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An engine shop inspector reports a company engineer has ignored inspection procedures and results of inspection measurements indicating a pw-2000 engine high pressure turbine module had exceeded the maximum allowable clearances between the high pressure turbine's outer shroud inner duct segments and the high pressure turbine T-1 and T-2 (1st and 2nd stage) blade tips.
| Attributes | |
| ACN | 938961 |
| Time | |
| Date | 201103 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | No Aircraft |
| Component | |
| Aircraft Component | Turbine Assembly |
| Person 1 | |
| Function | Inspector |
| Qualification | Maintenance Airframe Maintenance Powerplant |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural FAR Deviation - Procedural Published Material / Policy |
Narrative:
Inspection measured a high pressure turbine module per pw engine manual 72-52-00-00; page 14 in the running position; as specified in engine manual. Module failed 2(a); (B); [and] (C) measurements. Measurement was 0.109; maximum limit is 0.102. Inspection then did measurement of all 40 [duct] segments; to verify that it failed; noted on inspection's non-routine discrepancies. Module failed those measurements too. Inspection wrote it up. Engineer X had it measured again; but in a maintenance stand; measurement recorded was 0.084 and said it passed. Per engine manual; module is only to be measured in running position.
Original NASA ASRS Text
Title: An Engine Shop Inspector reports a company Engineer has ignored Inspection procedures and results of Inspection measurements indicating a PW-2000 engine high pressure turbine module had exceeded the maximum allowable clearances between the high pressure turbine's outer shroud inner duct segments and the high pressure turbine T-1 and T-2 (1st and 2nd stage) blade tips.
Narrative: Inspection measured a high pressure turbine module per PW Engine Manual 72-52-00-00; page 14 in the running position; as specified in Engine Manual. Module failed 2(A); (B); [and] (C) measurements. Measurement was 0.109; maximum limit is 0.102. Inspection then did measurement of all 40 [duct] segments; to verify that it failed; noted on Inspection's non-routine discrepancies. Module failed those measurements too. Inspection wrote it up. Engineer X had it measured again; but in a maintenance stand; measurement recorded was 0.084 and said it passed. Per Engine Manual; module is only to be measured in running position.
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.