# SDR SWAA2021061772366

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 12, 2021
- Submitted: June 17, 2021
- Operation: Air carrier
- Aircraft: N732SW
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 27864
- Aircraft time: 74,727 hours, 43,976 cycles
- System (JASC): [5347 · Fuselage, Seat/Cargo Attach Fittings](https://openairdocs.org/jasc/5347)
- Part: Cargo Track
- Condition: Corroded
- Location: Bs 727d
- 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/SWAA2021061772366

## Discrepancy

CORROSION ON RAIL AT AFT CARGO BAY BS727D+6 RBL3 WL156. ; / COMPLETE;ET INSPECTED TRIM IAW 737 NDTM PART 6 51-00-00 PROCEDURE 23; NO CRACKS NOTED.<BR><BR>IS000450 N500D;INSTALLED RAIL SECTION AND SPLICE AT AFT CARGO BAY FROM BS727+4 - BS747+10 RBL3 WL156 IAW SRM 53-00-53-2R-2 PARA 4 (P-S) AND DWG 146A7500;LOCATED AND DRILLED REPAIR SECTION OF RAIL AT AFT CARGO BAY BS727+4 - BS747+10 RBL3 WL156 AND REPAIR SPLICE IAW SRM 53-00-53-2R-2 PARA 4 (I-O) OK TO INSTALL;RECEIVED CARGO RAIL FROM O.S.S; VERIFIED JOGGLED RAIL PER DWG 146A7503-4 ON PO# 824918-SWA AND VERIFIED DYE PENETRANT PER BAC5423 ON PO# 824918-SWA;REMOVED CORROSION ON RAIL AT AFT CARGO BAY BS727D+6 RBL3 WL156 IN A 2'X.90' AREA; ORIGINAL THICKNESS .063; REMAINING THICKNESS .053; FOUND TO BE OUT OF LIMITS IAW SRM 53-00-53-1A-2 PARA 4(A) 2 FIG.103 DEPTH GAGE ID ATS2473 S/N UNKNOWN; USED FOR MEASUREMENT;REMOVED DAMAGE SECTION OF RAIL IN AFT CARGO BAY FROM BS727+4 - BS747+10 RBL3 WL156 IAW SRM 53-00-53-2R-2;VERIFIED DAMAGE REMOVAL PER SRM;VERIFIED DAMAGE REMOVAL PER SRM.;VERIFIED INSTALLATION OF RAIL SECTION AND SPLICE IAW SRM 53-00-53-2R-2 AND DWG 146A7500.;VERIFIED LOCATION AND DRILLING OF RAIL SECTION PER SRM. VERIFIED OK TO INSTALL.;CORRECTED MATERIAL REMOVED FROM .015 TO .010;EVALUATION CONFIRMED

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