Service difficulty report · Flap Track · Boeing 747341

Difficulty date
June 7, 2002
Submitted
June 18, 2002
Operation
Air carrier
Aircraft
N355MC
Make and model
Boeing 747341
Aircraft serial
23395
Part
Flap Track
Part number
65B1706870
Condition
Corroded
Location
Wing
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 (D) CHECK AT SIAEC, THE NR 5 FLAP TRACK O/B LOWER FLANGE IN THE MID SECTION WAS FOUND WITH LEVEL 1 CORROSION FOR APPROX 10 INCHES. CORROSION MACHINED OUT AND BLENDED MAINTAINING A 100 TO 1 BLEND RATIO TO ENSURE A SMOOTH FLAT SURFACE. AREA MAGNETIC PARTICLE INSPECTED TO ENSURE NO CRACKING DURING PROCESS. NO DEFECTS FOUND. AREA MEASURED AND RECORDED.