# SDR SWAA2023041814199

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 8, 2023
- Submitted: April 18, 2023
- Operation: Air carrier
- Aircraft: [N281WN](https://openairdocs.org/aircraft/N281WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 36528
- Aircraft time: 51,516 hours, 31,045 cycles
- System (JASC): [5312 · Fuselage Main, Bulkhead](https://openairdocs.org/jasc/5312)
- Part: Bulkhead
- Condition: Delaminated
- Location: Zn 100 Fus Lower
- 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/SWAA2023041814199

## Discrepancy

PREVIOUS REPAIR STARTS TO DELAM AT LOWER L/H COMPOSITE BULKHEAD AT BS663 LBL33 WL161.<[01] IDENTIFIED IAW SRM 57-10-10-0I-2 FIGURE 2 TABLE 2 ITEM 4 <BR><BR>DAMAGE EXCEEDS ALLOWABLE DAMAGE LIMITS IAW SRM 57-10-10-1A-2 PAR.4 D(5)<BR><BR>DAMAGE TO BE REPAIRED IAW SRM 51-70-04-2R-10 AS DIRECTED BY SRM 57-10-10-2R-2 PAR.1 C(NOTE)<BR><BR>REMOVED PREVIOUS REPAIRS AND DAMAGED PLIES ON MULTIPLE AREAS; WITH THE LARGEST MEASURING 5'X3.5'; CLEANED; WITH NO CONTAMINATION NOTED IAW SRM 51-70-04-2R-10 PAR.4 A-C;[02] VALIDATED REPAIR PER SRM 51-70-04-2R-10;[03] VERIFIED CORRECTIVE ACTIONS 1 AND 2<BR><BR>VERIFIED MEASUREMENTS TABLE<BR><BR>VALIDATED REPAIR PER SRM 51-70-04-2R-10;[04] FABRICATED FWD SURFACE REPAIR PLIES USING BMS9-3 ST1581 LOT#1520142-1 IAW SRM 51-70-04-2R-10 PAR.4 D<BR><BR>OK TO INSTALL;[05] VERIFIED CORRECTIVE ACTION 4;[06] INSTALLED REPAIR PLIES USING BMS8-301 CL1 LOT#JH2EAA8895; VACUUM BAGGED; LEAK CHECKED GOOD USING VACUUM GAUGE ID:ATS2441 DUE:08/2023; AND SET TO CURE USING HOT BONDER ID:ATS2802 DUE:10/2023 IAW SRM 51-70-04-2R-10 PAR.4 D-F;[07] INSPECTED AND VERIFIED CORRECTIVE ACTION 6.;[08] CURED PLIES AND UNBAGGED PLIES IAW SRM 51-70-04-2R-10 PARAGRAPH 4.F;[09] FABRICATED AFT SURFACE REPAIR PLIES USING BMS9-3 ST1581 LOT#1520142-1 IAW SRM 51-70-04-2R-10 PAR.4 D<BR><BR>OK TO INSTALL

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