SDR CALA0500414

Service difficulty report · Engine · Boeing 737824

Difficulty date: November 22, 2005
Submitted: November 22, 2005
Operation: Air carrier
Aircraft: N18243
Make and model: Boeing 737824
Aircraft serial: 28806
Aircraft time: 19,397 hours, 7,003 cycles
Engine: Ge CFM56*
Engine time: 19,397 hours, 7,003 cycles
System (JASC): 7200 · Engine (Turbine/Turboprop)
Part: Engine
Condition: Failed
Location: Nr 1
Stage of operation: AP
How discovered: O
Nature of condition: Y, J
Precautionary procedure: O

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

What was found

THE NR 1 ENGINE SHUDDERED AND AUTO SHUTDOWN WHILE ON APPROACH TO IAH. THE CREW DECLARED AN EMERGENCY AND LANDED AT IAH WITHOUT INCIDENT. INITIAL EXAMINATION OF THE ENGINE REVEALED THAT THE NR 1 ENGINE INLET AND EXHAUST WERE CLEAN. THE NR 1 ENGINE WAS REMOVED AND REPLACED. ENGINEERING INVESTIGATION CONFIRMED THE ENGINE FAILURE. BOTH VSV ACTUATORS WERE COMPLETELY OFF DEMAND SCHEDULE. THAT LED TO THE ENGINE STALL AND SUBSEQUENT ROLL TO SUB-IDLE AND ENGINE SHUT DOWN.