SDR UIEA9996

Service difficulty report · Bolt · Boeing 7472D7B

Difficulty date
November 4, 1999
Submitted
March 26, 2000
Operation
Air carrier
Aircraft
N528MC
Make and model
Boeing 7472D7B
Aircraft serial
22472
Part
Bolt
Part number
BACB30LM58P
Condition
Loose
Location
Nr 2 Te Aft Flap
Part time
60,910 hours
Stage of operation
IN
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

INSPECTION OF NR 2 INBOARD AFT FLAP TRACK CARRIAGE BOGIE PIN ASSY REVEALED SAFETY BOLT MIGRATED OVER .50 INCH. NO PIN MIGRATION DUE PIN HELD IN PLACE BY ROLLER SUPPORT ROD. THIS CONFIGURATION DOES NOT REQUIRE SAFETY WIRE FROM BOLT TO PIN. REMOVED BOLT, INSPECTED, FOUND OK. RE-INSTALLED AND TORQUED TO 240 INCHES - 260 INCHES PER BOEING RECOMMENDATION. RE-TORQUED REMAINING SEVEN POSITIONS PRECAUTIONARY. ATLAS AIR IS CURRENTLY PROCESSING AN FCD TO INSPECT THE REMAINDER OF THE -200 FLEET. ATLAS WILL ALSO CREATE A TASK CARD TO ROUTINELY RE-TORQUE SAFETY BOLT DURING A-CHECKS UNTIL THE PIN AND BOLT COMBINATION CAN BE REPLACED WITH A DRILLED ASSEMBLY. (X)

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