SDR UIEA01051

Service difficulty report · Flap Track · Boeing 747230B

Difficulty date: April 26, 2001
Submitted: May 17, 2001
Operation: Air carrier
Aircraft: N509MC
Make and model: Boeing 747230B
Aircraft serial: 21221
System (JASC): 5753 · Trailing Edge Flaps
Part: Flap Track
Part number: 65B170651
Condition: Corroded
Location: T/E Flap
Part time: 100,709 hours
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 INSPECTION FOUND, NR 1 FLAP TRACK AFT INBOARD REAR SPAR ATTACH MOUNT HOLE CORRODED. REAMED HOLE OVERSIZE TO 1.139 FEET, FABRICATED BUSHING. INSTALLED BUSHING PER STANDARD PRACTICES. REINSTALLED WITH STANDARD SIZE HARDWARE. NR 3 FLAP TRACK BOTH REAR SPAR ATTACH HOLES CORRODED. REAMED HOLES OVERSIZED TO 1.285 INCH. FABRICATED BUSHINGS. INSTALLED PER STANDARD PRACTICES. REINSTALLED WITH STANDARD SIZE HARDWARE. (M)