 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
A B757-200 aural fire warning alarm sounded continuously with no fire indication; requiring the crew to disable the aural warning speaker system.
| Attributes | |
| ACN | 671606 |
| Time | |
| Date | 200509 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : sna.airport |
| State Reference | CA |
| Altitude | msl single value : 20 |
| Aircraft 1 | |
| Controlling Facilities | tower : sna.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : takeoff climbout : initial |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Experience | flight time last 90 days : 200 flight time total : 6000 flight time type : 2500 |
| ASRS Report | 671606 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 30 flight time total : 17000 flight time type : 4000 |
| ASRS Report | 671608 |
| Events | |
| Anomaly | aircraft equipment problem : less severe other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : fire warning |
| Resolutory Action | flight crew : overcame equipment problem |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
After rotation; fire warning bell came on and was on continuously during climb out; no EICAS or status messages present and all engine indications normal. After reaching safe altitude; captain directed first officer (PF) to fly airplane and handle ATC communications; while he consulted flight manual and initiated phone patch with dispatch and maintenance. Aural warning circuit breakers were pulled and warning silenced. Per maintenance; all fire detector circuit breakers were opened individually in an attempt to isolate source of fire signal. Unable to silence bell with any fire detector circuit breakers opened. All circuit breakers reset except aural warning speaker circuit breakers. Fire test ok with the exception of no aural warnings. With concurrence of maintenance; dispatch; and chief pilot; flight continued to ord and landed. I felt flight crew handled situation very well using excellent CRM for an ambiguous problem during a critical phase of flight.
Original NASA ASRS Text
Title: A B757-200 AURAL FIRE WARNING ALARM SOUNDED CONTINUOUSLY WITH NO FIRE INDICATION; REQUIRING THE CREW TO DISABLE THE AURAL WARNING SPEAKER SYS.
Narrative: AFTER ROTATION; FIRE WARNING BELL CAME ON AND WAS ON CONTINUOUSLY DURING CLBOUT; NO EICAS OR STATUS MESSAGES PRESENT AND ALL ENG INDICATIONS NORMAL. AFTER REACHING SAFE ALT; CAPT DIRECTED FO (PF) TO FLY AIRPLANE AND HANDLE ATC COMS; WHILE HE CONSULTED FLT MANUAL AND INITIATED PHONE PATCH WITH DISPATCH AND MAINT. AURAL WARNING CIRCUIT BREAKERS WERE PULLED AND WARNING SILENCED. PER MAINT; ALL FIRE DETECTOR CIRCUIT BREAKERS WERE OPENED INDIVIDUALLY IN AN ATTEMPT TO ISOLATE SOURCE OF FIRE SIGNAL. UNABLE TO SILENCE BELL WITH ANY FIRE DETECTOR CIRCUIT BREAKERS OPENED. ALL CIRCUIT BREAKERS RESET EXCEPT AURAL WARNING SPEAKER CIRCUIT BREAKERS. FIRE TEST OK WITH THE EXCEPTION OF NO AURAL WARNINGS. WITH CONCURRENCE OF MAINT; DISPATCH; AND CHIEF PLT; FLT CONTINUED TO ORD AND LANDED. I FELT FLT CREW HANDLED SITUATION VERY WELL USING EXCELLENT CRM FOR AN AMBIGUOUS PROB DURING A CRITICAL PHASE OF FLT.
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.