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A B737-200, after pushback and 'brakes set' command, rolled forward striking the disconnected towbar.
| Attributes | |
| ACN | 406987 |
| Time | |
| Date | 199807 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : stl |
| State Reference | MO |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : preflight ground other : taxi |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 210 flight time total : 16000 flight time type : 9000 |
| ASRS Report | 406987 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | conflict : ground critical non adherence : published procedure non adherence : far |
| Independent Detector | other flight crewa other other : unspecified |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | Pilot Deviation |
Narrative:
The pushback communication was conducted using company normal pushback procedures. While the airplane was being pushed back the ground crew cleared us to start engines. During the second engine start procedure I noticed the flight control master caution light illuminate. With the pushback complete the ground crew instructed pushback complete set parking brake. This transmission was accompanied by a very high level of background engine noise, and painful with the headset on. I set the parking brake, responded parking brake set, disconnect, pulled my headset back off my ears to protect them from the next transmission then glanced to the fic control portion at the overhead panel to determine the cause of the caution light (feel differential pressure). At this time both the first officer and I noticed the airplane drifting, and I stepped on the brakes as the airplane struck the towbar. I contacted the ground crew and returned to the gate.
Original NASA ASRS Text
Title: A B737-200, AFTER PUSHBACK AND 'BRAKES SET' COMMAND, ROLLED FORWARD STRIKING THE DISCONNECTED TOWBAR.
Narrative: THE PUSHBACK COM WAS CONDUCTED USING COMPANY NORMAL PUSHBACK PROCS. WHILE THE AIRPLANE WAS BEING PUSHED BACK THE GND CREW CLRED US TO START ENGS. DURING THE SECOND ENG START PROC I NOTICED THE FLT CTL MASTER CAUTION LIGHT ILLUMINATE. WITH THE PUSHBACK COMPLETE THE GND CREW INSTRUCTED PUSHBACK COMPLETE SET PARKING BRAKE. THIS XMISSION WAS ACCOMPANIED BY A VERY HIGH LEVEL OF BACKGROUND ENG NOISE, AND PAINFUL WITH THE HEADSET ON. I SET THE PARKING BRAKE, RESPONDED PARKING BRAKE SET, DISCONNECT, PULLED MY HEADSET BACK OFF MY EARS TO PROTECT THEM FROM THE NEXT XMISSION THEN GLANCED TO THE FIC CTL PORTION AT THE OVERHEAD PANEL TO DETERMINE THE CAUSE OF THE CAUTION LIGHT (FEEL DIFFERENTIAL PRESSURE). AT THIS TIME BOTH THE FO AND I NOTICED THE AIRPLANE DRIFTING, AND I STEPPED ON THE BRAKES AS THE AIRPLANE STRUCK THE TOWBAR. I CONTACTED THE GND CREW AND RETURNED TO THE GATE.
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.