NTSB Identification: CHI88IA045.
The docket is stored on NTSB microfiche number 37738.
Scheduled 14 CFR operation of SIMMONS AIRLINES
Incident occurred Monday, January 18, 1988 in WATERLOO, IA
Probable Cause Approval Date: 01/25/1990
Aircraft: AEROSPATIALE ATR-42, registration: N421MQ
Injuries: 6 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.

LEFT ENGINE FIRE WARNING LIGHT ILLUMINATED SHORTLY AFTER REACHING CRUISE ALTITUDE. ENGINE FIRE BOTTLE WAS DISCHARGED AND THE FIRE LIGHT WENT OUT. CREW THEN DECLARED AN EMERGENCY AND RETURNED TO THE DEPARTURE AIRPORT. THREE LEAKING FUEL NOZZLES AND PORTIONS OF THE ENGINE WIRING HARNESS WERE SUBSEQUENTLY REPLACED.

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

FLUID,FUEL..LEAK

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

IGNITION SYSTEM,IGNITION HARNESS..IMPROPER

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