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PIC of a just parked B727 releases the parking brake with #1 engine still running. The aircraft had been chocked but the ramp slope and the idle thrust allowed the aircraft to jump the chocks.
| Attributes | |
| ACN | 395875 |
| Time | |
| Date | 199803 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : slc |
| State Reference | UT |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B727 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : parked |
| Flight Plan | None |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 200 flight time total : 4000 flight time type : 1500 |
| ASRS Report | 395875 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : ground critical non adherence other other anomaly other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : regained aircraft control other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Taxi into gate was normal. Captain set the parking brake and was given the 'chocks-in' signal by our ground crew. The #1 engine was still running while the captain released the brakes. Almost immediately, the aircraft's thrust and slight incline of ramp caused the plane to roll forward and 'jump' the chocks. We caught the aircraft movement after about 10 ft of forward roll. No aircraft or equipment damage occurred. Fortunately, our ground personnel were also clear of the rolling aircraft. The potential for serious harm was great. Our operating procedures allow for releasing the parking brakes only after the engines are shut down.
Original NASA ASRS Text
Title: PIC OF A JUST PARKED B727 RELEASES THE PARKING BRAKE WITH #1 ENG STILL RUNNING. THE ACFT HAD BEEN CHOCKED BUT THE RAMP SLOPE AND THE IDLE THRUST ALLOWED THE ACFT TO JUMP THE CHOCKS.
Narrative: TAXI INTO GATE WAS NORMAL. CAPT SET THE PARKING BRAKE AND WAS GIVEN THE 'CHOCKS-IN' SIGNAL BY OUR GND CREW. THE #1 ENG WAS STILL RUNNING WHILE THE CAPT RELEASED THE BRAKES. ALMOST IMMEDIATELY, THE ACFT'S THRUST AND SLIGHT INCLINE OF RAMP CAUSED THE PLANE TO ROLL FORWARD AND 'JUMP' THE CHOCKS. WE CAUGHT THE ACFT MOVEMENT AFTER ABOUT 10 FT OF FORWARD ROLL. NO ACFT OR EQUIP DAMAGE OCCURRED. FORTUNATELY, OUR GND PERSONNEL WERE ALSO CLR OF THE ROLLING ACFT. THE POTENTIAL FOR SERIOUS HARM WAS GREAT. OUR OPERATING PROCS ALLOW FOR RELEASING THE PARKING BRAKES ONLY AFTER THE ENGS ARE SHUT DOWN.
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.