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A line mechanic reports a B777-200 illustrated parts catalog (ipc) picture reference of #4 and #11 spoiler return and pressure lines at the power control unit (PCU) actuator swivel block were reversed. Also; no authorization exists to use superseded part numbers not found in their ipc list as replacement for ipc part numbers.
| Attributes | |
| ACN | 952525 |
| Time | |
| Date | 201106 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | B777-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | Speedbrake/Spoiler |
| Person 1 | |
| Function | Technician |
| Qualification | Maintenance Airframe Maintenance Powerplant |
| Experience | Maintenance Lead Technician 0 Maintenance Technician 24 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Other / Unknown |
Narrative:
A B777-200 aircraft had a hydraulic leak dripping from the #11 spoiler. The leak originated at the return line union on the power control unit's (PCU) [actuator] swivel block. Illustrated parts catalog (ipc) chapter 27-61-09-11 shows the breakdown of the #4 and #11 PCU. The return and pressure line are both attached to the swivel block with the return line (the larger of the two) on the flap-side while the pressure line is on the spar-side. The ipc; though; shows the return and pressure lines in the reversed positions.furthermore; the packing [O-ring] required to repair the return line union leak was item #350 in the ipc. Its manufacture part number is NAS1612-8 (national aerospace standards) and company part number is XXXX. These numbers are superseded in the [maintenance computer system]; but not in the ipc. The packing for the pressure union is also superseded in [the computer system]; but not the ipc.
Original NASA ASRS Text
Title: A Line Mechanic reports a B777-200 Illustrated Parts Catalog (IPC) picture reference of #4 and #11 spoiler return and pressure lines at the Power Control Unit (PCU) actuator swivel block were reversed. Also; no authorization exists to use superseded part numbers not found in their IPC list as replacement for IPC part numbers.
Narrative: A B777-200 aircraft had a hydraulic leak dripping from the #11 spoiler. The leak originated at the return line union on the Power Control Unit's (PCU) [actuator] swivel block. Illustrated Parts Catalog (IPC) chapter 27-61-09-11 shows the breakdown of the #4 and #11 PCU. The return and pressure line are both attached to the swivel block with the return line (the larger of the two) on the flap-side while the pressure line is on the spar-side. The IPC; though; shows the return and pressure lines in the reversed positions.Furthermore; the packing [O-ring] required to repair the return line union leak was item #350 in the IPC. Its manufacture part number is NAS1612-8 (National Aerospace Standards) and company part number is XXXX. These numbers are superseded in the [Maintenance computer system]; but not in the IPC. The packing for the pressure union is also superseded in [the computer system]; but not the IPC.
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.