NTSB Identification: SEA90IA161.
The docket is stored on NTSB microfiche number 43224.
Scheduled 14 CFR operation of CONTINENTAL AIRLINES
Incident occurred Sunday, August 12, 1990 in BELGRADE, MT
Probable Cause Approval Date: 12/30/1992
Aircraft: BOEING 727-224, registration: N69735
Injuries: 157 Uninjured.

NTSB investigators used data provided by various sources and may not have traveled in support of this investigation to prepare this aircraft incident report.

AT THE BEGINNING OF A FLIGHT, JUST AFTER TAKEOFF, THE FIRE WARNING LIGHT ILLUMINATED FOR THE NUMBER 3 ENGINE. THE FLIGHT CREW PERFORMED THE APPROPRIATE EMERGENCY PROCEDURES AND RETURNED FOR LANDING. AFTER LANDING, FIRE CREWS EXTINGUISHED THE STILL BURNING FIRE THAT WAS CONFINED TO THE ENGINE COMPARTMENT. INSPECTION OF THE ENGINE REVEALED THAT THE STARTER EXPERIENCED AN INFLIGHT FAILURE. THE STARTER CONTROL VALVE WAS EXAMINED AND FOUND TO OPERATE NORMALLY AT THE TIME OF THE INSPECTION.

The National Transportation Safety Board determines the probable cause(s) of this incident to be:

THE MALFUNCTION OF THE STARTER CONTROL VALVE.

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