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| Date: | Friday 4 August 2023 |
| Time: | 14:46 |
| Type: |  Boeing 787-8 Dreamliner |
| Owner/operator: | Air India |
| Registration: | VT-ANW |
| MSN: | 36294/489 |
| Year of manufacture: | 2016 |
| Total airframe hrs: | 24175 hours |
| Engine model: | GE GEnx-1B |
| Fatalities: | Fatalities: 0 / Occupants: 267 |
| Other fatalities: | 0 |
| Aircraft damage: | Minor, repaired |
| Category: | Incident |
| Location: | near Mumbai -
 India
|
| Phase: | En route |
| Nature: | Passenger - Scheduled |
| Departure airport: | Mumbai-Chhatrapati Shivaji International Airport (BOM/VABB) |
| London-Heathrow Airport (LHR/EGLL) | |
| Investigating agency: | DGAC India |
| Confidence Rating: |  Accident investigation report completed and information captured |
Air India flight AI131, a Boeing 787-8 Dreamliner, suffered un-commanded shut down in-flight of engine no.1, forcing the flight crew to return to Mumbai Airport.
The aircraft took off from BOM at 14:37 local time. While climbing passing FL170 at 14:46, the crew heard a loud thud noise which was followed by EICAS caution ENGINE SURGE L.
As part of memory actions the corresponding thrust lever was retarded and it was observed that the ENGINE SURGE message had disappeared. As per the QRH abnormal and emergency procedures, when the advancement of throttle
lever of Eng# 1 was initiated ENG FAIL L was shown on EICAS which was followed by engine flameout.
The PIC declared PAN-PAN, decided not to jettison fuel and carried out an overweight landing with single engine uneventfully.
It was found that one of the HPC stage 10 blade got liberated due to improper installation of locking lugs which led to
Engine Surge and subsequent un-commanded shut down in-flight.
Accident investigation:
 |
|
Sources:
https://www.cnbctv18.com/aviation/air-india-london-bound-flight-returns-to-mumbai-due-to-engine-failure-17438071.htm
https://www.flightradar24.com/data/aircraft/vt-anw#316fe491
https://aerossurance.com/continuing-airworthiness/air-india-b787-genx-1b-in-flight-shut-down-after-maintenance-error-5-years-earlier/
Media:
A latent failure introduced during maintenance was dormant for 5 years. https://t.co/gUeLC3TaNH #aviationmaintenance #humanfactors #flightsafety #aviationsafety pic.twitter.com/43mEDGQonF
— Aerossurance (@Aerossurance) July 18, 2025
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 05-Aug-2023 07:38 | harro | Added |
| 10-May-2025 17:21 | ASN | Updated [Time, Total occupants, Damage, Narrative, Accident report, ] |
| 18-Jul-2025 13:06 | Aerossurance | Updated [Source, ] |
| 18-Jul-2025 13:19 | Aerossurance | Updated [Embed code, ] |
| 18-Jul-2025 13:20 | Aerossurance | Updated [Embed code, ] |
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