Medium large transport has APU fire while at gate. Shut down, evacuated aircraft.

Attributes
ACN	204831
Time
Date	199203
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : dfw
State Reference	TX
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	ground : preflight
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 130 flight time total : 4100 flight time type : 1000
ASRS Report	204831
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : declared emergency other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

At gate I heard unusual vibration followed by electricity dropping off the line (APU generator was in use). APU shutdown followed by APU fire warning. Emergency checklist was accomplished and passengers evacuate/evacuationed through the main exit since we were at the gate.

Original NASA ASRS Text

Title: MLG HAS APU FIRE WHILE AT GATE. SHUT DOWN, EVACUATED ACFT.

Narrative: AT GATE I HEARD UNUSUAL VIBRATION FOLLOWED BY ELECTRICITY DROPPING OFF THE LINE (APU GENERATOR WAS IN USE). APU SHUTDOWN FOLLOWED BY APU FIRE WARNING. EMER CHKLIST WAS ACCOMPLISHED AND PAXS EVACED THROUGH THE MAIN EXIT SINCE WE WERE AT THE GATE.

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.