<< >> NASA ASRS Report 106509, March 1989

Air carrier large transport engine fire warning at cruise altitude. Descended, dumped fuel, then diverted to alternate.

Attributes
ACN	106509
Time
Date	198903
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : txk
State Reference	TX
Altitude	msl bound lower : 31000 msl bound upper : 31000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : czfw
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : instrument pilot : atp
Experience	flight time last 90 days : 75 flight time total : 13000 flight time type : 7800
ASRS Report	106509
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : private pilot : instrument pilot : commercial
Experience	flight time last 90 days : 162 flight time total : 8300 flight time type : 2100
ASRS Report	106504
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : declared emergency none taken : unable other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

At cruise altitude 310, we had an intermittent #2 fire warning. We performed engine fire and severe damage checklist. When throttle was retarded, warning light extinguished, so we left engine running. We requested a lower altitude and direct dfw. After talking to dispatch coordination we dumped fuel. In descent about FL290 the #2 fire warning light illuminated momentarily, then went out. We elected to go to shv at that time because it was nearer. The #2 fire warning stayed out, so we felt that residual heat had caused the alarm, so we elected to continue to dfw. The #2 fire warning came on again. At this point we shut the engine down and the light went out for a few seconds, then came back on. We fired the 1ST fire bottle and waited. The light went out and then came on again. We fired the second bottle, but the light stayed on until the battery switch was turned off after landing. Landing was normal at majors field.

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Original NASA ASRS Text

Title: ACR LGT ENGINE FIRE WARNING AT CRUISE ALT. DESCENDED, DUMPED FUEL, THEN DIVERTED TO ALTERNATE.

Narrative: AT CRUISE ALT 310, WE HAD AN INTERMITTENT #2 FIRE WARNING. WE PERFORMED ENGINE FIRE AND SEVERE DAMAGE CHKLIST. WHEN THROTTLE WAS RETARDED, WARNING LIGHT EXTINGUISHED, SO WE LEFT ENGINE RUNNING. WE REQUESTED A LOWER ALT AND DIRECT DFW. AFTER TALKING TO DISPATCH COORD WE DUMPED FUEL. IN DSCNT ABOUT FL290 THE #2 FIRE WARNING LIGHT ILLUMINATED MOMENTARILY, THEN WENT OUT. WE ELECTED TO GO TO SHV AT THAT TIME BECAUSE IT WAS NEARER. THE #2 FIRE WARNING STAYED OUT, SO WE FELT THAT RESIDUAL HEAT HAD CAUSED THE ALARM, SO WE ELECTED TO CONTINUE TO DFW. THE #2 FIRE WARNING CAME ON AGAIN. AT THIS POINT WE SHUT THE ENGINE DOWN AND THE LIGHT WENT OUT FOR A FEW SECONDS, THEN CAME BACK ON. WE FIRED THE 1ST FIRE BOTTLE AND WAITED. THE LIGHT WENT OUT AND THEN CAME ON AGAIN. WE FIRED THE SECOND BOTTLE, BUT THE LIGHT STAYED ON UNTIL THE BATTERY SWITCH WAS TURNED OFF AFTER LNDG. LNDG WAS NORMAL AT MAJORS FIELD.

Data retrieved from NASA's ASRS site as of August 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.