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A line mechanic reports he heard sounds of a pneumatic leak at the right wing leading edge at wing stations 248 and 268 on a B757-200 prior to departure. He found two clamps loose that required six more turns on the locking nut to get the correct torque to stop the pneumatic duct leaks. Aircraft was previously repaired at a contract maintenance station.
| Attributes | |
| ACN | 930699 |
| Time | |
| Date | 201102 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | Pneumatic Ducting |
| Person 1 | |
| Function | Inspector Technician |
| Qualification | Maintenance Powerplant Maintenance Airframe |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy Deviation - Procedural Maintenance |
Narrative:
Right-hand wing leading edge; at approximate wing station 248; had sounds of pneumatic leak. Found two each [duct] clamps loose at wing station 248 and 268; see illustrated parts catalog (ipc) 36-11-01-003; item 10. Clamps were not tight and turned nuts down another six turns for correct torque. Accomplished [pneumatic] leak check after securing ducts; no leaks found. Vendor repaired aircraft.
Original NASA ASRS Text
Title: A Line Mechanic reports he heard sounds of a pneumatic leak at the right wing leading edge at wing stations 248 and 268 on a B757-200 prior to departure. He found two clamps loose that required six more turns on the locking nut to get the correct torque to stop the pneumatic duct leaks. Aircraft was previously repaired at a Contract Maintenance station.
Narrative: Right-hand wing leading edge; at approximate wing station 248; had sounds of pneumatic leak. Found two each [duct] clamps loose at wing station 248 and 268; see Illustrated Parts Catalog (IPC) 36-11-01-003; item 10. Clamps were not tight and turned nuts down another six turns for correct torque. Accomplished [pneumatic] leak check after securing ducts; no leaks found. Vendor repaired aircraft.
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.