Service difficulty report · None · Boeing 737*

Difficulty date
February 10, 2022
Submitted
March 15, 2022
Operation
Air carrier
Aircraft
N465WN
Make and model
Boeing 737*
Aircraft serial
33829
Aircraft time
59,870 hours, 35,575 cycles
Part
None
Condition
Corroded
Location
Aft Fuselage
Stage of operation
UK
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

CORROSION ON THE BS 986.5 FLOOR BEAM UPPER FLANGE AT FASTENER HOLES LBL-45 TO RBL-45 WL-208. / [01] PARTIALLY COMPLETED STEPS 1 & 2;[23] FABRICATED -1 T-CHORD FROM BAC1505-101474 7050-T76511 LOT#1412519-1; -2 ANGLES FROM BAC1490-2811#7075T62 CLAD LOT#1453731-1; -3 ANGLES FROM BAC1490-2887#7075T62 CLAD LOT#1382473-2; -4 STRAPS FROM 7075T6#0.080' CLAD LOT#1379745-2 AND 4 EA STRUCTURAL SHIMS FROM 7075T6#0.090' CLAD LOT# 1449283-1. TREATED ALL REPAIR PARTS IAW SRM 53-70-51-2R-4 REPAIR 4 AND IAW EA#22-153-00452. OK TO PRIME REPAIR PARTS.25] LOCATED AND DRILLED 2 EA NEW SHEAR TIES BEWEEN STR 17-STR18 L/H & RH; 4 EA CLIPS PN# 147A5615-5/6 AT LBL 20.7 & 33.8 IAW SRM 51-40-05; IAW SRM 53-70-51-2R-4 REPAIR 4 AND IAW EA# 22-153-00452-WIP1. OK TO INSTALL;[31] PRIMED ALL REPAIR PARTS ON ITEM 23 ABOVE AND REFWORKED AREA IAW SRM 53-70-51-2R-4 REPAIR 4... OK TO INSTALL;[32] VERIFIED CORRECTIVE ACTION ENTRY 31.<BR><BR>OK TO INSTALL REPAIR PARTS;[33] FABRICATED; LOCATED AND DRILLED 4 EA FITTINGS ON ITEM 27 ABOVE AND 4 EA SHIMS FROM 7075T6#0.020' CLAD LOT#1472548-1. TREATED IAW SRM 53-70-51-2R-4 REPAIR 4 AND IAW EA#22-153-00452-WIP1. OK TO PRIME REPAIR PARTS;[34] VERIFIED CORRECTIVE ACTION ENTRY 33.<BR><BR>OK TO PRIME REPAIR FITTINGS AND SHIMS;[35] PRIMED 4 EA FITTINGS AND 4 EA SHIMS IAW SRM 53-70-51-2R-4 REPAIR 4... OK TO INSTALL;[36] VERIFIED CORRECTIVE