Service difficulty report · Support · Boeing 737790

Difficulty date
August 6, 2022
Submitted
August 26, 2022
Operation
Air carrier
Aircraft
N560WN
Make and model
Boeing 737790
Aircraft serial
30542
Aircraft time
70,697 hours, 34,642 cycles
Part
Support
Condition
Corroded
Location
Fwd Cargo
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 FLOOR TO SIDEWALL SUPPORT AT FWD CARGO BAY LBL23 BS500A+2; BS500A+10. / [01] REMOVED CORROSION ON FWD CARGO BAY FLOOR TO SIDEWALL SUPPORT AT LBL 23 BS 500A+2DIMENSIONS L=1' W= 0.750 DEPTH:0.010' IAW SRM 51-10-02 PARAGRAPH 15 ; EVALUATED REWORKED AREA ;ORIGINAL MATERIAL THICKNESS 0.040' REMAINING THICKNESS : 0.030' AND FOUND TO BE OUT LIMITS; ALLOWABLE DAMAGE IAW SRM 53-00-53-1A-2;TOOL USED CALIPER ATS2739 S/N A22004232 DUE 04/2023.;[02] VERIFIED APPLICABILITY FOR ALLOWABLE DAMAGE LIMITS OF FCB FLOOR TO SIDEWALL SUPPORT;LBL 23WL 156 ; IAW SRM 53-00-53-1A-2 ALLOWABLE DAMAGE 2.;[03] :FABRICATED ; LOCATED AND DRILLED REPLACEMENT FLOOR TO SIDEWALL SUPPORT USING BAC1496-444#7075T62 LOT:1490548-1 IAW SRM 51-40-05-0G-0;; AND DWG 143A75001 ID:0001 REV: B. FABRICATED FLOOR TO SIDEWALL SUPPORT SPLICE REPAIR AT BTW B/S 480 TO BS 500 USING BAC1496-444#7075T62 LOT:1490548-1 IAW SRM 53-00-53-2R-6 AND SRM 51-40-05. APPLY CHEMICAL CONVERSION COATING AND PRIMER.