<< >> NASA ASRS Report 374284, July 1997

Pilot mechanic of an small transport twin experienced a fire of the right engine during a maintenance ground run to test uneven output of the engines. Aircraft was substantially damaged by fire. There were no injuries. Fuel leak is suspected of causing the fire.

Attributes
ACN	374284
Time
Date	199707
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz
State Reference	US
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air taxi
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 135
Flight Phase	ground : holding ground other : taxi
Flight Plan	None
Person 1
Affiliation	company : air taxi
Function	other personnel other
Qualification	other other : other pilot : commercial pilot : instrument
Experience	flight time last 90 days : 30 flight time total : 750
ASRS Report	374284
Person 2
Affiliation	government : faa
Function	controller : ground
Qualification	controller : non radar
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Consequence	other Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Run-up initiated to test left and right turbo outputs and right engine fuel pressure. Power runs showed left engine would require turbo adjust as well as right engine turbo. Right engine fuel pressure still fluctuating although would stabilize under left xfeed conditions. Determined more maintenance needed. While talking to ground frequency, noticed flames right engine. Turned off boost pumps, mixture control, and fuel tanks, exited aircraft which was substantially damaged by fire. At this point cause unknown. Recommendation: do short idle leak test and check for leaks (fuel and oil) with engines off before commencing long power runs.

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Original NASA ASRS Text

Title: PLT MECH OF AN SMT TWIN EXPERIENCED A FIRE OF THE R ENG DURING A MAINT GND RUN TO TEST UNEVEN OUTPUT OF THE ENGS. ACFT WAS SUBSTANTIALLY DAMAGED BY FIRE. THERE WERE NO INJURIES. FUEL LEAK IS SUSPECTED OF CAUSING THE FIRE.

Narrative: RUN-UP INITIATED TO TEST L AND R TURBO OUTPUTS AND R ENG FUEL PRESSURE. PWR RUNS SHOWED L ENG WOULD REQUIRE TURBO ADJUST AS WELL AS R ENG TURBO. R ENG FUEL PRESSURE STILL FLUCTUATING ALTHOUGH WOULD STABILIZE UNDER L XFEED CONDITIONS. DETERMINED MORE MAINT NEEDED. WHILE TALKING TO GND FREQ, NOTICED FLAMES R ENG. TURNED OFF BOOST PUMPS, MIXTURE CTL, AND FUEL TANKS, EXITED ACFT WHICH WAS SUBSTANTIALLY DAMAGED BY FIRE. AT THIS POINT CAUSE UNKNOWN. RECOMMENDATION: DO SHORT IDLE LEAK TEST AND CHK FOR LEAKS (FUEL AND OIL) WITH ENGS OFF BEFORE COMMENCING LONG PWR RUNS.

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.