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A B737-300 engine was changed and the installed engine was mounted in an unfamiliar and non standard cradle. Preload was not exceeded.
| Attributes | |
| ACN | 664860 |
| Time | |
| Date | 200507 |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : airframe |
| ASRS Report | 664860 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : published procedure non adherence : far |
| Independent Detector | other other : 1 |
| Resolutory Action | none taken : detected after the fact |
| Factors | |
| Maintenance | contributing factor : tooling performance deficiency : installation |
| Supplementary | |
| Problem Areas | Aircraft Environmental Factor Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
On jul/xa/05; working hangar routine overnight check; we had an engine change. Everything was normal as all engine changes. The only difference was the cradle -- it was not an air carrier stand. We did it and did not exceed the maximum preload of 3850 pounds. We all thought it was a new model type and were not aware of the disconnect.
Original NASA ASRS Text
Title: A B737-300 ENG WAS CHANGED AND THE INSTALLED ENG WAS MOUNTED IN AN UNFAMILIAR AND NON STANDARD CRADLE. PRELOAD WAS NOT EXCEEDED.
Narrative: ON JUL/XA/05; WORKING HANGAR ROUTINE OVERNIGHT CHK; WE HAD AN ENG CHANGE. EVERYTHING WAS NORMAL AS ALL ENG CHANGES. THE ONLY DIFFERENCE WAS THE CRADLE -- IT WAS NOT AN ACR STAND. WE DID IT AND DID NOT EXCEED THE MAX PRELOAD OF 3850 LBS. WE ALL THOUGHT IT WAS A NEW MODEL TYPE AND WERE NOT AWARE OF THE DISCONNECT.
Data retrieved from NASA's ASRS site as of January 2009 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.