Service difficulty report · Shear Web · 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
Shear Web
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, ONE EACH FASTENER HOLE CRACK FOUND AT HORIZONTAL SHEAR WEB AT 12 O'CLOCK & 6 O'CLOCK POSITION THROUGH THICKNESS. MAIN DECK RT BS 1120 HORIZONTAL SHEAR WEB CRACKED, CRACK LENGTH 0.125, REPAIRED IAW SRM53-40-30 REPAIR 4, FIG 201.