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An airbus 320 was dispatched and returned to the gate on taxi out due to brake malfunction caused by incomplete brake bleeding procedures.
| Attributes | |
| ACN | 446077 |
| Time | |
| Date | 199908 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | A320 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance ground : parked |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : airframe technician : powerplant |
| ASRS Report | 446077 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : published procedure non adherence : company policies |
| Independent Detector | other other : 969 |
| Consequence | other |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : fault isolation performance deficiency : non compliance with legal requirements performance deficiency : testing |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Aircraft |
| Primary Problem | Maintenance Human Performance |
Narrative:
On aug/xa/99, I worked on aircraft xyz with a brake problem. I replaced the safety valve and bleed all the air out. (I didn't bleed the secondary system.) the plane left the gate, taxied out, then returned with the same problem. Plane went to the hangar and they bled the system again. At the time I was working 2 planes when I was bleeding the brakes. I was in a rush to get the aircraft ready for the next trip and didn't read all the maintenance manual.
Original NASA ASRS Text
Title: AN AIRBUS 320 WAS DISPATCHED AND RETURNED TO THE GATE ON TAXI OUT DUE TO BRAKE MALFUNCTION CAUSED BY INCOMPLETE BRAKE BLEEDING PROCS.
Narrative: ON AUG/XA/99, I WORKED ON ACFT XYZ WITH A BRAKE PROB. I REPLACED THE SAFETY VALVE AND BLEED ALL THE AIR OUT. (I DIDN'T BLEED THE SECONDARY SYS.) THE PLANE LEFT THE GATE, TAXIED OUT, THEN RETURNED WITH THE SAME PROB. PLANE WENT TO THE HANGAR AND THEY BLED THE SYS AGAIN. AT THE TIME I WAS WORKING 2 PLANES WHEN I WAS BLEEDING THE BRAKES. I WAS IN A RUSH TO GET THE ACFT READY FOR THE NEXT TRIP AND DIDN'T READ ALL THE MAINT MANUAL.
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.