SDR 99UAL900408

Service difficulty report · Rib · Boeing 727222

Difficulty date: July 30, 1999
Submitted: March 26, 2000
Operation: Air carrier
Aircraft: N7451U
Make and model: Boeing 727222
Aircraft serial: 21905
Engine: Pwa JT8D15
System (JASC): 5712 · Wing, Rib/Bulkhead
Part: Rib
Condition: Cracked
Location: Ws 760.5
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 INSPECTION AND INSTALLATION OF THE PREVENTIVE MOD PER SERVICE BULLETIN727-57-0012 AS MANDATED BY AD94-07-08 AND AD90-06-09 ON THE LBL 70.5 RIB CHORD AT STATION 760.5 TWO CRACKED FASTENER HOLES WERE FOUND. FATIGUE. C0RRECTION, BOTH HOLES WERE OVERSIZED UNTIL THE CRACKS WERE ILLUMINATED AND OVERSIZED FASTENERS INSTALLED. THIS REPAIR WAS APPROVED AS AN ALTERNATE MEANS OF COMPLIANCE TO AD94-07-08 AND AD90-06-09 BY BOEING'S DER.