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Two line mechanics report not locking out (deactivating) the # 3 engine thrust reversers and not downgrading the md-11 aircraft's category (cat) status. Supervisor pressure to depart aircraft and a lack of clarity in the cdl procedure were cited as reasons the MEL maintenance procedures were not accomplished.
| Attributes | |
| ACN | 864335 |
| Time | |
| Date | 200911 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | MD-11 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | Fan Reverser |
| Person 1 | |
| Qualification | Maintenance Powerplant Maintenance Airframe |
| Experience | Maintenance Technician 15 |
| Person 2 | |
| Function | Technician |
| Qualification | Maintenance Avionics Maintenance Airframe Maintenance Powerplant |
| Experience | Maintenance Avionics 36 Maintenance Inspector 5 Maintenance Repairman 7 Maintenance Technician 16 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural MEL Deviation - Procedural Published Material / Policy |
Narrative:
Aircraft was assigned to me and my partner (mechanic 'X'); along with two other aircraft for that night. When we received the md-11 aircraft; I found the #3 engine thrust reverser (TR) blocker door damaged. After walk-around and doing an inspection; I called maintenance control and asked for a deferral on the #3 engine blocker door. Maintenance control said 'yes'; you can defer it; per cdl. The other aircraft that we were assigned; were due out at the same time as I was working on the blocker door. I dispatched the other aircraft leaving md-11 on a late departure. While I was finishing up removing blocker door; mr. 'X' called maintenance control upstairs on the aircraft for a deferral on the #3 engine blocker door. When he came down from the aircraft after he deferred it; we dispatched the aircraft. We did not downgrade and lock out the TR for the #3 engine. We feel because the cdl was unclear; we did not lock out reverser and downgrade the aircraft. It will not happen again; we know where we went wrong.
Original NASA ASRS Text
Title: Two Line Mechanics report not locking out (deactivating) the # 3 engine thrust reversers and not downgrading the MD-11 aircraft's Category (Cat) Status. Supervisor pressure to depart aircraft and a lack of clarity in the CDL procedure were cited as reasons the MEL Maintenance procedures were not accomplished.
Narrative: Aircraft was assigned to me and my partner (Mechanic 'X'); along with two other aircraft for that night. When we received the MD-11 aircraft; I found the #3 engine thrust reverser (TR) blocker door damaged. After Walk-around and doing an Inspection; I called Maintenance Control and asked for a deferral on the #3 engine blocker door. Maintenance Control said 'yes'; you can defer it; per CDL. The other aircraft that we were assigned; were due out at the same time as I was working on the blocker door. I dispatched the other aircraft leaving MD-11 on a late departure. While I was finishing up removing blocker door; Mr. 'X' called Maintenance Control upstairs on the aircraft for a deferral on the #3 engine blocker door. When he came down from the aircraft after he deferred it; we dispatched the aircraft. We did not downgrade and lock out the TR for the #3 engine. We feel because the CDL was unclear; we did not lock out reverser and downgrade the aircraft. It will not happen again; we know where we went wrong.
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.