Service difficulty report · Failsafe · Boeing 747422

Difficulty date
December 21, 2009
Submitted
December 21, 2009
Operation
Air carrier
Aircraft
N171UA
Make and model
Boeing 747422
Aircraft serial
24322
Aircraft time
76,508 hours, 9,128 cycles
Engine
Pwa PW4056
Part
Failsafe
Condition
Cracked
Location
Bs 1140
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

UPPER DECK FRAME FAIL-SAFE CHORD CRACKED AT BS 1140 RT. MAJOR REPAIR ACCOMPLISHED: SPLICED IN NEW SECTION OF FAIL-SAFE CHORD.