Incident · 2023-06-28

NTSB case ENG23LA031 · BOEING 737-9 · Part 121

What the record says

Event date: 2023-06-28
Event type: Incident
Highest injury level: No injuries
Aircraft: BOEING 737-9 (N37516)
Operating rule: Part 121
Operator: UNITED AIRLINES, INC. Operator named in NTSB report
Operated by (per NTSB report): United Airlines

Probable cause

A No. 1 (left) engine fire due a fuel leak that originated from the fuel nozzle 17 b-nut connection that was not properly torqued in accordance with the aircraft maintenance manual procedure.

Source: NTSB case ENG23LA031

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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