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A B777 technician reports possible error in location of landing light box drain hole. 3 holes drilled correctly but 4TH hole may be in error.
| Attributes | |
| ACN | 610213 |
| Time | |
| Date | 200403 |
| Day | Thu |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B777-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : airframe |
| Experience | maintenance technician : 8 |
| ASRS Report | 610213 |
| 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 : person 1 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other |
| Factors | |
| Maintenance | contributing factor : manuals contributing factor : work cards performance deficiency : scheduled maintenance performance deficiency : repair performance deficiency : installation |
| Supplementary | |
| Problem Areas | Aircraft Chart Or Publication Maintenance Human Performance |
| Primary Problem | Chart Or Publication |
Narrative:
Was assigned to work area and aircraft I normally do not do. While working a write-up for moisture on landing gear lens cover, boeing service bulletin required that 4 drain holes be drilled. 3 were easily located by using provided diagrams, and the provided maintenance manual -- air carrier/B777 maintenance manual S7-41-99, pages 801 to 805. The last hole, diagram 803, was hard to locate. I drilled the 4TH hole, but am not sure if it was properly located. This is not a safety issue, but is of concern as it may have been a maintenance error.
Original NASA ASRS Text
Title: A B777 TECHNICIAN RPTS POSSIBLE ERROR IN LOCATION OF LNDG LIGHT BOX DRAIN HOLE. 3 HOLES DRILLED CORRECTLY BUT 4TH HOLE MAY BE IN ERROR.
Narrative: WAS ASSIGNED TO WORK AREA AND ACFT I NORMALLY DO NOT DO. WHILE WORKING A WRITE-UP FOR MOISTURE ON LNDG GEAR LENS COVER, BOEING SVC BULLETIN REQUIRED THAT 4 DRAIN HOLES BE DRILLED. 3 WERE EASILY LOCATED BY USING PROVIDED DIAGRAMS, AND THE PROVIDED MAINT MANUAL -- ACR/B777 MAINT MANUAL S7-41-99, PAGES 801 TO 805. THE LAST HOLE, DIAGRAM 803, WAS HARD TO LOCATE. I DRILLED THE 4TH HOLE, BUT AM NOT SURE IF IT WAS PROPERLY LOCATED. THIS IS NOT A SAFETY ISSUE, BUT IS OF CONCERN AS IT MAY HAVE BEEN A MAINT ERROR.
Data retrieved from NASA's ASRS site as of July 2007 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.