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Two line mechanics report about noticing a company B757-200 captain's #1 (forward) window had shattered in flight due to arcing and delamination. Both mechanics had accomplished an engineering order two months earlier on the aircraft that required checking security of the terminal blocks; wires; o-rings; washers and lockwashers.
| Attributes | |
| ACN | 920522 |
| Time | |
| Date | 201011 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | Cockpit Window |
| Person 1 | |
| Function | Technician |
| Qualification | Maintenance Airframe Maintenance Avionics Maintenance Powerplant |
| Person 2 | |
| Function | Technician |
| Qualification | Maintenance Airframe Maintenance Avionics Maintenance Powerplant |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy Deviation - Procedural Maintenance Inflight Event / Encounter Other / Unknown |
Narrative:
Looking through status of our aircraft; I noticed a B757-200 with a #1 [captain's] window replacement for a shattered window. When the captain noticed arcing and delamination they shut the window heat off.two months earlier I did accomplish an engineering order that checked for delamination; security of wires and terminal lugs attached to the window. I and another avionics mechanic checked all six windows. All [terminal] screws were secured and only noticed that two protective caps on the terminal lugs of the #2 sliding right and left windows were missing. I found two caps in the lead's office and installed them. After looking at the engineering order again; it is possible that the o-rings; washers and lockwashers were overlooked.
Original NASA ASRS Text
Title: Two Line Mechanics report about noticing a company B757-200 Captain's #1 (Forward) window had shattered in flight due to arcing and delamination. Both mechanics had accomplished an Engineering Order two months earlier on the aircraft that required checking security of the terminal blocks; wires; O-rings; washers and lockwashers.
Narrative: Looking through status of our aircraft; I noticed a B757-200 with a #1 [Captain's] window replacement for a shattered window. When the Captain noticed arcing and delamination they shut the window heat off.Two months earlier I did accomplish an Engineering Order that checked for delamination; security of wires and terminal lugs attached to the window. I and another Avionics Mechanic checked all six windows. All [terminal] screws were secured and only noticed that two protective caps on the terminal lugs of the #2 sliding right and left windows were missing. I found two caps in the Lead's office and installed them. After looking at the Engineering Order again; it is possible that the O-Rings; washers and lockwashers were overlooked.
Data retrieved from NASA's ASRS site as of April 2012 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.