Narrative:

B757 work card is to accomplish FAA-ad 2008-22-24 RB211 fan blade root inspection. Currently the card is written as follows: method 1- is to remove fan blades and inspect [using] ultrasonic test (ut). Method 2- is to inspect blades in the engine (surface wave ut). On the field/line; method 2 is done first; then if indications are found; remove [fan blades] and accomplishment of method 1 is done to confirm 'crack' or 'no cracks'. In my experience; method 2 has a high rate of false crack indications. Suggest creating work card for field/line operation to accomplish method 2; then if needed; do method 1 or change work card.

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Original NASA ASRS Text

Title: A Line Maintenance Inspector suggests a change be implemented to their Job Cards to use the Method 2 Surface Wave Ultra-sonic Inspection first; for the RB-211 Fan Blade Root Inspection Airworthiness Directive (AD) callout; instead of Method 1; which requires removing the fan blades. On the Line; Method 2 is accomplished first; to determine if any crack indications are noted.

Narrative: B757 Work Card is to accomplish FAA-AD 2008-22-24 RB211 Fan Blade Root Inspection. Currently the Card is written as follows: Method 1- is to remove fan blades and inspect [using] Ultrasonic Test (UT). Method 2- is to inspect blades in the engine (Surface Wave UT). On the Field/Line; Method 2 is done first; then if indications are found; remove [fan blades] and accomplishment of Method 1 is done to confirm 'crack' or 'no cracks'. In my experience; Method 2 has a high rate of false crack indications. Suggest creating Work Card for Field/Line Operation to accomplish Method 2; then if needed; do Method 1 or change Work Card.

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.