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En route cruise #1 engine fire warning, engine shutdown with both extinguishers applied, but light stayed on. Emergency declared, aircraft diverted and landed uneventfully. Faulty detector loop discovered.
| Attributes | |
| ACN | 324863 |
| Time | |
| Date | 199512 |
| Day | Sat |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : muha |
| State Reference | FO |
| Altitude | msl bound lower : 29000 msl bound upper : 29000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B727-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other |
| Route In Use | enroute airway : ua301 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : flight engineer pilot : commercial pilot : cfi |
| Experience | flight time last 90 days : 70 flight time total : 3100 flight time type : 700 |
| ASRS Report | 324863 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 8000 flight time type : 6000 |
| ASRS Report | 324952 |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : declared emergency none taken : unable other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
Narrative:
Departed mbj for msp. Just prior to leveloff, engine fire warning #1 engine came on. Captain turned the aircraft over to me, worked with the so following the communication procedures, shut down engine #1, fired both fire bottles but the fire warning light remained on. We declared an emergency with havana center, requested lower and a turn back to mbj which we received. After captain finished the emergency checklist he took over control of the aircraft and we returned and landed safely at mbj. Other than the fire warning bell and light we had no other fire warning indication both on the instruments and visually. After landing the B loop of the fire detection system was found to have a short in it causing the false fire indication warning.
Original NASA ASRS Text
Title: ENRTE CRUISE #1 ENG FIRE WARNING, ENG SHUTDOWN WITH BOTH EXTINGUISHERS APPLIED, BUT LIGHT STAYED ON. EMER DECLARED, ACFT DIVERTED AND LANDED UNEVENTFULLY. FAULTY DETECTOR LOOP DISCOVERED.
Narrative: DEPARTED MBJ FOR MSP. JUST PRIOR TO LEVELOFF, ENG FIRE WARNING #1 ENG CAME ON. CAPT TURNED THE ACFT OVER TO ME, WORKED WITH THE SO FOLLOWING THE COM PROCS, SHUT DOWN ENG #1, FIRED BOTH FIRE BOTTLES BUT THE FIRE WARNING LIGHT REMAINED ON. WE DECLARED AN EMER WITH HAVANA CTR, REQUESTED LOWER AND A TURN BACK TO MBJ WHICH WE RECEIVED. AFTER CAPT FINISHED THE EMER CHKLIST HE TOOK OVER CTL OF THE ACFT AND WE RETURNED AND LANDED SAFELY AT MBJ. OTHER THAN THE FIRE WARNING BELL AND LIGHT WE HAD NO OTHER FIRE WARNING INDICATION BOTH ON THE INSTS AND VISUALLY. AFTER LNDG THE B LOOP OF THE FIRE DETECTION SYS WAS FOUND TO HAVE A SHORT IN IT CAUSING THE FALSE FIRE INDICATION WARNING.
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.