# SDR SWAA2022081022005

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 23, 2022
- Submitted: August 10, 2022
- Operation: Air carrier
- Aircraft: [N951WN](https://openairdocs.org/aircraft/N951WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 36665
- Aircraft time: 39,132 hours, 23,683 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Bulkhead Web
- Part number: 143A948535
- Condition: Corroded
- Location: Fwd Cargo Bay
- 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/SWAA2022081022005

## Discrepancy

FWD CARGO BAY AFT BULKHEAD SUPPORT IS CORRODED; STA 500D; RBL23 TO LBL 25; WL 156. / [01] REMOVED CORROSION ON FWD CARGO AFT BULKHEAD SUPPORT AT BS 500D ;RBL 23 TO LBL 25; WL 156 ; DIMENSIONS L=1.5' W= 0.900' DEPTH:0.023' IAW SRM 51-10-02 PARAGRAPH 15 ; EVALUATED REWORKED AREA ;ORIGINAL MATERIAL THICKNESS 0.071' REMAINING THICKNESS : 0.048' AND FOUND TO BE OUT LIMITS; ALLOWABLE DAMAGE IAW SRM 53-30-08-1A-1 PARAGRAPH #4 (A) FIG#103 DETAIL 'C'TOOL USED MICROMETER ID ATS400 S/N UNKNOWN DUE 08/2022;[02] VERIFIED APPLICABILITY FOR ALLOWABLE DAMAGE LIMITS OF FCB R/H BULKHEAD SUPPORT;500D WL 156 RBL 23 TO LBL 25; IAW SRM 53-30-08-1A-1 ALLOWABLE DAMA 1;[03] CORRECCION STEP 2;<BR>VERIFIED APPLICABILITY FOR ALLOWABLE DAMAGE LIMITS OF FCB R/H BULKHEAD SUPPORT;500D WL 156 RBL 23 TO LBL 25; IAW SRM 53-30-08-1A-1 ALLOWABLE DAMAGE 1;[04] VERIFIED CORRECTIVE ACTION #1 AND #3;[05] RECEIVED NEW BULKHEAD SUPPORT ITEM: 143A9485Y35 LOT: 1479379-1. LOCATED AND DRILLED NEW BULKHEAD SUPPORT IAW SRM 51-40-05; COUNTERSINK IAW SRM 51-40-08 APPLIED CHEMICAL CONVERSION COATING IAW SRM 51-20-01. APPLIED PRIMER IAW SOPM 20-41-02;[06] RECEIVED NEW BULKHEAD SUPPORT ITEM: 143A9485Y35 LOT: 1479379-1. LOCATED AND DRILLED NEW BULKHEAD SUPPORT IAW SRM 51-40-05; COUNTERSINK IAW SRM 51-40-08 APPLIED CHEMICAL CONVERSION COATING IAW SRM 51-20-01. APPLIED PRIMER IAW SOPM 20-41-02

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