Service difficulty report · Floorbeam · Boeing 747422

Difficulty date
November 18, 2013
Submitted
November 27, 2013
Operation
Air carrier
Aircraft
N120UA
Make and model
Boeing 747422
Aircraft serial
29166
Aircraft time
59,645 hours, 6,899 cycles
Engine
Pwa PW4056
Part
Floorbeam
Condition
Corroded
Location
Bs 520
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

'B' ZONE FLOORBEAM UPPER TEE FOUND CORRODED AT BS 520 LBL 3 TO RBL 8. FOUND OUT OF LIMITS IAW SRM 53-00-51 ALLOWABLE DAMAGE 1 FIG 101. FLOORBEAM REPAIRED LBL 33 TO RBL 33 IAW SRM 53-10-51 REPAIR 2 FIG 201.