|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||0001 To 0600|
|Locale Reference||airport : zzz.airport|
|Altitude||agl single value : 0|
|Operator||common carrier : air carrier|
|Make Model Name||MD-11|
|Operating Under FAR Part||Part 121|
|Flight Phase||landing : roll|
|Affiliation||company : air carrier|
|Function||flight crew : first officer|
|Experience||flight time last 90 days : 147|
flight time total : 7846
flight time type : 147
|Affiliation||company : air carrier|
|Function||flight crew : captain|
oversight : pic
|Experience||flight time last 90 days : 125|
flight time total : 12000
flight time type : 1000
|Anomaly||aircraft equipment problem : less severe|
|Independent Detector||aircraft equipment other aircraft equipment : electronic annunciator display|
other flight crewa
other flight crewb
|Resolutory Action||aircraft : equipment problem dissipated|
During rollout at less than 80 KTS; the tri-tone horn sounded with engine #1 fire; engine #2 fire; and APU fire displayed rapidly and intermittently on the ead. This lasted for a period of about 5-8 seconds. There were also various cue lights that intermittently and rapidly illuminated on the system display control panel in association with other level 1 and 2 annunciations on the ead that occurred too quickly to properly identify. Just before clearing the runway; all indications on the ead were clear with the exception of brake differential temperature and the hydraulic system had reverted to manual mode. On reviewing the logbook prior to departure; it was noted that these sort of erroneous indications had occurred on the previous 2 flts. Based on this knowledge; we made a decision as a crew not to comply with the QRH checklist for the level 3 fire warnings. It seemed that the fire warnings were erroneous and we also noted that the lights in the fire handles and fuel switches had never illuminated. It is possible/likely that this event was caused by a faulty control box in the fire detection system since discussions with maintenance personnel and the logbook showed that control boxes between engines and the APU had been swapped for troubleshooting purposes. Callback conversation with reporter revealed the following information: reporter stated that the ead (electronic annunciator display) fire warnings were brief. Other cockpit indications for the engines and APU were normal; so the temporary and erroneous fire warning were ignored. The hydraulic and brake temperature indications may have been valid.
Original NASA ASRS Text
Title: MD-11 ANNUNCIATED INTERMITTENT ENG 1; ENG 2; AND APU FIRE WARNINGS DURING ROLLOUT. FLT CREW DEEMED THE WARNINGS ERRONEOUS AND TAXIED TO PARKING.
Narrative: DURING ROLLOUT AT LESS THAN 80 KTS; THE TRI-TONE HORN SOUNDED WITH ENG #1 FIRE; ENG #2 FIRE; AND APU FIRE DISPLAYED RAPIDLY AND INTERMITTENTLY ON THE EAD. THIS LASTED FOR A PERIOD OF ABOUT 5-8 SECONDS. THERE WERE ALSO VARIOUS CUE LIGHTS THAT INTERMITTENTLY AND RAPIDLY ILLUMINATED ON THE SYS DISPLAY CTL PANEL IN ASSOCIATION WITH OTHER LEVEL 1 AND 2 ANNUNCIATIONS ON THE EAD THAT OCCURRED TOO QUICKLY TO PROPERLY IDENT. JUST BEFORE CLRING THE RWY; ALL INDICATIONS ON THE EAD WERE CLR WITH THE EXCEPTION OF BRAKE DIFFERENTIAL TEMP AND THE HYD SYS HAD REVERTED TO MANUAL MODE. ON REVIEWING THE LOGBOOK PRIOR TO DEP; IT WAS NOTED THAT THESE SORT OF ERRONEOUS INDICATIONS HAD OCCURRED ON THE PREVIOUS 2 FLTS. BASED ON THIS KNOWLEDGE; WE MADE A DECISION AS A CREW NOT TO COMPLY WITH THE QRH CHKLIST FOR THE LEVEL 3 FIRE WARNINGS. IT SEEMED THAT THE FIRE WARNINGS WERE ERRONEOUS AND WE ALSO NOTED THAT THE LIGHTS IN THE FIRE HANDLES AND FUEL SWITCHES HAD NEVER ILLUMINATED. IT IS POSSIBLE/LIKELY THAT THIS EVENT WAS CAUSED BY A FAULTY CTL BOX IN THE FIRE DETECTION SYS SINCE DISCUSSIONS WITH MAINT PERSONNEL AND THE LOGBOOK SHOWED THAT CTL BOXES BTWN ENGS AND THE APU HAD BEEN SWAPPED FOR TROUBLESHOOTING PURPOSES. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: REPORTER STATED THAT THE EAD (ELECTRONIC ANNUNCIATOR DISPLAY) FIRE WARNINGS WERE BRIEF. OTHER COCKPIT INDICATIONS FOR THE ENGS AND APU WERE NORMAL; SO THE TEMPORARY AND ERRONEOUS FIRE WARNING WERE IGNORED. THE HYD AND BRAKE TEMP INDICATIONS MAY HAVE BEEN VALID.
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.