# SDR SWAA2021091498714

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 27, 2021
- Submitted: September 14, 2021
- Operation: Air carrier
- Aircraft: [N446WN](https://openairdocs.org/aircraft/N446WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 29842
- Aircraft time: 58,476 hours, 34,391 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Retainer
- Condition: Broken
- Location: Bs 793 S23r
- 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/SWAA2021091498714

## Discrepancy

BROKEN INTERNAL STRUCTURE ON NUTPLATE RETAINER LOCATED BSTA 793.5; AT STRINGER 23R LEVEL AFT CARGO COMPARTMENT (1 EA) ; 2021-342099 / [01] REMOVED INTERNAL STRUCTURE ON NUTPLATE RETAINER LOCATED BSTA 793.5; AT STRINGER 23R LEVEL AFT CARGO COMPARTMENT IAW B737-700 SRM 51-40-02.PERFORMED VISUAL INSPECTION ON AREA AND NOT FOUND MORE DAMAGE AND NOT FOUND ALLOWABLE DAMAGES IN SRM B737-700 NUTPLATE RETAINER MUST BE REPLACED.; [02] MEASURE OF CRACK NUTPLATE RETAINER 0.641 INCH TOOL USED CALIPER P/N 700-113-10;S/N 0033174 AND DUE DATE: 08/JAN/2022; [03] STEP 1;2 COMPLETE; [04] MADE AND DRILLED NUTPLATE RETAINER LOCATED BSTA 793.5; AT STRINGER 23R LEVEL AFT CARGO COMPARTMENT IAW B737-700 SRM 51-40-05 AND DRAWING 143A8200 REV H; [05] STEP 4 COMPLETED; [06] APPLIED PROTECTIVE TREATMENT ON NUTPLATE RETAINER LOCATED BSTA 793.5; AT STRINGER 23R LEVEL AFT CARGO COMPARTMENT IAW B737-700 SRM 51-20-01; OK TO INSTALL NUTPLATE RETAINER LOCATED BSTA 793.5; AT STRINGER 23R LEVEL AFT CARGO COMPARTMENT AND FASTENERS; [07] OK TO INSTALL GRANTED.<BR><BR>STEP 6 COMPLETE.; [08] INSTALLED NUTPLATE RETAINER AND FASTENERS LOCATED BSTA 793.5; AT STRINGER 23R LEVEL AFT CARGO COMPARTMENT IAW B737-700 SRM 51-40-02 AND DRAWING 143A8200 REV - SHEET 44; [09] REPLACED NUTPLATE RETAINER LOCATED BSTA 793.5; AT STRINGER 23R LEVEL AFT CARGO COMPARTMENT IAW B737-700 SRM 51-10-02 AND DRAWING 143A8200 REV - SHEET 44; [10] STEP 8 COMPLETE.<BR><BR>TASK CARD COMPLETE.

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