SDR 2006UALA00997

Service difficulty report · Shim · Boeing 777222

Difficulty date: May 24, 2006
Submitted: May 30, 2006
Operation: Air carrier
Aircraft: N788UA
Make and model: Boeing 777222
Aircraft serial: 26942
Aircraft time: 39,381 hours, 6,013 cycles
Engine: Pwa PW4090
System (JASC): 5314 · Fuselage Main, Keel
Part: Shim
Condition: Migrated
Location: Bs 1434, Keel
Stage of operation: IN
How discovered: 9
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

FOUND STA 1434, RT KEEL BEAM FITTING, SHIM IS MIGRATED. BS 1434, RH KEEL BEAM FITTING, SHIM IS MIGRATED. REMOVED BROKEN SHIM, ACP HEFC INSP OF HOLES AND SPLICE PLATES FOR CRACK, NO CRACK FOUND. MANUFACTURED SOLID SHIM AND REINSTALL. SHIM MIGRATION TYPICALLY CAUSED BY IMPROPER CONTACT SURFACE MATCH OR INADEQUATE TENSION ON FASTENERS.