigation is NOT focussing on a human action causing the fuel switches to appear in the CUTOFF position, but on a system failure. Service Bulletins by Boeing issued in year 2018 recommending to upgrade the fuel switches to locked versions to prevent inadvertent flip of the switches, as well as the FAA/GE issued Service Bulletin FAA-2021-0273-0013 Attachment 2 relating to loss of control issue (also see above) were NOT implemented by Air India. The stated MN4 computer with faulty soldering, that might weaken and lose contact due to the thermal stress after a number of cycles, interprets data and commands fuel metering valves - with the lost contact attaching the MN4 processor to the EEC intermittent electrical contact, loss of signal processing and engine control faults can occur. The SB writes under conditions for the SB: "An LOTC (Loss Of Thrust Control) event has occurred due to an EEC MN4 microprocessor solder ball failure." According to discussions in the industry it may be possible with the number of cycles VT-ANB had already completed, the solder balls were weakened sufficiently to detach the MN4 from the EEC momentarily due to loads during the takeoff rotation leading to the loss of control of thrust and shut down of the engines.
Maybe there will be more in the official accident report to be published in around 12 months time. In the mean time all we can do is 'speculate' as the authorities leave an information 'vacuum'. Incidentally 'Mentour Pilot' has recently highlighted a Chinese air crash caused by a murder/suicide pilot where the official report will not/has not been published for reasons of 'social cohesion'.
In the short 8-minute video below Dan Gryder offers his analysis. Just a single click on the red button enables you to watch this short video here.
