Service difficulty report · Actuator · Boeing 74747UF

Difficulty date
June 3, 2010
Submitted
June 3, 2010
Operation
Air carrier
Aircraft
N497MC
Make and model
Boeing 74747UF
Aircraft serial
29258
Aircraft time
48,411 hours, 7,418 cycles
Engine
Ge CF680
Part
Actuator
Condition
Leaking
Location
Rudder
Stage of operation
IN
How discovered
V
Nature of condition
K
Precautionary procedure
K

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

What was found

EO; 4455A041 IS TO DOCUMENT A MAJOR REPAIR. DURING REPLACEMENT OF UPPER RUDDER PCA (FOR LEAK), HIGH-LIFT CONTACTED RUDDER CAUSING DAMAGE TO RUDDER COMPOSITE STRUCTURE (REF FIGURE 1), MEASURING 12.0 IN. X 15.0 IN. DAMAGE IS BEYOND THE SRM LIMITS IAW THE SRM 55-40-01, FIGURE 101 (ALLOWABLE DAMAGE GENERAL). (DISPOSITION WAS MADE TO PERFORM A TIME LIMITED REPAIR AS DESCRIBED IN PART 1 WORK INSTRUCTIONS; SCHEDULE REPEAT INSPECTIONS AT EVERY 5 FC AND PERMANENT REPAIR AT THE NEXT D CHECK AFTER PART 1, SCHEDULED FOR JULY 2010 CHECK AFTER PART 1, IAW SRM 55-40-01, FIG. 201 (REPAIR GENERAL), TABLE I IAW SRM 51-70-07.

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