SDR 99UAL900635

Service difficulty report · Sill · Boeing 727222

Difficulty date: December 3, 1999
Submitted: March 26, 2000
Operation: Air carrier
Aircraft: N7462U
Make and model: Boeing 727222
Aircraft serial: 21916
Engine: Pwa JT8D15
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Sill
Condition: Damaged
Location: Bs 990
Stage of operation: IN
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 A HEAVY MAINTENANCE VISIT, CORROSION DAMAGE WAS FOUND IN TWO FASTENER HOLES COMMON TO THE AFT CARGO DOOR LOWER SILL OUTBOARD CHORD AT STATION 990. THE DISCREPANT HOLES WERE OVERSIZED TO .400 INCH DIAMETER TO REMOVE ALL THE DAMAGE AND FREEZE PLUGS. INSTALLED PER SRM 51-10-07. THIS REPAIR IS CONSIDERED MAJOR AND WAS APPROVED BY AN 8110-3 BY BOEING'S DER.