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A B737-700 was released for service with the horizontal stabilizer jackscrew fail safe lug missing the bolts and washers that thread into the lug.
| Attributes | |
| ACN | 718923 |
| Time | |
| Date | 200611 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : inspector |
| ASRS Report | 718923 |
| 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 : published procedure non adherence : far |
| Independent Detector | other other : 2 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : work cards performance deficiency : logbook entry performance deficiency : scheduled maintenance performance deficiency : non compliance with legal requirements performance deficiency : inspection performance deficiency : installation |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Chart Or Publication Aircraft |
| Primary Problem | Maintenance Human Performance |
| Situations | |
| Publication | Job Card |
Narrative:
I was informed that several stabilizer jackscrews that I inspected were possibly missing the bolts and washers that thread into the failsafe lugs on the bottom of the stabilizer jackscrew. I believe one of the contributing factors why I may have missed these bolts not being installed is that we were used to changing B-300 jackscrews and they do not have these bolts or washers and the B-700 jackscrews that were coming in to be changed did not have the bolts installed either. So the fact that they were not there didn't cause any alarm. Also the new jackscrews do not come from the vendor with these bolts installed.
Original NASA ASRS Text
Title: A B737-700 WAS RELEASED FOR SVC WITH THE HORIZ STABILIZER JACKSCREW FAIL SAFE LUG MISSING THE BOLTS AND WASHERS THAT THREAD INTO THE LUG.
Narrative: I WAS INFORMED THAT SEVERAL STABILIZER JACKSCREWS THAT I INSPECTED WERE POSSIBLY MISSING THE BOLTS AND WASHERS THAT THREAD INTO THE FAILSAFE LUGS ON THE BOTTOM OF THE STABILIZER JACKSCREW. I BELIEVE ONE OF THE CONTRIBUTING FACTORS WHY I MAY HAVE MISSED THESE BOLTS NOT BEING INSTALLED IS THAT WE WERE USED TO CHANGING B-300 JACKSCREWS AND THEY DO NOT HAVE THESE BOLTS OR WASHERS AND THE B-700 JACKSCREWS THAT WERE COMING IN TO BE CHANGED DID NOT HAVE THE BOLTS INSTALLED EITHER. SO THE FACT THAT THEY WERE NOT THERE DIDN'T CAUSE ANY ALARM. ALSO THE NEW JACKSCREWS DO NOT COME FROM THE VENDOR WITH THESE BOLTS INSTALLED.
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.