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A B737-700 had #3 brake replaced prior to departure. At departure at next station; aircraft returned to field due #3 brake line detached.
| Attributes | |
| ACN | 667995 |
| Time | |
| Date | 200508 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| ASRS Report | 667995 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : far non adherence : published procedure |
| Independent Detector | other other : 3 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : inspection performance deficiency : installation performance deficiency : logbook entry performance deficiency : testing performance deficiency : non compliance with legal requirements |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Aircraft |
| Primary Problem | Maintenance Human Performance |
Narrative:
On aug/thu/05; aircraft X reported an air turnback to ZZZ1 and found #3 brake line detached. I am entering a statement on aircraft X #3 brake that was changed on aug/wed/05. The brake line in question was installed and leak checked at 3000 psi hydraulic pressure per maintenance manuals. Myself and a fellow mechanic worked on this brake. He installed the line then proceeded to cockpit to apply pressure for leak check. I observed no leaks. I also saw and heard the brake engage. I don't know what happened with this reported event; but feel that we followed instructions to the letters.
Original NASA ASRS Text
Title: A B737-700 HAD #3 BRAKE REPLACED PRIOR TO DEP. AT DEP AT NEXT STATION; ACFT RETURNED TO FIELD DUE #3 BRAKE LINE DETACHED.
Narrative: ON AUG/THU/05; ACFT X RPTED AN AIR TURNBACK TO ZZZ1 AND FOUND #3 BRAKE LINE DETACHED. I AM ENTERING A STATEMENT ON ACFT X #3 BRAKE THAT WAS CHANGED ON AUG/WED/05. THE BRAKE LINE IN QUESTION WAS INSTALLED AND LEAK CHKED AT 3000 PSI HYD PRESSURE PER MAINT MANUALS. MYSELF AND A FELLOW MECH WORKED ON THIS BRAKE. HE INSTALLED THE LINE THEN PROCEEDED TO COCKPIT TO APPLY PRESSURE FOR LEAK CHK. I OBSERVED NO LEAKS. I ALSO SAW AND HEARD THE BRAKE ENGAGE. I DON'T KNOW WHAT HAPPENED WITH THIS RPTED EVENT; BUT FEEL THAT WE FOLLOWED INSTRUCTIONS TO THE LETTERS.
Data retrieved from NASA's ASRS site as of January 2009 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.