An medium large transport air carrier aircraft had a generator failure followed by a false fire warning in the APU, the aircraft landed without further problems.

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Attributes
ACN	211902
Time
Date	199206
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : shb
State Reference	IN
Altitude	msl bound lower : 23000 msl bound upper : 23000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zid
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 200 flight time total : 15000 flight time type : 400
ASRS Report	211902
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 200 flight time total : 7000 flight time type : 1500
ASRS Report	211673
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	controller : issued new clearance flight crew : declared emergency flight crew : overcame equipment problem other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

While in cruise #2 engine generator shutdown and showed CSD low oil pressure light. Procedures followed to start the APU and place on the failed bus. About 5 mins later we got a fire warning on the APU. Accomplished APU fire shutdown procedure but fire indicator light would not go out. Declared emergency and landed at cvg. Tower reported no smoke or fire visible so did not evacuate/evacuation passenger. APU section also inspected by fire rescue crews reporting no indication fire.

Original NASA ASRS Text

Title: AN MLG AIR CARRIER ACFT HAD A GENERATOR FAILURE FOLLOWED BY A FALSE FIRE WARNING IN THE APU, THE ACFT LANDED WITHOUT FURTHER PROBLEMS.

Narrative: WHILE IN CRUISE #2 ENG GENERATOR SHUTDOWN AND SHOWED CSD LOW OIL PRESSURE LIGHT. PROCS FOLLOWED TO START THE APU AND PLACE ON THE FAILED BUS. ABOUT 5 MINS LATER WE GOT A FIRE WARNING ON THE APU. ACCOMPLISHED APU FIRE SHUTDOWN PROC BUT FIRE INDICATOR LIGHT WOULD NOT GO OUT. DECLARED EMER AND LANDED AT CVG. TWR RPTED NO SMOKE OR FIRE VISIBLE SO DID NOT EVAC PAX. APU SECTION ALSO INSPECTED BY FIRE RESCUE CREWS RPTING NO INDICATION FIRE.

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.