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A B737-700 engine inspector reports finding all fan blade retaining ring platform pins on #1 engine intact during a scheduled check. Later check found pins missing.
| Attributes | |
| ACN | 597693 |
| Time | |
| Date | 200310 |
| Day | Thu |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : inspector |
| Qualification | technician : airframe technician : powerplant |
| ASRS Report | 597693 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : published procedure non adherence : far |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : non compliance with legal requirements performance deficiency : scheduled maintenance performance deficiency : logbook entry performance deficiency : installation performance deficiency : inspection |
| Supplementary | |
| Problem Areas | Aircraft Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
On oct/thu/03, was found that all the blade retaining ring platform pins for the #1 engine were missing. Several checks of the #1 engine platform pins were performed at various times (scheduled) prior to the oct/thu/03 check. On mar/thu/03, I was assigned to #1 engine 'C' check, I performed blade installation and front and rear spinner installation. To the best of my knowledge all parts were accounted for and properly installed.
Original NASA ASRS Text
Title: A B737-700 ENG INSPECTOR RPTS FINDING ALL FAN BLADE RETAINING RING PLATFORM PINS ON #1 ENG INTACT DURING A SCHEDULED CHK. LATER CHK FOUND PINS MISSING.
Narrative: ON OCT/THU/03, WAS FOUND THAT ALL THE BLADE RETAINING RING PLATFORM PINS FOR THE #1 ENG WERE MISSING. SEVERAL CHKS OF THE #1 ENG PLATFORM PINS WERE PERFORMED AT VARIOUS TIMES (SCHEDULED) PRIOR TO THE OCT/THU/03 CHK. ON MAR/THU/03, I WAS ASSIGNED TO #1 ENG 'C' CHK, I PERFORMED BLADE INSTALLATION AND FRONT AND REAR SPINNER INSTALLATION. TO THE BEST OF MY KNOWLEDGE ALL PARTS WERE ACCOUNTED FOR AND PROPERLY INSTALLED.
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.