Service difficulty report · Sidewall Support · Boeing 737

Difficulty date
August 12, 2022
Submitted
September 7, 2022
Operation
Air carrier
Aircraft
N8648A
Make and model
Boeing 737
Aircraft serial
42531
Aircraft time
27,511 hours, 12,724 cycles
Part
Sidewall Support
Part number
143A7501188
Condition
Corroded
Location
Fwd Cargo Bay
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 FWD CARGO BAY FLOOR TO SIDEWALL SUPPORT AT RBL 24 BS 500B+16; BS 500B+20; BS 500C+2; BS 500C+7; BS 500C+11; BS 500C+16; BS 500C+20; BS 500D+2; BS 500D+7; BS 500D+11. / [01] EVALUATED CORROSION AT ALL LOCATIONS; FOUND DEEPEST LOCATION TO BE AT BS 500C+20' REMOVED 0.015' IN A AREA OF 1'X1' ORIGINAL THICKNESS 0.040' FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2 USING ATS TOOL ID ATS2678 EXP 4/2023;[02] VERIFIED CORRECTIVE ACTION 1<BR><BR>VERIFIED MEASUREMENTS TABLE;[03] REMOVED FWD CARGO BAY FLOOR TO SIDEWALL SUPPORT R/H BS 500A TO 500I RBL 24 PER SRM 51-40-02-0G-0;[04] LOCATED AND DRILLED NEW FWD CARGO BAY FLOOR TO SIDEWALL SUPPORT R/H BS 500A TO 500I RBL 24 PER SRM 51-40-05-0G-0 AND DWG 143A7500<BR>OK TO INSTALL;[05] VERIFIED CORRECTIVE ACTION #4<BR>VERIFIED MEASUREMENT TABLE <BR>OK TO INSTALL GIVEN;[06] INSTALLED FWD CARGO BAY FLOOR TO SIDEWALL SUPPORT R/H BS 500A TO 500I RBL 24 PER SRM 51-40-02-0G-0 AND DWG 143A7500;[07] COMPLETED STEP 1;[08] VERIFIED CORRECTIVE ACTIONS 6 AND 7;[09] VERIFIED CORRECTIVE ACTIONS 6 AND 7