An MD11 experienced a fire in a wire bundle located 12 inches aft of the forward cargo door upper fr...

Attributes
ACN	431017
Time
Date	199902
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz
State Reference	US
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Navigation In Use	Other Other
Flight Phase	other
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
ASRS Report	431017
Person 2
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
ASRS Report	431018
Events
Anomaly	aircraft equipment problem : critical non adherence : published procedure non adherence : far other anomaly other
Independent Detector	other other : unspecified
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Air Traffic Incident	other

Narrative:

Possible problems in aircraft xyz wiring after a fire in the wire bundle. Callback conversation with reporter revealed the following information: the reporter stated the MD11 was parked outside of the hangar where the wiring work was accomplished and was pwred with a gpu. The reporter said the aircraft was moved into the hangar where it was found the aircraft would not accept ground power, and in the process of troubleshooting the ground power circuit, the smoldering wire bundle was discovered. The reporter stated the cause appeared to be a wire shorted to a bundle clamp when installed improperly by pushing it through the clamped bundle, instead of opening the clamp and installing the wire. The reporter said the wire insulation is brittle and may have been stripped off when pushed through the bundle. The reporter said 14 wires had to be replaced, and the circuits involved included the #3 engine fuel shutoff valve wiring, passenger entertainment wiring, and some spare wires not used. The reporter stated some circuit breakers tripped and some stayed set.

Original NASA ASRS Text

Title: AN MD11 EXPERIENCED A FIRE IN A WIRE BUNDLE LOCATED 12 INCHES AFT OF THE FORWARD CARGO DOOR UPPER FRAME BELOW THE CABIN FLOOR CAUSED BY A RECENTLY INSTALLED WIRE SHORTED TO THE BUNDLE CLAMP.

Narrative: POSSIBLE PROBS IN ACFT XYZ WIRING AFTER A FIRE IN THE WIRE BUNDLE. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE MD11 WAS PARKED OUTSIDE OF THE HANGAR WHERE THE WIRING WORK WAS ACCOMPLISHED AND WAS PWRED WITH A GPU. THE RPTR SAID THE ACFT WAS MOVED INTO THE HANGAR WHERE IT WAS FOUND THE ACFT WOULD NOT ACCEPT GND PWR, AND IN THE PROCESS OF TROUBLESHOOTING THE GND PWR CIRCUIT, THE SMOLDERING WIRE BUNDLE WAS DISCOVERED. THE RPTR STATED THE CAUSE APPEARED TO BE A WIRE SHORTED TO A BUNDLE CLAMP WHEN INSTALLED IMPROPERLY BY PUSHING IT THROUGH THE CLAMPED BUNDLE, INSTEAD OF OPENING THE CLAMP AND INSTALLING THE WIRE. THE RPTR SAID THE WIRE INSULATION IS BRITTLE AND MAY HAVE BEEN STRIPPED OFF WHEN PUSHED THROUGH THE BUNDLE. THE RPTR SAID 14 WIRES HAD TO BE REPLACED, AND THE CIRCUITS INVOLVED INCLUDED THE #3 ENG FUEL SHUTOFF VALVE WIRING, PAX ENTERTAINMENT WIRING, AND SOME SPARE WIRES NOT USED. THE RPTR STATED SOME CIRCUIT BREAKERS TRIPPED AND SOME STAYED SET.

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.

An MD11 experienced a fire in a wire bundle located 12 inches aft of the forward cargo door upper frame below the cabin floor caused by a recently installed wire shorted to the bundle clamp.