SDR UPS01437170

Service difficulty report · Sill · Boeing 747121

Difficulty date: October 10, 2001
Submitted: October 26, 2001
Operation: Air carrier
Aircraft: N681UP
Make and model: Boeing 747121
Aircraft serial: 19661
Aircraft time: 97,510 hours, 25,124 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Sill
Condition: Corroded
Location: Fuselage
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 BS 1350 ATTACH FITTING LWR SILL CTR BOLT HOLE BORE COMMON TO FWD UPPER BATHTUB FITTING BASE HOLE FOUND CORROSION AFTER BOLT REMOVAL. LEFT BS 1350 ATTACH FITTING LWR SILL CTR BOLT HOLE BORE COMMON TO FWD UPPER BATHTUB FITTING BASE HOLE REAMED 1.343 INCH AND CONFIRM CORROSION CLEANED UP, HOLE FINALLY OVERSIZED TO 1.375 INCH AND BOLT P/N BACB30US22K86, INSTALLED TOGETHER WITH TAPE FILLER AND ALIGNMENT WASHER SA PER HX RS R53-43-34687 ITEM C3 REQUIREMENT.