Return land slc after receiving an APU fire warning.

Attributes
ACN	178269
Time
Date	199105
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : slc
State Reference	UT
Altitude	msl bound lower : 11000 msl bound upper : 11000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : slc
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 220 flight time total : 12000 flight time type : 2300
ASRS Report	178269
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : cfi pilot : atp
Experience	flight time last 90 days : 200 flight time total : 14700
ASRS Report	178465
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

During climb out, with the APU shut down, we got a fire warning and had difficulty deactivating the warning system. This aircraft had a history of false warnings and had been worked on by maintenance personnel during the overnight layover. The emergency checklist was accomplished, but we still received fire warnings. The aircraft was returned to slc and maintenance did determine that it was a false warning again.

Original NASA ASRS Text

Title: RETURN LAND SLC AFTER RECEIVING AN APU FIRE WARNING.

Narrative: DURING CLBOUT, WITH THE APU SHUT DOWN, WE GOT A FIRE WARNING AND HAD DIFFICULTY DEACTIVATING THE WARNING SYS. THIS ACFT HAD A HISTORY OF FALSE WARNINGS AND HAD BEEN WORKED ON BY MAINT PERSONNEL DURING THE OVERNIGHT LAYOVER. THE EMER CHKLIST WAS ACCOMPLISHED, BUT WE STILL RECEIVED FIRE WARNINGS. THE ACFT WAS RETURNED TO SLC AND MAINT DID DETERMINE THAT IT WAS A FALSE WARNING AGAIN.

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.