Service difficulty report · Flap Track · Boeing 7472F6B

Difficulty date
October 24, 2002
Submitted
November 20, 2002
Operation
Air carrier
Aircraft
N535MC
Make and model
Boeing 7472F6B
Aircraft serial
21833
Engine
Ge CF650*
Part
Flap Track
Part number
65B170636
Condition
Corroded
Location
Nr 6
Part time
81,995 hours, 16,861 cycles
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 CURRENT "C" CHECK, FOUND NR 6 FLAP OUTBOARD BUSHING OF PIVOT FITTING LOOSE. DISASSEMBLY REVEALED CORROSION ON THE LEFT SIDE TO SIDE LOAD FITTING ON CONTACT AREAS, (NO CORROSION LEVEL DECLARED). REMOVED TRACK, ROUTED TO SHOP. MACHINED FLAP TRACK FLANGES TO REMOVE CORROSION. NDI INSPECTED TO ENSURE CORROSION REMOVAL. NO FINDINGS. SHOT PEENED AND REFINISHED REWORK AREA. FABRICATED REPLACEMENT BEARING PLATES TO COMPENSATE FOR REMOVED MATERIAL IAW STANDARD OVERHAUL PRACTICE. TRACK OVERHAULED AND RESTORED TO ORIGINAL STANDARDS IAW MM. REINSTALLED FLAP TRACK.

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