Service difficulty report · Bolt · Boeing 7472D3B

Difficulty date
July 13, 2006
Submitted
July 14, 2006
Operation
Air carrier
Aircraft
N505MC
Make and model
Boeing 7472D3B
Aircraft serial
21251
Aircraft time
92,862 hours, 20,318 cycles
Part
Bolt
Part number
BACB30US613X
Condition
Sheared
Location
Thrust Reverser
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

NR 3 LT REVERSER, CENTER HINGE FITTING 2 EACH BOLTS FRACTURED. REMOVED AND REPLACED CENTER HINGE FITTING AND BOLTS AS PER 747 SRM 51-30-05 TABLE I PAGE 6 AND SRM 51-30-04 TO NEXT OVERSIZED BOLT P/N BACB30US6K13Y. FASTENER HOLES WERE INSPECTED AS PER NDT MANUAL PART 6, 51-00-00 FIG 9. NO DEFECTS NOTED.

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