Leaks within the western media with particular particulars about technical points and ‘human intervention’ referring to the crash of Air India flight AI 171 have led to a written attraction by the Director-General of India’s Aircraft Accident Investigation Bureau (AAIB), Ministry of Civil Aviation, Government of India, to await the publication of the ultimate investigation report. The leaks got here days earlier than the discharge of the AAIB’s preliminary report on July 12, a month after the air accident at Ahmedabad on June 12.
What else has the AAIB’s attraction mentioned? What are the opposite reactions?
The letter, dated July 17 and signed by G.V.G. Yugandhar, Director-General, AAIB, mentioned that the AAIB works in accordance with the Aircraft (Investigation of Accidents and Incidents) Rules 2017, and is liable for fulfilling the obligations of the Government of India in the direction of the International Civil Aviation Organization Annex 13. It highlighted “its flawless document within the investigation of 92 accidents and 111 critical incidents since its inception in 2012”. The assertion drew consideration to sure sections of the worldwide media repeatedly making an attempt to attract conclusions by means of selective and unverified reporting and referred to as such actions irresponsible. It added that the AAIB’s investigation and preliminary report are to offer details about “what” occurred, and that the ultimate report would come out with root causes and proposals. It added that the AAIB would publish updates as and when required, which have technical and public curiosity.
On July 18, in a press release on X, the U.S. National Transportation Safety Board (NTSB) Chairwoman Jennifer L. Homendy mentioned that “latest media experiences on the Air India 171 crash are untimely and speculative…”, ending with “investigations of this magnitude take time. We totally help the AAIB’s public attraction….”
Days earlier than the AAIB launched a 15-page preliminary report, aviation information service The Air Current had a report on July 8. It mentioned “Air India crash investigation focuses on motion of engine gas management switches” with a blurb that “information from the Dreamliner’s black field factors investigators in the direction of improper, inadvertent or intentional pilot actions”. On July 10, the Wall Street Journal (WSJ) had a report, “Air India probe Puts Early Focus on Pilots’ Actions and Plane’s Fuel Switches”. Again, on July 17, theWSJ had an unique report titled “New Details in Air India Crash Probe Shift Focus to Senior Pilot”. On July 18, an Italian day by day, the Corriere della Sera (based in 1876), revealed a report which claimed it had extra particulars from the cockpit voice recorder (CVR).
The experiences within the western media have led to a pushback by Indian pilot our bodies. A media report has mentioned that the Federation of Indian Pilots would “pursue all authorized treatments obtainable for defamation, psychological anguish and reputational hurt”. The International Federation of Air Line Pilots’ Associations additionally cautioned in opposition to hasty conclusions revealed by the media and social media based mostly on the preliminary report.
What has the preliminary report mentioned?
The report has targeted on the “engine 1 and engine 2 gas cutoff switches having transitioned from Run to Cutoff place, one after one other with a time hole of 1 second”, ensuing within the gas provide slicing off. There can be one sentence which says that within the “cockpit voice recording, one of many pilots is heard asking the opposite why did he cutoff. The different pilot responded that he didn’t achieve this.” The report has an image of the plane with its Ram Air Turbine — which is on the coronary heart of an plane’s emergency energy system — having deployed throughout the preliminary climb.
The engine 1 gas cutoff swap then transitioned from Cutoff to Run about 10 seconds after the cutoff, resulting in a thrust restoration. Four seconds later, an analogous transitioning for the engine 2 gas swap led to the total authority digital engine management of every engine robotically managing a relight and thrust restoration sequence. One of the pilots then transmitted a Mayday name.
The report has mentioned that it has no advisable actions in regards to the plane sort, the engine (GE’s GEnx-1B70/P2), and the producers — this has drawn criticism from pilot our bodies for ignoring ‘systemic vulnerabilities’.
The report’s lack of a full and uncooked CVR transcript with timestamps is what has drawn essentially the most criticism.
The coronary heart of the thriller now lies within the actions across the handbook gas selector switches.
Captain Matthew Buckley, a former U.S. Navy fighter pilot and a former first officer at FedEx and American Airlines, has informed The Hindu that the Boeing 787 is a data-linked, extremely networked plane, with its important flight techniques — particularly gas administration — digitally and bodily remoted. Even although the plane makes use of Ethernet-style spine techniques for a lot of avionics capabilities, the gas selector switches themselves are mechanical-electrical hybrids that can not be remotely accessed or altered from outdoors. He provides that had there been any software program anomaly, Boeing and the engine producer would have detected it by means of Aircraft Health Monitoring Systems. These techniques document and transmit real-time diagnostics, he mentioned.
He mentioned that the Boeing 787 has centralised digital techniques and information streaming to floor techniques in actual time. If there was an engine-related situation, both mechanical or systems-based, the engine producer would know immediately, as diagnostic updates could be despatched throughout flight.
What are the protection checks being accomplished by airways?
Last month, on June 13, the Directorate General of Civil Aviation (DGCA) directed Air India to hold out further security inspections on its Boeing 787-8 and 787-9 fleet. Professor Guy Gratton, Associate Professor of Aviation and the Environment, Faculty of Engineering and Applied Science at Cranfield University, U.Ok., has informed The Hindu that these indicate enhanced checks of {the electrical}, hydraulic and/or propulsion techniques.
The DGCA has additionally issued a directive (with inspection experiences by July 21, 2025) to test the locking mechanism of the gas management switches on the Boeing 737 and 787. A variety of airways have carried out precautionary checks of the gas selector switches of their Boeing 787 fleets. They embrace Singapore Airlines and Scoot (Singapore), Qantas (Australia), Etihad (UAE), Korean and Japan. This additionally flows from an advisory by the U.S. Federal Aviation Administration (FAA) in 2018 of the ‘potential for disengagement of the gas management swap locking characteristic’ on a number of Boeing plane households. Separately, Indian pilot our bodies have urged intensive checks of the 787’s engine management techniques.
How many 787s are there on the planet?
In an e-mail reply to The Hindu, Boeing has mentioned that the worldwide Boeing 787 fleet contains over 1,175 plane, having operated almost 5 million flights and logged greater than 30 million flight hours.
Can there be a greater investigation?
In an interview with Singapore’s media on July 16, whereas commenting on the AAIB’s preliminary report, International Air Transport Association chief Willie Walsh mentioned that there’s a robust argument to be made for video recorders to be put in in plane flight decks to assist accident investigators. This revives an virtually 25-year-old debate on the difficulty between the NTSB and the FAA.
The remaining line is that there must be a good and clear investigation with irrefutable findings. And this might take time.
