Service difficulty report · Fitting · Boeing 7572B7

Difficulty date
February 7, 2008
Submitted
February 7, 2008
Operation
Air carrier
Aircraft
N903FD
Make and model
Boeing 7572B7
Aircraft serial
27124
Aircraft time
47,097 hours, 19,245 cycles
Part
Fitting
Part number
311N5033
Condition
Corroded
Location
Zone 400
Stage of operation
IN
How discovered
9
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

AFTER INSP FOR FINAL REAM FOUND NR 2 PYLON MID BULKHEAD FWD AND AFT LUG HOLES FOR SLEEVE BOLTS ACTUALLY REAMED TO .772", FOUND CORROSION ON EO NR F-5450-7-5005 PE STEP 10. HFEC INSPECTION FWD AND AFT SLEEVE BOLT HOLES IN THE NR 2 PYLON MID BULKHEAD FITTING PER NTM 51-00-00 PT.6 WITH NO DEFECTS NOTED. BOTH HOLES WERE REAMED TO REMOVE CORROSION. THE FWD HOLE WAS FOUND TO HAVE A SLEEVE BOLT REPAIR. FWD HOLE DIA .7714", AFT HOLE DIA .7774" HAVING A BELL SHAPED CONDITION. FWD BOLT HOLE WAS REAMED TO .880-.887" AND A SLEEVE BUSHING INSTALLED PER EA F-5450-110819. BOTH FWD AND AFT BOLT HOLES WERE REAMED TO .780 - .787" AND SB410YN10L34S SLEEVE BOLTS. INSTALLED PER EA NR F-5450-110819 DATED.

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