Aircraft equipment problem. False APU fire warning. Flight diverted, emergency declared.

Attributes
ACN	339815
Time
Date	199606
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : cos
State Reference	CO
Altitude	msl bound lower : 33000 msl bound upper : 33000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zdv
Operator	common carrier : air carrier
Make Model Name	B737-200
Operating Under FAR Part	Part 121
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : flight engineer pilot : atp pilot : commercial
Experience	flight time last 90 days : 150 flight time total : 15000 flight time type : 450
ASRS Report	339815
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa
Resolutory Action	flight crew : declared emergency none taken : unable other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

APU. Fire warning. ATC emergency declared with diversionary landing at cos. Callback conversation with reporter revealed the following information: reporter captain was contacted to obtain more information concerning the APU fire incident. En route to another airport they received the APU fire warning. Unable to know what the situation was, they diverted and landed uneventfully. Mechanics found a short in the fire warning system, deferred the APU inoperative and the flight crew ferried the aircraft to den for repair. Reporter confirmed aircraft as B737-200.

Original NASA ASRS Text

Title: ACFT EQUIP PROB. FALSE APU FIRE WARNING. FLT DIVERTED, EMER DECLARED.

Narrative: APU. FIRE WARNING. ATC EMER DECLARED WITH DIVERSIONARY LNDG AT COS. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR CAPT WAS CONTACTED TO OBTAIN MORE INFO CONCERNING THE APU FIRE INCIDENT. ENRTE TO ANOTHER ARPT THEY RECEIVED THE APU FIRE WARNING. UNABLE TO KNOW WHAT THE SIT WAS, THEY DIVERTED AND LANDED UNEVENTFULLY. MECHS FOUND A SHORT IN THE FIRE WARNING SYS, DEFERRED THE APU INOP AND THE FLC FERRIED THE ACFT TO DEN FOR REPAIR. RPTR CONFIRMED ACFT AS B737-200.

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.