Service difficulty report · Cam · Boeing 74747UF

Difficulty date
October 10, 2010
Submitted
October 11, 2010
Operation
Air carrier
Aircraft
N499MC
Make and model
Boeing 74747UF
Aircraft serial
29260
Aircraft time
44,430 hours, 7,712 cycles
Engine
Ge CF680
Part
Cam
Condition
Cracked
Location
Cargo Door
Stage of operation
IN
How discovered
V
Nature of condition
O
Precautionary procedure
K

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

What was found

DURING A-CHECK AND INSP IAW EO 4452A068, WEAR WAS FOUND IN THE MAIN DECK SIDE CARGO DOOR MIDSPAN LATCH CAM THAT IS OUTSIDE OF WEAR LIMITS IAW THE AMM 52-32-01-206. FWD MID SPAN LATCH CAM ID= 1.1740 , ALLOWED WEAR LIMITS IAW AMM IS 1.1240 (0.05). AFT MID SPAN LATCH CAM ID= 1.1445 , ALLOWED WEAR LIMITS IAW AMM IS 1.1240 (0.02). ACFT SCHEDULE PREVENTED REPLACEMENT OR REPAIR IAW THE OHM 52-36-75, SO THIS EO ISSUES A TEMPORARY REPAIR WHICH IS FAA APPROVED IAW DER (DERT710167-SW) VIA FAA FORM 8110-3 DATED 10OCT2010. PART 1 OF THIS EO DOCUMENTS THE WEAR OF THE FWD CAM AND THE AFT CAM OUTSIDE OF WEAR LIMITS IAW AMM 52-32-01-206. THE WEAR AREA IS CLEANED UP AND PRIMED AS A TEMPORARY REPAIR. PART 2 OF THIS EO WILL INSPECT THE CAMS BEFORE EACH FLIGHT FOR ADDITIONAL WEAR AND TO VERIFY THAT NO ADDITIONAL DAMAGE HAS OCCURRED AND TO TOUCH UP ANY DAMAGE PRIMER. PART 3 OF THIS EO WILL REPLACE THE DAMAGE CAMS OR REPAIR THEM IAW THE OHM.

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