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MD80 flight crew initially released brakes and then inadertantly reset brakes. When tug driver called for pushback flight crew thought brakes were released and pushback was authorized resulting in damage to tow bar and aircraft.
| Attributes | |
| ACN | 435440 |
| Time | |
| Date | 199904 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : dfw.airport |
| State Reference | TX |
| Altitude | agl single value : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Super 80 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : pushback |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 435440 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : instrument pilot : commercial |
| ASRS Report | 435439 |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : company policies |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | none taken : unable |
| Consequence | other |
| Supplementary | |
| Problem Areas | Company Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
After completing just prior to starting checklist, communication was established with tug driver. Brakes were then released. First officer began to call for pushback clearance when agent returned jetbridge to aircraft and boarded 2 more passenger. Another cabin ready report was received. As first officer was in midst of getting pushback clearance, agent again returned jetbridge to aircraft to board 2 more passenger. Another cabin ready report was received. First officer said we were cleared to push. I told ground, brakes were released and cleared to push. I immediately realized brakes were parked and called 3 or 4 times to stop push. Tow bar broke and aircraft was damaged. Neither I nor copilot can remember when brakes were re-parked after initial brake release. I suspect I parked them while I was confirming they were released.
Original NASA ASRS Text
Title: MD80 FLC INITIALLY RELEASED BRAKES AND THEN INADERTANTLY RESET BRAKES. WHEN TUG DRIVER CALLED FOR PUSHBACK FLIGHT CREW THOUGHT BRAKES WERE RELEASED AND PUSHBACK WAS AUTHORIZED RESULTING IN DAMAGE TO TOW BAR AND ACFT.
Narrative: AFTER COMPLETING JUST PRIOR TO STARTING CHKLIST, COM WAS ESTABLISHED WITH TUG DRIVER. BRAKES WERE THEN RELEASED. FO BEGAN TO CALL FOR PUSHBACK CLRNC WHEN AGENT RETURNED JETBRIDGE TO ACFT AND BOARDED 2 MORE PAX. ANOTHER CABIN READY RPT WAS RECEIVED. AS FO WAS IN MIDST OF GETTING PUSHBACK CLRNC, AGENT AGAIN RETURNED JETBRIDGE TO ACFT TO BOARD 2 MORE PAX. ANOTHER CABIN READY RPT WAS RECEIVED. FO SAID WE WERE CLRED TO PUSH. I TOLD GND, BRAKES WERE RELEASED AND CLRED TO PUSH. I IMMEDIATELY REALIZED BRAKES WERE PARKED AND CALLED 3 OR 4 TIMES TO STOP PUSH. TOW BAR BROKE AND ACFT WAS DAMAGED. NEITHER I NOR COPLT CAN REMEMBER WHEN BRAKES WERE RE-PARKED AFTER INITIAL BRAKE RELEASE. I SUSPECT I PARKED THEM WHILE I WAS CONFIRMING THEY WERE RELEASED.
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.