Service difficulty report · Failsafe · Boeing 747422

Difficulty date
January 6, 2014
Submitted
January 9, 2014
Operation
Air carrier
Aircraft
N181UA
Make and model
Boeing 747422
Aircraft serial
25278
Aircraft time
92,629 hours, 11,140 cycles
Engine
Pwa PW4056
Part
Failsafe
Condition
Cracked
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

RT BS 1120 TENSION TIE AREA ONE EACH FASTENER FOUND CRACK AT FAIL SAFE CHORD. MAIN DECK RT BS 1120 FRAME AFT FAIL SAFE CHORD CRACKED BETWEEN STRINGER 6R - 12R, CRACKED LENGTH 0.050, REPAIRED IAW SRM53-40-07, REPAIR 1, ITEM F.