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Uncertain verbal commands are received on interphone at a foreign location to stop a pushback when the towbar becomes disconnected. Previous commands were visual signals.
| Attributes | |
| ACN | 569295 |
| Time | |
| Date | 200212 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : mroc.airport |
| State Reference | FO |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : bwi.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | A300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : taxi |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 569295 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | non adherence : published procedure other anomaly other |
| Independent Detector | other other : 3 & 4 |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | other |
| Supplementary | |
| Problem Areas | Company Flight Crew Human Performance |
| Primary Problem | Company |
Narrative:
Guideman gave signal to stop aircraft a little late resulting in aircraft being stopped a couple of ft too far forward. Parking brakes were set and engines were shut down. Signal from guideman indicated that we needed to be pushed back some. Shortly after observing the release brake signal, the aircraft began rolling backward and immediately a man on a headset said 'sir, sir, sir' several times. Seeing a hand signal to stop, I applied the toe brakes with no effect. The parking brake was immediately reset with a minor jolt. No cabin or ground personnel injuries observed or reported. By all indications, the tow bar was apparently not secure in place before the release brake signal was given. In the future, I will wait for headset communication to avoid any confusion -- especially in a foreign country.
Original NASA ASRS Text
Title: UNCERTAIN VERBAL COMMANDS ARE RECEIVED ON INTERPHONE AT A FOREIGN LOCATION TO STOP A PUSHBACK WHEN THE TOWBAR BECOMES DISCONNECTED. PREVIOUS COMMANDS WERE VISUAL SIGNALS.
Narrative: GUIDEMAN GAVE SIGNAL TO STOP ACFT A LITTLE LATE RESULTING IN ACFT BEING STOPPED A COUPLE OF FT TOO FAR FORWARD. PARKING BRAKES WERE SET AND ENGS WERE SHUT DOWN. SIGNAL FROM GUIDEMAN INDICATED THAT WE NEEDED TO BE PUSHED BACK SOME. SHORTLY AFTER OBSERVING THE RELEASE BRAKE SIGNAL, THE ACFT BEGAN ROLLING BACKWARD AND IMMEDIATELY A MAN ON A HEADSET SAID 'SIR, SIR, SIR' SEVERAL TIMES. SEEING A HAND SIGNAL TO STOP, I APPLIED THE TOE BRAKES WITH NO EFFECT. THE PARKING BRAKE WAS IMMEDIATELY RESET WITH A MINOR JOLT. NO CABIN OR GND PERSONNEL INJURIES OBSERVED OR RPTED. BY ALL INDICATIONS, THE TOW BAR WAS APPARENTLY NOT SECURE IN PLACE BEFORE THE RELEASE BRAKE SIGNAL WAS GIVEN. IN THE FUTURE, I WILL WAIT FOR HEADSET COM TO AVOID ANY CONFUSION -- ESPECIALLY IN A FOREIGN COUNTRY.
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.