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A B737-500 had #1 engine replaced due to low pressure turbine blade damage. FAA letter notes lead technician that signed off the engine change did not describe blade damage and troubleshooting procedures.
| Attributes | |
| ACN | 693415 |
| Time | |
| Date | 200603 |
| 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 | B737-500 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : lead technician |
| ASRS Report | 693415 |
| Person 2 | |
| Affiliation | government : faa |
| Function | other personnel other |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper documentation non adherence : published procedure non adherence : far |
| Independent Detector | other other : 2 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | faa : investigated other other |
| Factors | |
| Maintenance | performance deficiency : non compliance with legal requirements performance deficiency : logbook entry performance deficiency : fault isolation |
| Supplementary | |
| Problem Areas | Maintenance Human Performance FAA Aircraft |
| Primary Problem | FAA |
Narrative:
Aircraft had an in-flight engine shutdown. Returned to ZZZ. Declared an emergency. #1 engine low pressure turbine blades were found bad. FAA letter file number noted no description damage to the engine or air carrier X or what troubleshooting activities that resulted in the removal and replacement of the engine. When I was given my turn-over; the engine was off the pylon; precooler was removed. The nose cowl changed to the replacement engine. I was told for my crew to finish the engine change. My signoff was removed and replaced #1 engine per maintenance task 371-00-01. Maintenance task 371-00-02; maintenance task 371-00-10; maintenance task 371-00-13. However; next time I will include in signoff what was wrong and troubleshoot used next time.
Original NASA ASRS Text
Title: A B737-500 HAD #1 ENG REPLACED DUE TO LOW PRESSURE TURBINE BLADE DAMAGE. FAA LETTER NOTES LEAD TECHNICIAN THAT SIGNED OFF THE ENG CHANGE DID NOT DESCRIBE BLADE DAMAGE AND TROUBLESHOOTING PROCS.
Narrative: ACFT HAD AN INFLT ENG SHUTDOWN. RETURNED TO ZZZ. DECLARED AN EMER. #1 ENG LOW PRESSURE TURBINE BLADES WERE FOUND BAD. FAA LETTER FILE NUMBER NOTED NO DESCRIPTION DAMAGE TO THE ENG OR ACR X OR WHAT TROUBLESHOOTING ACTIVITIES THAT RESULTED IN THE REMOVAL AND REPLACEMENT OF THE ENG. WHEN I WAS GIVEN MY TURN-OVER; THE ENG WAS OFF THE PYLON; PRECOOLER WAS REMOVED. THE NOSE COWL CHANGED TO THE REPLACEMENT ENG. I WAS TOLD FOR MY CREW TO FINISH THE ENG CHANGE. MY SIGNOFF WAS REMOVED AND REPLACED #1 ENG PER MAINT TASK 371-00-01. MAINT TASK 371-00-02; MAINT TASK 371-00-10; MAINT TASK 371-00-13. HOWEVER; NEXT TIME I WILL INCLUDE IN SIGNOFF WHAT WAS WRONG AND TROUBLESHOOT USED NEXT TIME.
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.