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Mechanic reports he inspected the #2 engine fan aft extension ring acoustical panel on a cfm-56 engine for bird strike damage. He released the B737-300 aircraft based upon his initial reading of maintenance manual (M/M) 72-00-00; item D; only to realize upon returning to shop; the damage was out of limits under item-east.
| Attributes | |
| ACN | 979501 |
| Time | |
| Date | 201111 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Fan Case |
| Person 1 | |
| Function | Technician |
| Qualification | Maintenance Airframe Maintenance Powerplant |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy |
Narrative:
Aircraft reported a bird strike [on the] #2 engine. Upon inspection; I found the fan aft extension ring acoustical panel damaged at approximately the five o'clock position. I reviewed the maintenance manual (acoustical panel inspection). While reading the manual; I saw item-D which included forward; middle; and aft acoustical panels. According to this section the damage was within limits. I inspected and released the aircraft based on these limits. The aircraft departed and I returned to the shop and upon further review of the paperwork; I realized I had misinterpreted the manual. Item-east is applicable to the item in question and the damage was out of limits. I called maintenance control and informed them of the discrepancy.
Original NASA ASRS Text
Title: Mechanic reports he inspected the #2 engine fan aft extension ring acoustical panel on a CFM-56 engine for bird strike damage. He released the B737-300 aircraft based upon his initial reading of Maintenance Manual (M/M) 72-00-00; Item D; only to realize upon returning to Shop; the damage was out of limits under Item-E.
Narrative: Aircraft reported a bird strike [on the] #2 engine. Upon inspection; I found the fan aft extension ring acoustical panel damaged at approximately the five o'clock position. I reviewed the Maintenance Manual (Acoustical Panel Inspection). While reading the manual; I saw Item-D which included forward; middle; and aft acoustical panels. According to this section the damage was within limits. I inspected and released the aircraft based on these limits. The aircraft departed and I returned to the Shop and upon further review of the paperwork; I realized I had misinterpreted the manual. Item-E is applicable to the item in question and the damage was out of limits. I called Maintenance Control and informed them of the discrepancy.
Data retrieved from NASA's ASRS site as of April 2012 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.