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An air carrier line aircraft maintenance technician (amt) contracted to perform maintenance on another air carrier's B757-200 aircraft; describes his efforts to install lock-out pins on a rolls royce # 2 engine reverser assembly. The aircraft had lost hydraulic fluid on landing when hydraulic seals had failed in the reverser sync-lok module.
| Attributes | |
| ACN | 1142522 |
| Time | |
| Date | 201401 |
| Local Time Of Day | 1201-1800 |
| 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 | Landing |
| Component | |
| Aircraft Component | Fan Reverser |
| Person 1 | |
| Function | Technician |
| Qualification | Maintenance Powerplant Maintenance Airframe |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy |
Narrative:
During maintenance procedure to lock out #2 engine thrust reversers (T/right) because [of an] active hydraulic leak; could not install mechanical deactivation pin into outboard (O/B) reverser translating sleeve as per MEL 78-31-01 maintenance (M) procedure. Was able to install deactive pin into inboard (I/B) side correctly. Contacted air carrier Y for further instructions. Was instructed to keep the inboard (I/B) pin installed and hydraulically cycle #2 engine reverser to 'open' and 'stow' for possible pin alignment; as this has been a problem in the past. Was also informed that only the outboard T/right would move and not the inboard because of it being mechanically deactivated [by lock-out pin]. Both inboard and outboard T/right deployed; causing damage to the inboard T/right internally at [lock-out] pin location. Contacted air carrier Y to inform [them] of damage and air carrier Y's maintenance was flown to ZZZ to access and repair. Aircraft out of service: maintenance.
Original NASA ASRS Text
Title: An air carrier Line Aircraft Maintenance Technician (AMT) contracted to perform maintenance on another air carrier's B757-200 aircraft; describes his efforts to install Lock-out pins on a Rolls Royce # 2 Engine Reverser assembly. The aircraft had lost hydraulic fluid on landing when hydraulic seals had failed in the reverser sync-lok module.
Narrative: During maintenance procedure to lock out #2 Engine Thrust Reversers (T/R) because [of an] active hydraulic leak; could not install mechanical Deactivation Pin into Outboard (O/B) reverser translating sleeve as per MEL 78-31-01 Maintenance (M) procedure. Was able to install deactive pin into Inboard (I/B) side correctly. Contacted Air Carrier Y for further instructions. Was instructed to keep the Inboard (I/B) pin installed and hydraulically cycle #2 Engine Reverser to 'Open' and 'Stow' for possible pin alignment; as this has been a problem in the past. Was also informed that only the Outboard T/R would move and not the Inboard because of it being mechanically deactivated [by Lock-Out pin]. Both Inboard and Outboard T/R deployed; causing damage to the Inboard T/R internally at [Lock-Out] pin location. Contacted Air Carrier Y to inform [them] of damage and Air Carrier Y's Maintenance was flown to ZZZ to access and repair. Aircraft Out of Service: Maintenance.
Data retrieved from NASA's ASRS site 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.