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A DC9-30 immediately after takeoff at 2800 ft diverted and returned to the field due to an APU fire warning caused by a shorted fire loop.
| Attributes | |
| ACN | 471350 |
| Time | |
| Date | 200004 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : ord.airport |
| State Reference | IL |
| Altitude | msl bound lower : 2000 msl bound upper : 2800 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : c90.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 30 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : takeoff |
| Route In Use | approach : visual |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 2500 flight time type : 500 |
| ASRS Report | 471350 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : flight engineer pilot : cfi |
| Experience | flight time last 90 days : 180 flight time total : 13200 flight time type : 10500 |
| ASRS Report | 471568 |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | atc equipment : conflict alert aircraft equipment other aircraft equipment : apu fire bell and light |
| Resolutory Action | aircraft : evacuated |
| Consequence | other other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
On takeoff from chicago, fire bell sounded for the APU. Checklist was accomplished for the fire and an immediate return to the airport was requested. The captain continued to fly as I accomplished the checklists. A normal approach (visual) and landing was accomplished to runway 9L at ord. We taxied clear and had the fire department visually check the exterior of the aircraft. We then received a second fire warning that would not go out. The checklist for evaluation was accomplished and all of the passenger and crew were evacuate/evacuationed without injury. The aircraft was then turned over to the fire department and maintenance. Callback conversation with reporter revealed the following information: the reporter stated the aircraft was a DC9-30 and the APU fire warning turned out to be a false warning. The reporter said maintenance found a shorted fire loop connector to be the cause of the false warning. The reporter said the airplane was evacuate/evacuationed with no injuries.
Original NASA ASRS Text
Title: A DC9-30 IMMEDIATELY AFTER TKOF AT 2800 FT DIVERTED AND RETURNED TO THE FIELD DUE TO AN APU FIRE WARNING CAUSED BY A SHORTED FIRE LOOP.
Narrative: ON TKOF FROM CHICAGO, FIRE BELL SOUNDED FOR THE APU. CHKLIST WAS ACCOMPLISHED FOR THE FIRE AND AN IMMEDIATE RETURN TO THE ARPT WAS REQUESTED. THE CAPT CONTINUED TO FLY AS I ACCOMPLISHED THE CHKLISTS. A NORMAL APCH (VISUAL) AND LNDG WAS ACCOMPLISHED TO RWY 9L AT ORD. WE TAXIED CLR AND HAD THE FIRE DEPT VISUALLY CHK THE EXTERIOR OF THE ACFT. WE THEN RECEIVED A SECOND FIRE WARNING THAT WOULD NOT GO OUT. THE CHKLIST FOR EVALUATION WAS ACCOMPLISHED AND ALL OF THE PAX AND CREW WERE EVACED WITHOUT INJURY. THE ACFT WAS THEN TURNED OVER TO THE FIRE DEPT AND MAINT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE ACFT WAS A DC9-30 AND THE APU FIRE WARNING TURNED OUT TO BE A FALSE WARNING. THE RPTR SAID MAINT FOUND A SHORTED FIRE LOOP CONNECTOR TO BE THE CAUSE OF THE FALSE WARNING. THE RPTR SAID THE AIRPLANE WAS EVACED WITH NO INJURIES.
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.