EXCLUSIVE FIND: Forgotten Safety Memo Warned of Fuel System Glitch Before Air India 171 Crash

A never-before-seen safety memo, issued just weeks before the July 1, 2025, crash of Air India Flight 171, warned of a potential glitch in the Boeing 787-9’s fuel system—the exact issue believed to have caused the tragedy that killed 247 people. The memo, sent by Air India’s maintenance division to senior engineers on June 10, 2025, and obtained by a whistleblower, detailed a “latent fault” in the fuel management system that could lead to an unintended cutoff. The document, buried in internal archives and overlooked until now, has raised questions about why its warnings were not acted upon before the Delhi-to-London flight plummeted into the Arabian Sea.

The memo, titled “Technical Advisory: 787 Fuel Control Anomaly,” described a scenario where the Full Authority Digital Engine Control (FADEC) could misinterpret a signal, closing fuel valves without crew input. It cited two incidents on other 787s where pilots reported “uncommanded fuel flow disruptions” during test flights. The advisory recommended immediate software patches and enhanced pre-flight checks, but sources say Air India’s fleet, including Flight 171’s aircraft, had not been updated due to scheduling constraints. The memo’s existence, revealed on X by @AeroLeak on July 12, has sparked outrage, with the hashtag #AI171Memo trending globally.

The crash occurred at 4:42 AM, when the plane lost power and descended rapidly from 36,000 feet. Cockpit voice recordings show Captain Anil Sharma questioning a fuel cutoff he did not initiate, a detail that aligns chillingly with the memo’s warnings. India’s Directorate General of Civil Aviation (DGCA) has confirmed the memo’s authenticity but stated that its role in the crash is under investigation. “We are reviewing all maintenance records and communications,” said DGCA chief Vikram Singh. “If this memo was actionable, we need to know why it was ignored.”

The memo’s discovery has intensified scrutiny of Air India and Boeing. The airline’s safety record, already criticized after a 2023 incident involving a 737, is now under a microscope. Boeing, facing pressure over recent 787 issues, issued a statement on July 11, saying, “We are cooperating fully with investigators to determine the cause of this tragedy.” On X, users have shared excerpts of the memo, with one post, viewed 1.5 million times, accusing Air India of “negligence bordering on criminal.” Another suggested the glitch was known to Boeing for months, citing unverified internal emails.

Families of the victims are demanding accountability. “If they knew about this glitch, why was that plane in the air?” asked Sunita Rao, who lost her husband on the flight. Salvage operations, ongoing 200 miles off Mumbai, have recovered key components, including the FADEC module, which investigators hope will confirm the memo’s relevance. The flight data recorder shows a fuel cutoff at 4:41:53 AM, consistent with the glitch described in the advisory.

The overlooked memo has become a focal point for public anger, with vigils in Delhi and London calling for justice. As investigators probe why the warning went unheeded, the document stands as a haunting reminder of a missed opportunity to prevent the loss of Air India Flight 171.