# SDR SWAA2021100116936

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 10, 2021
- Submitted: April 27, 2022
- Operation: Air carrier
- Aircraft: [N7751A](https://openairdocs.org/aircraft/N7751A), registered now
- Make and model: Boeing 737-7BD
- Registry model: [Boeing 737-7BD](https://openairdocs.org/model/boeing-737-7bd) (OpenAirDocs)
- Aircraft serial: 36717
- Aircraft time: 43,609 hours, 22,223 cycles
- System (JASC): [5347 · Fuselage, Seat/Cargo Attach Fittings](https://openairdocs.org/jasc/5347)
- Part: Cargo Track
- Part number: 146A7501
- Condition: Corroded
- Location: Aft 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/SWAA2021100116936

## Discrepancy

CORROSION AFT CARGO BAY TRACK TIE DOWN BS747 RBL14 WL156 ; / [01] REMOVED CORROSION ON AFT CARGO BAY TRACK TIE DOWN BS.747 LBL14 WL156. REWORKED AREA DIMENSIONS L=2.0' W=1.0' D=0.019'. MAXIMUM ALLOWED MATERIAL LOSS 0.040'. FOUND TO BE WITHIN LIMITS PER SRM 53-00-53-1A-2 PARAGRAPH 4.B(2) FIGURE 103 DETAIL G. <BR>TOOL USED DEPTH GAGE ID:ATS1737 S/N:UNKNOWN; [02] CORRECTION:BS747 RBL14 WL156; [03] VERIFIED CORRECTIVE ACTION ENTRIES 1. AND 2.; [04] APPLIED CHEMICAL CONVERSION COATING AND PRIMER TO REWORKED AREAS PER AMM 51-21-41-370-802 AND AMM 51-21-72-370-804; [05] VERIFIED CORRECTIVE ACTION ENTRY 4.

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