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Mechanic working on a B737-500 installed the blocker door drag link to the blocker door with the bolt head in the up position. This was incorrect and damaged the blocker door.
| Attributes | |
| ACN | 779726 |
| Time | |
| Date | 200803 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-500 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : airframe technician : powerplant |
| ASRS Report | 779726 |
| Events | |
| Anomaly | maintenance problem : improper maintenance non adherence : published procedure |
| Independent Detector | other other : 1 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : scheduled maintenance performance deficiency : inspection performance deficiency : installation performance deficiency : non compliance with legal requirements performance deficiency : repair |
| Supplementary | |
| Problem Areas | Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
I installed the blocker door drag link to the blocker door with the bolt head in the up position; in case if the nut were to fall off; the bolt would not fall out. In doing so; the head of the bolt damaged the blocker door.
Original NASA ASRS Text
Title: MECHANIC WORKING ON A B737-500 INSTALLED THE BLOCKER DOOR DRAG LINK TO THE BLOCKER DOOR WITH THE BOLT HEAD IN THE UP POSITION. THIS WAS INCORRECT AND DAMAGED THE BLOCKER DOOR.
Narrative: I INSTALLED THE BLOCKER DOOR DRAG LINK TO THE BLOCKER DOOR WITH THE BOLT HEAD IN THE UP POS; IN CASE IF THE NUT WERE TO FALL OFF; THE BOLT WOULD NOT FALL OUT. IN DOING SO; THE HEAD OF THE BOLT DAMAGED THE BLOCKER DOOR.
Data retrieved from NASA's ASRS site as of May 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.