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A B737-200C while parked and being loaded had a right engine fire warning. Fire handle illuminated and bell. Found shorted engine fire sensing loop.
| Attributes | |
| ACN | 646302 |
| Time | |
| Date | 200502 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : parked |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 100 flight time total : 11400 flight time type : 7900 |
| ASRS Report | 646302 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | aircraft equipment other aircraft equipment : fire handle light and bell other flight crewa other flight crewb |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft Maintenance Human Performance |
| Primary Problem | Aircraft |
Narrative:
After we parked in ZZZ; the crew left the plane to use the restrooms outside the hangar area. When we returned; the cargo workers were ready to load the aircraft; and the crew was ready to stand in the back and monitor the loading. The crew looked in the flight deck to see the #2 fire handle illuminated and the fire bell ringing. We do not know how long the light and bell were on for; because it is very loud in the back of the plane and the workers did not hear the bell. I silenced the bell and pulled the fire handle while the first officer went down to look at the engine. The handle light remained on and then eventually went out. Then the fire light and bell kept going on and off multiple times. It appeared that there was some sort of short in the system. There was a mechanic available and found the short was caused by the cowling smashing the wiring.
Original NASA ASRS Text
Title: A B737-200C WHILE PARKED AND BEING LOADED HAD A R ENG FIRE WARNING. FIRE HANDLE ILLUMINATED AND BELL. FOUND SHORTED ENG FIRE SENSING LOOP.
Narrative: AFTER WE PARKED IN ZZZ; THE CREW LEFT THE PLANE TO USE THE RESTROOMS OUTSIDE THE HANGAR AREA. WHEN WE RETURNED; THE CARGO WORKERS WERE READY TO LOAD THE ACFT; AND THE CREW WAS READY TO STAND IN THE BACK AND MONITOR THE LOADING. THE CREW LOOKED IN THE FLT DECK TO SEE THE #2 FIRE HANDLE ILLUMINATED AND THE FIRE BELL RINGING. WE DO NOT KNOW HOW LONG THE LIGHT AND BELL WERE ON FOR; BECAUSE IT IS VERY LOUD IN THE BACK OF THE PLANE AND THE WORKERS DID NOT HEAR THE BELL. I SILENCED THE BELL AND PULLED THE FIRE HANDLE WHILE THE FO WENT DOWN TO LOOK AT THE ENG. THE HANDLE LIGHT REMAINED ON AND THEN EVENTUALLY WENT OUT. THEN THE FIRE LIGHT AND BELL KEPT GOING ON AND OFF MULTIPLE TIMES. IT APPEARED THAT THERE WAS SOME SORT OF SHORT IN THE SYS. THERE WAS A MECH AVAILABLE AND FOUND THE SHORT WAS CAUSED BY THE COWLING SMASHING THE WIRING.
Data retrieved from NASA's ASRS site as of January 2009 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.