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A line aircraft maintenance technician noticed during a pre-departure check on a B777-200 aircraft; the captain's seat forward limit switch was broken off. The front rail stops were also not correctly positioned. Unclear procedures and drawings in the aircraft maintenance manual allowed for misinterpretation of installation.
| Attributes | |
| ACN | 1099029 |
| Time | |
| Date | 201307 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B777-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | Pilot Seat |
| Person 1 | |
| Function | Technician |
| Qualification | Maintenance Airframe Maintenance Powerplant |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy |
Narrative:
While working B777-200 today; I noticed the captain's seat front rail stops were not correctly positioned; and when I checked the forward limit switch; it was broken off. After noticing the discrepancy; I placarded on MEL 25-1a; the captain's seat power functions inoperative. As said before; it appears the figures and explanations on seat installation are not clear enough. Evening; ETOPS pre-departure check (pre departure clearance).
Original NASA ASRS Text
Title: A Line Aircraft Maintenance Technician noticed during a Pre-Departure Check on a B777-200 aircraft; the Captain's seat forward limit switch was broken off. The front rail stops were also not correctly positioned. Unclear procedures and drawings in the Aircraft Maintenance Manual allowed for misinterpretation of installation.
Narrative: While working B777-200 today; I noticed the Captain's seat front rail stops were not correctly positioned; and when I checked the forward limit switch; it was broken off. After noticing the discrepancy; I placarded on MEL 25-1a; the Captain's seat power functions inoperative. As said before; it appears the figures and explanations on seat installation are not clear enough. Evening; ETOPS Pre-Departure Check (PDC).
Data retrieved from NASA's ASRS site as of July 2013 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.