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A B767-300 was dispatched in non compliance with a leased #2 engine installed with the incorrect aft mount bolts installed.
| Attributes | |
| ACN | 460049 |
| Time | |
| Date | 200001 |
| Day | Thu |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B767-300 and 300 ER |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance ground : parked |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : airframe |
| Experience | maintenance technician : 1 |
| ASRS Report | 460049 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : airframe technician : powerplant |
| Experience | maintenance technician : 15 |
| ASRS Report | 460039 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : far non adherence : published procedure |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : work cards performance deficiency : repair performance deficiency : installation performance deficiency : inspection |
| Supplementary | |
| Problem Areas | Aircraft Maintenance Human Performance Chart Or Publication |
| Primary Problem | Maintenance Human Performance |
| Situations | |
| Publication | Maint Manual Engine Change |
Narrative:
During routine inspection, it was found that the #2 engine aft mount bolts were of incorrect length. The bolts had been previously installed at the last engine change. At this time the new bolts were verified to be of the same type and length as the ones that were replaced. At the time of the engine change, 2 prebuilt mount bolt kits were effective for the aircraft type. One kit was for a hard-mount engine, the other for a soft-mount type. The kits are almost identical except for bolt grip length of aft bolts only. Also, at this engine change the new engine was leased from pratt and whitney and was of a different confign. Several conversions had to be made to the new engine and aircraft. These conversions may have led to confusion.
Original NASA ASRS Text
Title: A B767-300 WAS DISPATCHED IN NON COMPLIANCE WITH A LEASED #2 ENG INSTALLED WITH THE INCORRECT AFT MOUNT BOLTS INSTALLED.
Narrative: DURING ROUTINE INSPECTION, IT WAS FOUND THAT THE #2 ENG AFT MOUNT BOLTS WERE OF INCORRECT LENGTH. THE BOLTS HAD BEEN PREVIOUSLY INSTALLED AT THE LAST ENG CHANGE. AT THIS TIME THE NEW BOLTS WERE VERIFIED TO BE OF THE SAME TYPE AND LENGTH AS THE ONES THAT WERE REPLACED. AT THE TIME OF THE ENG CHANGE, 2 PREBUILT MOUNT BOLT KITS WERE EFFECTIVE FOR THE ACFT TYPE. ONE KIT WAS FOR A HARD-MOUNT ENG, THE OTHER FOR A SOFT-MOUNT TYPE. THE KITS ARE ALMOST IDENTICAL EXCEPT FOR BOLT GRIP LENGTH OF AFT BOLTS ONLY. ALSO, AT THIS ENG CHANGE THE NEW ENG WAS LEASED FROM PRATT AND WHITNEY AND WAS OF A DIFFERENT CONFIGN. SEVERAL CONVERSIONS HAD TO BE MADE TO THE NEW ENG AND ACFT. THESE CONVERSIONS MAY HAVE LED TO CONFUSION.
Data retrieved from NASA's ASRS site as of July 2007 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.