Overview
- The Federation of Indian Pilots presented results from 10 EASA‑certified Boeing 787 Level‑D simulator runs that it says contradict the Aircraft Accident Investigation Bureau’s interim timeline and causal chain for the June 12, 2025 AI‑171 crash.
- Citing a June 19 press conference, the pilots’ body said the simulator showed the Ram Air Turbine requires about 18 seconds to deploy and restore hydraulics, which it argues cannot match the roughly four‑second interval reported by AAIB for RAT deployment after fuel loss.
- FIP pointed to simulator engine‑spool behavior, FADEC fuel‑flow logic and the permanent magnet alternator’s role to argue that the engines could not have relit under the AAIB sequence unless fuel switches stayed in RUN, a claim that, if true, challenges the report’s inference of deliberate crew action.
- The federation raised technical anomalies including uneven damage to the two flight recorders, CVR audio lacking individual pilot channels, survivor accounts of flickering lights and a loud bang, and a cited history of uncommanded RAT events on 787s to support its electrical‑failure hypothesis.
- FIP has submitted its data to Boeing and Indian authorities, demanded AAIB run independent simulator validations, sought reinstatement of Boeing‑787 experts and called for a judicial inquiry while AAIB has not publicly changed its interim findings and the dispute remains unresolved.