<< >> NASA ASRS Report 392931, January 1998

An L1011-500 at cruise FL310 experienced a #3 engine fire warning and engine was shut down and bottles fired. Warning was false caused by corroded pins on a fire loop connector.

Attributes
ACN	392931
Time
Date	199801
Day	Thu
Local Time Of Day	0001 To 0600
Place
Locale Reference	atc facility : tire
State Reference	FO
Altitude	msl bound lower : 31000 msl bound upper : 31000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : fggx
Operator	common carrier : air carrier
Make Model Name	L-1011-500 Series
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	cruise other
Route In Use	enroute : atlantic enroute airway : fggx
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : instrument pilot : flight engineer pilot : commercial
Experience	flight time last 90 days : 225 flight time total : 15000 flight time type : 4300
ASRS Report	392931
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa other other : unspecified cockpit
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Had fire warning #3 engine -- shut down -- fired #1 fire bottle. Light still on, fired 2ND fire bottle. Light still on then went off. Came back on several mins later for a couple of mins. So made several visual checks, could not see anything. Contacted company flight control -- decided to fly to destination (str) (2 hours away), overflying man, lgw, fra, ams and muc. The flight deck and cabin crew did a great job. Only radio contact at time was HF. Took time to talk to someone. Satcom would have been great. Should have talked to other on track. Did notify shanwick on HF about engine shutdown and slower mach from .84 to .805. Callback conversation with reporter revealed the following information: the reporter stated the fire warning was false and caused by corroded pins on the engine fire warning sensor loop.

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Original NASA ASRS Text

Title: AN L1011-500 AT CRUISE FL310 EXPERIENCED A #3 ENG FIRE WARNING AND ENG WAS SHUT DOWN AND BOTTLES FIRED. WARNING WAS FALSE CAUSED BY CORRODED PINS ON A FIRE LOOP CONNECTOR.

Narrative: HAD FIRE WARNING #3 ENG -- SHUT DOWN -- FIRED #1 FIRE BOTTLE. LIGHT STILL ON, FIRED 2ND FIRE BOTTLE. LIGHT STILL ON THEN WENT OFF. CAME BACK ON SEVERAL MINS LATER FOR A COUPLE OF MINS. SO MADE SEVERAL VISUAL CHKS, COULD NOT SEE ANYTHING. CONTACTED COMPANY FLT CTL -- DECIDED TO FLY TO DEST (STR) (2 HRS AWAY), OVERFLYING MAN, LGW, FRA, AMS AND MUC. THE FLT DECK AND CABIN CREW DID A GREAT JOB. ONLY RADIO CONTACT AT TIME WAS HF. TOOK TIME TO TALK TO SOMEONE. SATCOM WOULD HAVE BEEN GREAT. SHOULD HAVE TALKED TO OTHER ON TRACK. DID NOTIFY SHANWICK ON HF ABOUT ENG SHUTDOWN AND SLOWER MACH FROM .84 TO .805. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE FIRE WARNING WAS FALSE AND CAUSED BY CORRODED PINS ON THE ENG FIRE WARNING SENSOR LOOP.

Data retrieved from NASA's ASRS site as of July 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.