SDR SAJFCALS100004

Service difficulty report · Arm · Boeing 747409

Difficulty date: January 22, 2011
Submitted: October 20, 2011
Operation: Air carrier
Aircraft: N18207
Make and model: Boeing 747409
Aircraft serial: 29219
Aircraft time: 56,805 hours, 10,108 cycles
Engine: Pwa PW4056
Engine time: 14,012 hours, 2,887 cycles
System (JASC): 7230 · Turbine Engine Compressor Section
Part: Arm
Condition: Failed
Location: Nr 2 Vsv
Stage of operation: CL
How discovered: O
Nature of condition: J
Precautionary procedure: A, E

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

What was found

B18207, IN ROUTE, DURING CLIMB PHASE (ALT 12,000 FEET), ENG 2 SURGED AND EGT OVER LIMIT(MAX. EGT 722?). ENG 2 IFSD AND AIRCRAFT TURNED BACK. VISUAL INSPECTION FOUND AN METAL PARTICLE ON EXHAUST NOZZLE, THE ENGINE WAS REMOVED FROM SERVICE. FOUND THE SIXTH STAGE VSV ARM FRACTURED AS WELL AS THE SIXTH STAGE COMPRESSOR BLADE FAILURE DUE TO THE VSV ARM FRACTURED.