Service difficulty report · None · Boeing 737*

Difficulty date
October 6, 2021
Submitted
November 22, 2021
Operation
Air carrier
Aircraft
N450WN
Make and model
Boeing 737*
Aircraft serial
32470
Aircraft time
58,641 hours, 34,716 cycles
Part
None
Condition
Corroded
Location
Fuselage
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

CORROSION ON BS 986 BEAM UPPER CHORD BS 986 LBL 44 WL208 ; / [01] REMOVED CORROSION ON BS 986 BEAM UPPER CHORD BS 986 LBL 44 WL 208 IN AREA OF 1.1' BY 1.8' BY A MAXIMUM DEPTH OF 0.080' PER SRM 51-10-02-0G-0 AND SRM 53-70-51-1A-1. OUT OF LIMITS PER SRM 53-70-51-1A-1.[18] LOCATED AND DRILLED NEW ANGLE ITEM 5(4EA) OBTAINED FROM COSTUMER KIT BS986 SI 7530799 ALL I.A.W SRM 53-70-51-2R-4 REPAIR 4 ALTERNATIVE 2 PAR 4.G-M TABLE 201 OK TO INSTALL; [19] OK TO INSTALL ALL REMOVED PARTS FOR ACCESS COMMON TO REPAIR AREA.; [20] VERIFIED CORRECTIVE ACTION 17;18 AND 19.; [21] INSTALLED REPAIR PARTS BS986 LBL1-LBL50 ITEM 1 T-CHORD(1EA);ITEM 2 ANGLE(2EA);ITEM 3 ANGLE(2EA);ITEM 4 STRAP(2EA) ITEM 7 SHEAR TIE (1EA) I.A.W SRM 53-70-51-2R-4 REPAIR 4 ALTERNATIVE 2 PAR 4.N-O; [22] VERIFIED CORRECTIVE ACTION 21.; [23] VERIFY INSTALLATION ITEM 1-7; [24] VERIFIED STEPS 1-7 COMPLETE.; [25] ALL RII STEPS ARE COMPLETE.; [26] COMPLETED ALL REPAIR STEPS ON BS986 LBL1-LBL50 WL208 PER SRM 53-70-51-2R-4 REPAIR 4 ALTERNATIVE 2; [27] VERIFIED CORRECTIVE ACTION 26.; [28] UPDATED MEASUREMENT TABLE ITEM 14; [29] UPDATED MEASUREMENT TABLE ITEM 14