SDR 05007

Service difficulty report · Compressor · Boeing 7472B4B

Difficulty date: January 24, 2005
Submitted: January 28, 2005
Operation: Air carrier
Aircraft: N710CK
Make and model: Boeing 7472B4B
Aircraft serial: 21097
Aircraft time: 66,149 hours, 18,010 cycles
Engine: Pwa JT9D7J
Engine time: 80,296 hours, 14,118 cycles
System (JASC): 7230 · Turbine Engine Compressor Section
Part: Compressor
Condition: Stalled
Location: Nr 2 Engine
Part time: 80,296 hours, 14,118 cycles
Stage of operation: CL
How discovered: O
Nature of condition: R
Precautionary procedure: E

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

What was found

NR 2 ENGINE COMPRESSOR STALL AT 31,500 FT AND AGAIN AT FL350. ENGINE SHUTDOWN. REMOVED AND REPLACED NR 2 ENGINE. PERFORMED TEST NUMBERS 3, 6, 8, 9, 11, 12, AND 16. TRIM RUNS PERFORMED. OPS AND LEAK CHECK GOOD AND FINAL PARAMETERS RECORDED. ALL WORK PERFORMED IAW B747 MM 71-00-00.

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