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.

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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.