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A B777, prior to departure, was taken OTS due to lightning strike discovered in the lower forward left fuselage area.
| Attributes | |
| ACN | 628943 |
| Time | |
| Date | 200408 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Aircraft 1 | |
| Controlling Facilities | tower : mso.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B767-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : parked ground : maintenance |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : airframe |
| Experience | maintenance technician : 20 |
| ASRS Report | 628943 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : airframe |
| ASRS Report | 628632 |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | other other : 3 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other other |
| Factors | |
| Maintenance | performance deficiency : inspection |
| Supplementary | |
| Problem Areas | Aircraft Maintenance Human Performance Chart Or Publication |
| Primary Problem | Maintenance Human Performance |
Narrative:
Aircraft X (B777) lightning strike detected by FAA personnel while at gate. Damage located at forward lower left hand side of fuselage. Approximately 31 strikes were later inspected and idented by company mechanics. Subsequent repairs involved simple blending of damage and repaint. One each rivet had to be replaced due to excessive damage beyond limits (reference structural repair manual 53-00-01). After several days of revenue flight, questions arose regarding those repairs and that at least one strike was within the rvsm (revised structural repair manual) critical area (a blend and paint not the rivet replacement) and that this repair was not inspected for contour smoothness (any repair done in the rvsm area requires an inspection to be performed as per the rii guidelines). Hindsight dictates more diligence is required in future aircraft repairs to have rvsm areas inspected for contour smoothness.
Original NASA ASRS Text
Title: A B777, PRIOR TO DEP, WAS TAKEN OTS DUE TO LIGHTNING STRIKE DISCOVERED IN THE LOWER FORWARD L FUSELAGE AREA.
Narrative: ACFT X (B777) LIGHTNING STRIKE DETECTED BY FAA PERSONNEL WHILE AT GATE. DAMAGE LOCATED AT FORWARD LOWER L HAND SIDE OF FUSELAGE. APPROX 31 STRIKES WERE LATER INSPECTED AND IDENTED BY COMPANY MECHS. SUBSEQUENT REPAIRS INVOLVED SIMPLE BLENDING OF DAMAGE AND REPAINT. ONE EACH RIVET HAD TO BE REPLACED DUE TO EXCESSIVE DAMAGE BEYOND LIMITS (REF STRUCTURAL REPAIR MANUAL 53-00-01). AFTER SEVERAL DAYS OF REVENUE FLT, QUESTIONS AROSE REGARDING THOSE REPAIRS AND THAT AT LEAST ONE STRIKE WAS WITHIN THE RVSM (REVISED STRUCTURAL REPAIR MANUAL) CRITICAL AREA (A BLEND AND PAINT NOT THE RIVET REPLACEMENT) AND THAT THIS REPAIR WAS NOT INSPECTED FOR CONTOUR SMOOTHNESS (ANY REPAIR DONE IN THE RVSM AREA REQUIRES AN INSPECTION TO BE PERFORMED AS PER THE RII GUIDELINES). HINDSIGHT DICTATES MORE DILIGENCE IS REQUIRED IN FUTURE ACFT REPAIRS TO HAVE RVSM AREAS INSPECTED FOR CONTOUR SMOOTHNESS.
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.