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A B737-300 aircraft #1 engine was found to have a missing pylon panel by a downline station after maintenance 'C' check.
| Attributes | |
| ACN | 731106 |
| Time | |
| Date | 200703 |
| 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 | B737-300 |
| 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 : airframe technician : powerplant |
| ASRS Report | 731106 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : inspector |
| ASRS Report | 731108 |
| Events | |
| Anomaly | aircraft equipment problem : less severe maintenance problem : improper maintenance non adherence : published procedure non adherence : far |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other |
| Factors | |
| Maintenance | performance deficiency : installation performance deficiency : inspection |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Aircraft |
| Primary Problem | Maintenance Human Performance |
Narrative:
I was informed that pylon panel 5727L was missing from aircraft. After maintenance during 'C' check in ZZZ; during the check the panel was removed for inspection. After the inspection; I reinstalled the panel; torqued fasteners with lock position indicators in proper alignment. So you can see how surprised I was to hear the panel departed the plane. Supplemental information from acn 731108: inspected all access panels on #1 engine pylon for incorrect installation and alignment of index marks on all fasteners. I saw no problems with any panels.
Original NASA ASRS Text
Title: A B737-300 ACFT #1 ENGINE WAS FOUND TO HAVE A MISSING PYLON PANEL BY A DOWNLINE STATION AFTER MAINT 'C' CHECK.
Narrative: I WAS INFORMED THAT PYLON PANEL 5727L WAS MISSING FROM ACFT. AFTER MAINT DURING 'C' CHK IN ZZZ; DURING THE CHK THE PANEL WAS REMOVED FOR INSPECTION. AFTER THE INSPECTION; I REINSTALLED THE PANEL; TORQUED FASTENERS WITH LOCK POS INDICATORS IN PROPER ALIGNMENT. SO YOU CAN SEE HOW SURPRISED I WAS TO HEAR THE PANEL DEPARTED THE PLANE. SUPPLEMENTAL INFO FROM ACN 731108: INSPECTED ALL ACCESS PANELS ON #1 ENG PYLON FOR INCORRECT INSTALLATION AND ALIGNMENT OF INDEX MARKS ON ALL FASTENERS. I SAW NO PROBS WITH ANY PANELS.
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.