Incident · 2016-10-26

NTSB case ENG17IA003 · AIRBUS A330 223 · Part 121

What the record says

Event date: 2016-10-26
Event type: Incident
Highest injury level: No injuries
Aircraft: AIRBUS A330 223 (N855NW)
Operating rule: Part 121
Operator: DELTA AIR LINES, INC. Operator named in NTSB report
Operated by (per NTSB report): DELTA AIR LINES INC

Probable cause

A No. 1 engine fire caused by a fuel manifold supply line high cycle fatigue crack which led to a fuel leak that subsequently ignited on hot engine case surfaces. The fatigue crack originated and progressed due to elevated fuel manifold assembly vibration levels. Engine vibration testing identified a combustor tone that excites a natural (resonant) frequency of the fuel manifolds at specific engine speeds on Pratt & Whitney PW4000-94 and -100 inch fan series engines that feature a TALON II combustor.

Source: NTSB case ENG17IA003

Flight crew

No flight-crew details recorded in the NTSB accident database for this event.

Facts as the NTSB records them — GroundCheck adds no judgement. Preliminary records may be revised as the investigation proceeds.

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