SDR 2007UALA00071

Service difficulty report · Compressor · Boeing 737322

Difficulty date: January 8, 2007
Submitted: January 16, 2007
Operation: Air carrier
Aircraft: N366UA
Make and model: Boeing 737322
Aircraft serial: 24535
Aircraft time: 48,873 hours, 34,413 cycles
Engine: Cfmint CFM563C1
Engine time: 42,267 hours, 25,295 cycles
System (JASC): 7230 · Turbine Engine Compressor Section
Part: Compressor
Condition: Stalled
Location: Nr 1 Engine
Stage of operation: DE
How discovered: O
Nature of condition: R, J
Precautionary procedure: O

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

What was found

NR 1 COMPRESSOR STALL IN DESCENT. [SUP 4-17-07] CAUSE WAS CIT SENSOR NOT RESPONDING TO TEMPERATURE CHANGE. REPLACED CIT SENSOR AND MAIN ENGINE CONTROL UNIT. MEC BENCH TEST FOUND NO FAULTS. CIT SENSOR DID NOT RESPOND TO TEMPERATURE CHANGE. BOTH UNITS MADE SERVICEABLE.