Service difficulty report · Bolt · Boeing 7472R7F

Difficulty date
November 17, 2000
Submitted
December 29, 2000
Operation
Air carrier
Filed by
ERKR675D
Marana Aerospace Solutions Inc
Aircraft
N639FE
Make and model
Boeing 7472R7F
Aircraft serial
21650
Aircraft time
64,455 hours, 14,952 cycles
Part
Bolt
Part number
69B147862
Condition
Broken
Location
Trunnion
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

ON VISUAL INSPECTION, 2 BOLT (PN 69B14786-2) HEADS WERE FOUND LOOSE ON TOP OF RT MLG BODY GEAR INBOARD TRUNNION SUPPORT FITTING. UPON REMOVAL OF SEALANT ON ATTACHING NUTS, NUTS WITH SHEARED SECTION OF BOLTS FELL FROM FITTING. BOLTS ARE OUTBOARD AND CENTER BOLTS OF 3 IN RT INBOARD FITTING. ONE BOLT HAD SURFACE CORROSION ON BOTH SECTIONS AT SHEAR POINT, INDICATIVE OF LONG PRE-EXISTING CONDITION. THE OTHER BOLT WAS RELATIVELY CLEAN. NO TORQUE WAS APPLIED TO EITHER BOLT AND LOWER HALF OF SHEARED BOLTS WITH NUTS HAD BEEN RETAINED BY ENCAPSULATION (SEALANT). (X)

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