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A B737-400 had right wing navigation light inoperative. Technician replaced light. Light access panel had stripped fasteners. Failed to install all fasteners.
| Attributes | |
| ACN | 684532 |
| Time | |
| Date | 200601 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-400 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| ASRS Report | 684532 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : lead technician |
| Events | |
| Anomaly | aircraft equipment problem : less severe maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : far non adherence : published procedure |
| Independent Detector | other other : 1 |
| 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 : non compliance with legal requirements |
| Supplementary | |
| Problem Areas | Aircraft Chart Or Publication Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
Approximately XA00 hours; I was assigned r-hand wing navigation light. My lead told me to stand by; he wanted to check with ZZZ for an MEL. While waiting; I gathered up my tools and bulbs plus a lift truck and proceeded out to the aircraft. Lift truck kept dying while trying to position it. Got into position. Went upstairs and turned off switch and tagged. Went back downstairs and started to change navigation light. Found approximately 6-10 fasteners stripped. Having to use lapping component to remove them; proceeded to change navigation light pre-assembled light assembly. Installed good screws into panel. Before buttoning up panel; I thought I should go and see if it worked. Went upstairs to operations check; went back downstairs to operations check -- operations normal. Went back upstairs to sign off book. Called off aircraft. Came back to office to put tools away; entered log page; and discovered stripped screws I had intended to replace in my pocket! I grabbed a screw gun and a lift truck and went back out. Plane had pushed; so I called coordinator and told him what had happened. Approximately 15-20 min lapsed.
Original NASA ASRS Text
Title: A B737-400 HAD R WING NAV LIGHT INOP. TECHNICIAN REPLACED LIGHT. LIGHT ACCESS PANEL HAD STRIPPED FASTENERS. FAILED TO INSTALL ALL FASTENERS.
Narrative: APPROX XA00 HRS; I WAS ASSIGNED R-HAND WING NAV LIGHT. MY LEAD TOLD ME TO STAND BY; HE WANTED TO CHK WITH ZZZ FOR AN MEL. WHILE WAITING; I GATHERED UP MY TOOLS AND BULBS PLUS A LIFT TRUCK AND PROCEEDED OUT TO THE ACFT. LIFT TRUCK KEPT DYING WHILE TRYING TO POS IT. GOT INTO POS. WENT UPSTAIRS AND TURNED OFF SWITCH AND TAGGED. WENT BACK DOWNSTAIRS AND STARTED TO CHANGE NAV LIGHT. FOUND APPROX 6-10 FASTENERS STRIPPED. HAVING TO USE LAPPING COMPONENT TO REMOVE THEM; PROCEEDED TO CHANGE NAV LIGHT PRE-ASSEMBLED LIGHT ASSEMBLY. INSTALLED GOOD SCREWS INTO PANEL. BEFORE BUTTONING UP PANEL; I THOUGHT I SHOULD GO AND SEE IF IT WORKED. WENT UPSTAIRS TO OPS CHK; WENT BACK DOWNSTAIRS TO OPS CHK -- OPS NORMAL. WENT BACK UPSTAIRS TO SIGN OFF BOOK. CALLED OFF ACFT. CAME BACK TO OFFICE TO PUT TOOLS AWAY; ENTERED LOG PAGE; AND DISCOVERED STRIPPED SCREWS I HAD INTENDED TO REPLACE IN MY POCKET! I GRABBED A SCREW GUN AND A LIFT TRUCK AND WENT BACK OUT. PLANE HAD PUSHED; SO I CALLED COORDINATOR AND TOLD HIM WHAT HAD HAPPENED. APPROX 15-20 MIN LAPSED.
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.