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An airbus 319 parked at gate had #1 engine running to check engine vibration when throttle advanced above idle power, the airplane moved forward striking a jetway.
| Attributes | |
| ACN | 506169 |
| Time | |
| Date | 200103 |
| Day | Sun |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Controlling Facilities | tracon : mht.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | A319 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : airframe technician : powerplant |
| Experience | maintenance technician : 27 |
| ASRS Report | 506169 |
| Events | |
| Anomaly | aircraft equipment problem : critical ground encounters other maintenance problem : improper maintenance non adherence : company policies non adherence : far non adherence : published procedure |
| Independent Detector | other other : person 1 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other other |
| Factors | |
| Maintenance | performance deficiency : testing performance deficiency : non compliance with legal requirements performance deficiency : unqualified personnel |
| Supplementary | |
| Problem Areas | Aircraft Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
I was running the aircraft to check if a #1 engine vibration problem had been fixed after performing maintenance task described in maintenance manual. With engine #1 at idle, no vibration was noted. I bumped the throttle up a little above idle to see if vibration would occur a little higher RPM. As soon as I noted RPM increase, I pulled throttle back to idle. However, the RPM had increased enough to move the aircraft forward moving chocks and contacting the jetway causing damage to inboard leading edge slat and engine pylon structure. Even though the parking brake was set, the aft did move forward. Instinctively I stepped on the brake pedals which had no effect because on the airbus normal brakes are inhibited with parking brake engaged.
Original NASA ASRS Text
Title: AN AIRBUS 319 PARKED AT GATE HAD #1 ENG RUNNING TO CHK ENG VIBRATION WHEN THROTTLE ADVANCED ABOVE IDLE PWR, THE AIRPLANE MOVED FORWARD STRIKING A JETWAY.
Narrative: I WAS RUNNING THE ACFT TO CHK IF A #1 ENG VIBRATION PROB HAD BEEN FIXED AFTER PERFORMING MAINT TASK DESCRIBED IN MAINT MANUAL. WITH ENG #1 AT IDLE, NO VIBRATION WAS NOTED. I BUMPED THE THROTTLE UP A LITTLE ABOVE IDLE TO SEE IF VIBRATION WOULD OCCUR A LITTLE HIGHER RPM. AS SOON AS I NOTED RPM INCREASE, I PULLED THROTTLE BACK TO IDLE. HOWEVER, THE RPM HAD INCREASED ENOUGH TO MOVE THE ACFT FORWARD MOVING CHOCKS AND CONTACTING THE JETWAY CAUSING DAMAGE TO INBOARD LEADING EDGE SLAT AND ENG PYLON STRUCTURE. EVEN THOUGH THE PARKING BRAKE WAS SET, THE AFT DID MOVE FORWARD. INSTINCTIVELY I STEPPED ON THE BRAKE PEDALS WHICH HAD NO EFFECT BECAUSE ON THE AIRBUS NORMAL BRAKES ARE INHIBITED WITH PARKING BRAKE ENGAGED.
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.