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A line mechanic reports removing two lock-out pins from a B757-200 engine reverser isolation valve; instead of one pin. One MEL procedure was not followed due to haste and misinterpretation. Aircraft released even though MEL not fully complied with.
| Attributes | |
| ACN | 866643 |
| Time | |
| Date | 200912 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Dusk |
| Aircraft 1 | |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | Reverser Lockout |
| Person 1 | |
| Function | Technician |
| Qualification | Maintenance Airframe Maintenance Powerplant |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural FAR Deviation - Procedural MEL |
Narrative:
Haste and misinterpretation of lengthy MEL process. Removed both locked-out pins from isolation valve instead of one pin. Not fully complied with MEL; one MEL procedure was not followed. Contacted maintenance control; advised them of what happened to contact line station to install pin.
Original NASA ASRS Text
Title: A Line Mechanic reports removing two Lock-out Pins from a B757-200 engine Reverser Isolation valve; instead of one Pin. One MEL procedure was not followed due to haste and misinterpretation. Aircraft released even though MEL not fully complied with.
Narrative: Haste and misinterpretation of lengthy MEL process. Removed both Locked-out Pins from Isolation valve instead of one pin. Not fully complied with MEL; one MEL procedure was not followed. Contacted Maintenance Control; advised them of what happened to contact Line station to install Pin.
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.