# SDR SWAA2022091549153

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 1, 2022
- Submitted: September 15, 2022
- Operation: Air carrier
- Aircraft: [N8502Z](https://openairdocs.org/aircraft/N8502Z), registered now
- Make and model: Boeing 737-8H4
- Registry model: [Boeing 737-8H4](https://openairdocs.org/model/boeing-737-8h4) (OpenAirDocs)
- Aircraft serial: 36666
- Aircraft time: 19,989 hours, 9,530 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Support
- Condition: Corroded
- Location: Fwd Cargo
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2022091549153

## Discrepancy

CORROSION ON FWD CARGO BAY AFT LOWER BULKHEAD SUPPORT BS500I RBL20 TO LBL20 WL156 / [01] EVALUATED CORROSION AT ALL LOCATIONS OF BULKHEAD SUPPORT; FOUND THE DEEPEST LOCATION TO BE AT BS 500I RBL 20 WL 156; FOUND 0.020 REMOVED FROM ORIG 0.071 IN NUMEROUS 1'X1' AREAS; FOUND TO BE OUT OF LIMITS PER SRM 53-30-08-1A-1 USING DIAL DEPTH GAUGE ATS 2678 DUE 04/2023;[02] VERIFIED CORRECTIVE ACTION #1 AND MEASUREMENT FIELD;[03] REMOVED FCB AFT LOWER BULKHEAD SUPPORT AT BS500I; RBL20 - LBL20; WL156 PER SRM 51-40-02-0G-0;[04] LOCATED; DRILLED; AND DEBURRED NEW FCB AFT LOWER BULKHEAD SUPPORT BS 500I; RBL 20 TO LBL 20; WL 156 IAW SRM 51-40-05-0G-0; DWG #143A7902. OK TO INSTALL.;[05] VERIFIED CORRECTIVE ACTION 4; OK TO INSTALL GIVEN.;[06] VERIFIED MEASUREMENT TABLE.;[07] INSTALLED NEW FCB AFT LOWER BULKHEAD SUPPORT BS 500I; RBL 20 TO LBL 20; WL 156 IAW SRM 51-40-02-0G-0; DWG #143A7902.;[08] VERIFIED MEASUREMENT TABLE.;[09] ADDED PARTS;[10] VERIFIED CORRECTIVE ACTION 7

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