Service difficulty report · Shaft · Boeing 73733A

Difficulty date
February 10, 2004
Submitted
March 24, 2004
Operation
Air carrier
Aircraft
N166AW
Make and model
Boeing 73733A
Aircraft serial
23627
Aircraft time
55,807 hours, 39,441 cycles
Engine
Ge CFM563B1
Part
Shaft
Part number
7064004
Part serial
11602V
Condition
Sheared
Location
Nr 2 Engine
Part time
48,200 hours, 31,741 cycles
Stage of operation
CR
How discovered
O
Nature of condition
M, J
Precautionary procedure
A

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

What was found

DURING FULL THRUST TAKEOFF OAT AT 13 DEG, NR 2 ENG EXCEEDED MAX EGT LIMIT, RED EGT WARNING LIGHT ILLUMINATED & EGT 947 DEG FOR 5 SECONDS. ON CLIMB NR 2 ENG RAN 105 DEG HOTTER THAN NR 1 AT 877 DEG. AT CRUISE NR 2 ENG 100 DEG HOTTER THAN NR 1 AT 716 DEG. MX REQUESTED BOTH PMC'S BE SWITCHED OFF, THROTTLE SPLIT WENT FROM NR 2 THRUST LEVER BEING FORWARD OF NR 1 BY 1.5 INCHES TO A SPLIT OF 2.5 INCHES. DECLARED EMERGENCY, DIVERTED. FOUND NR 2 ENG MAIN FLEX SHAFT BROKEN BETWEEN VARIABLE BLEED VALVE GEAR MOTOR & BLEED VALVE STOP MECHANISM. R&R NR 2 ENG MASTER VBV GEAR MOTOR AND STOP MECHANISM, EGT PARAMETERS GOOD ON ENG RUN OPS CHECK. VENDORS TEST OF MASTER VARIABLE BLEED VALVE GEAR MOTOR, NO FAULT FOUND.

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