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An engine repair station inspector reports about the unapproved use of a visible; adjustable setting; micrometer 'click' type torque wrench during the overhaul and build-up of rolls royce rb-211 and trent-900 engines.
| Attributes | |
| ACN | 939625 |
| Time | |
| Date | 201103 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | No Aircraft |
| Component | |
| Aircraft Component | Fan Disc |
| Person 1 | |
| Function | Inspector |
| Qualification | Maintenance Airframe Maintenance Powerplant |
| Experience | Maintenance Inspector 16 Maintenance Lead Technician 0 Maintenance Technician 15 |
| Events | |
| Anomaly | Deviation - Procedural Published Material / Policy Deviation - Procedural Maintenance |
Narrative:
Visible micrometer adjustable setting [click] type torque wrenches have been used contrary to the original equipment manufacturer (oem) standard practices manual (spm) 70-51-00; paragraph 'east'; for visible micrometer adjustable setting type torque wrench: (1) visible micrometer adjustable setting [click] type torque wrenches must not be used on high integrity and main rotor components; that is; disk to shaft joints [engine build-ups]. They may be used on other areas only if checked by the user at the required torque setting on a 'torquemaster' style [torque] gauge before being used; (at least once a day) and if they have an accuracy within +/- 5%. This was not followed. The above described micrometer adjustable [click type] torque wrenches have been used in all applications and have not been checked 'at least once a day' by the operator. Our carrier repair station engineering order (east/O) does not give the relief to continue using the micrometer adjustable type torque wrenches.
Original NASA ASRS Text
Title: An engine repair station Inspector reports about the unapproved use of a visible; adjustable setting; Micrometer 'Click' type torque wrench during the overhaul and build-up of Rolls Royce RB-211 and Trent-900 engines.
Narrative: Visible micrometer adjustable setting [click] type torque wrenches have been used contrary to the Original Equipment Manufacturer (OEM) Standard Practices Manual (SPM) 70-51-00; paragraph 'E'; for visible micrometer adjustable setting type torque wrench: (1) Visible micrometer adjustable setting [click] type torque wrenches must not be used on high integrity and main rotor components; that is; disk to shaft joints [engine build-ups]. They may be used on other areas only if checked by the user at the required torque setting on a 'Torquemaster' style [torque] gauge before being used; (at least once a day) and if they have an accuracy within +/- 5%. This was not followed. The above described micrometer adjustable [click type] torque wrenches have been used in all applications and have not been checked 'at least once a day' by the operator. Our carrier repair station Engineering Order (E/O) does not give the relief to continue using the micrometer adjustable type torque wrenches.
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.