SDR UPS01437164

Service difficulty report · Sill · Boeing 747121

Difficulty date: October 6, 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 FX - LEFT BS 1350 UPPER AFT SHEAR / BATHTUB ATTACH FITTING LWR SILL O/B FLANGE AFT HOLE FOUND CORROSION AFTER BOLT REMOVAL. FX - LEFT BS 1350 UPPER AFT SHEAR / BATHTUB ATTACH FITTING LWR SILL O/B FLANGE AFT HOLE CORROSION CLEANED UP AFTER HOLE REAMED TO FINAL SIZE 0.812 INCH. REPAIRED CARRIED OUT AS PER HX RS R53-43-34687 ITEM C3.