Investigation: maintenance assembly error in PW1127GA-JM caused IndiGo A320neo engine failure
Investigators concluded a maintenance assembly error during a shop visit caused extensive internal damage to a Pratt & Whitney PW1127GA-JM engine on an IndiGo A320neo, forcing the aircraft to return to Amritsar in February 2023. The finding attributes the in‑flight engine failure to human error during post‑maintenance assembly.