SDR ASMF201102003

Service difficulty report · Blades · Boeing 7772Q8

Difficulty date: February 14, 2011
Submitted: February 24, 2011
Operation: Air carrier
Aircraft: N774AM
Make and model: Boeing 7772Q8
Aircraft serial: 28689
Aircraft time: 37,605 hours, 6,073 cycles
Engine: Ge GE9094B
Engine time: 18,601 hours, 2,084 cycles
System (JASC): 7230 · Turbine Engine Compressor Section
Part: Blades
Condition: Damaged
Location: Rt Engine
Stage of operation: IN
How discovered: 9
Nature of condition: O
Precautionary procedure: K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

DURING A BORESCOPE INSPECTION OF THE HPC 1ST STAGE BLADES OF RIGHT ENGINE WAS DETECTED FOUR BLADES OF THE HPC 1ST STAGE WITH LEADING EDGE TIP CURLED 45 DEGREES OUT OF LIMITS IAW 72-00-00, PARAGRAPH 5H (8) C (7), PAGE 625; WITH DIMENSIONS OF 1.0 INCHES LENGTH AND 2.0 INCHES WIDE, COVERING AN AREA OF 2.0125 SQUARE INCHES. MAINTENANCE PERSONNEL REPLACED AND TESTED THE RIGHT ENGINE IAW MM 71-00-02 AND MM 71-00-00, ALL CORRECT.

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