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Aircraft experienced intermittent fire bell activation immediately after takeoff. Return to departure airport.
| Attributes | |
| ACN | 120567 |
| Time | |
| Date | 198908 |
| Day | Tue |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : yyz |
| State Reference | ON |
| Altitude | msl bound lower : 3000 msl bound upper : 3000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : yyz |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | climbout : initial descent : approach landing other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 15000 flight time type : 11000 |
| ASRS Report | 120567 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : declared emergency flight crew : overcame equipment problem none taken : anomaly accepted other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
Narrative:
Shortly after flaps up on takeoff we experienced a flicker of the engine fire warning bell, but were unable to determine which light. We suspected #1 engine because of a previous write-up, but could not confirm. We made visibility checks on #1 and #3 engines, revealing no problems, and made an immediate smooth overweight landing on runway 24R at yyz. On roll-out we experienced a definite flicker of #1 engine fire warning light and bell. We executed the fire checklist and had the fire department make a visibility check. Since no problems were revealed we taxied to the gate. The maintenance fix was to replace the 4 fire detected loops.
Original NASA ASRS Text
Title: ACFT EXPERIENCED INTERMITTENT FIRE BELL ACTIVATION IMMEDIATELY AFTER TKOF. RETURN TO DEP ARPT.
Narrative: SHORTLY AFTER FLAPS UP ON TKOF WE EXPERIENCED A FLICKER OF THE ENG FIRE WARNING BELL, BUT WERE UNABLE TO DETERMINE WHICH LIGHT. WE SUSPECTED #1 ENG BECAUSE OF A PREVIOUS WRITE-UP, BUT COULD NOT CONFIRM. WE MADE VIS CHKS ON #1 AND #3 ENGS, REVEALING NO PROBS, AND MADE AN IMMEDIATE SMOOTH OVERWEIGHT LNDG ON RWY 24R AT YYZ. ON ROLL-OUT WE EXPERIENCED A DEFINITE FLICKER OF #1 ENG FIRE WARNING LIGHT AND BELL. WE EXECUTED THE FIRE CHKLIST AND HAD THE FIRE DEPT MAKE A VIS CHK. SINCE NO PROBS WERE REVEALED WE TAXIED TO THE GATE. THE MAINT FIX WAS TO REPLACE THE 4 FIRE DETECTED LOOPS.
Data retrieved from NASA's ASRS site as of August 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.