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A B737-700 approved change order to replace eyebrow windows with plugs was accomplished in accordance with FAA form 337. Technician failed to sign airworthiness release on completion of work.
| Attributes | |
| ACN | 717836 |
| Time | |
| Date | 200608 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : airframe |
| ASRS Report | 717836 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : airframe |
| ASRS Report | 717831 |
| Events | |
| Anomaly | maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : far non adherence : published procedure |
| Independent Detector | other other : 31 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | performance deficiency : non compliance with legal requirements performance deficiency : logbook entry |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Aircraft Chart Or Publication |
| Primary Problem | Maintenance Human Performance |
Narrative:
An airworthiness release was not issued upon the completion of aco (approved change order) eyebrow window deletion -- left side. This aco was considered to be a major alteration. Supplemental information from acn 717851: I received a letter from quality control informing me that I performed an eyebrow window deletion modification but did not give the aircraft an airworthiness release. The aircraft was assigned a maintenance visit; which does not require an airworthiness release; but the modification was considered a major alteration; which does require an airworthiness release. It's not that I forgot; I followed the paperwork steps but they did not include a signoff to perform an airworthiness release. In my memory this is the first modification in a line overnight situation that was a major alteration. We were doing several a night so I guess no mechanic or quality control caught on until the B-700 fleet was done or close to it.
Original NASA ASRS Text
Title: A B737-700 APPROVED CHANGE ORDER TO REPLACE EYEBROW WINDOWS WITH PLUGS WAS ACCOMPLISHED IN ACCORDANCE WITH FAA FORM 337. TECHNICIAN FAILED TO SIGN AIRWORTHINESS RELEASE ON COMPLETION OF WORK.
Narrative: AN AIRWORTHINESS RELEASE WAS NOT ISSUED UPON THE COMPLETION OF ACO (APPROVED CHANGE ORDER) EYEBROW WINDOW DELETION -- L SIDE. THIS ACO WAS CONSIDERED TO BE A MAJOR ALTERATION. SUPPLEMENTAL INFO FROM ACN 717851: I RECEIVED A LETTER FROM QUALITY CTL INFORMING ME THAT I PERFORMED AN EYEBROW WINDOW DELETION MODIFICATION BUT DID NOT GIVE THE ACFT AN AIRWORTHINESS RELEASE. THE ACFT WAS ASSIGNED A MAINT VISIT; WHICH DOES NOT REQUIRE AN AIRWORTHINESS RELEASE; BUT THE MODIFICATION WAS CONSIDERED A MAJOR ALTERATION; WHICH DOES REQUIRE AN AIRWORTHINESS RELEASE. IT'S NOT THAT I FORGOT; I FOLLOWED THE PAPERWORK STEPS BUT THEY DID NOT INCLUDE A SIGNOFF TO PERFORM AN AIRWORTHINESS RELEASE. IN MY MEMORY THIS IS THE FIRST MODIFICATION IN A LINE OVERNIGHT SITUATION THAT WAS A MAJOR ALTERATION. WE WERE DOING SEVERAL A NIGHT SO I GUESS NO MECH OR QUALITY CTL CAUGHT ON UNTIL THE B-700 FLEET WAS DONE OR CLOSE TO IT.
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.