SDR UPS04442213

Service difficulty report · Rib · Boeing 747121

Difficulty date: March 29, 2004
Submitted: April 21, 2004
Operation: Air carrier
Aircraft: N683UP
Make and model: Boeing 747121
Aircraft serial: 20353
Aircraft time: 84,505 hours, 20,783 cycles
System (JASC): 5753 · Trailing Edge Flaps
Part: Rib
Part number: 65B078731
Condition: Corroded
Location: Nr 7 Flap
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

INSPECTION TYPE:C LEFT WING - NR 7 VC FLAP I/B ARM O/B RIB ROTARY ACTUATOR NR 1, 3, 4, 5, 7, 8 MOUNTING BOLT HOLES CORRODED (LOOK O/B, COUNTS CLOCKWISE FROM TOP). LEFT WING NR 7 VC FLAP OLES 974 I/B ARM O/B RIB ROTARY ACTUATOR NR 1, 3, 4, 5, 7, 8 MOUNTING BOLT HOLES OVERSIZED TO 0.371 INCH, BUSHINGS FABRICATED & INSTALLED.