# SDR SWAA2021081190453

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 1, 2021
- Submitted: August 11, 2021
- Operation: Air carrier
- Aircraft: N750SA
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 29802
- Aircraft time: 75,691 hours, 44,551 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/SWAA2021081190453

## Discrepancy

CORROSION ON RAIL AT AFT CARGO BAY BS727D+6 RBL3 WL157 ; / [01] PREVIOUSLY REPAIR NOT ALLOWABLE DAMAGE PER SRM; [02] VERIFIED; [03] VERIFIED PREVIOUSLY REPAIR NOT ALLOWABLE DAMAGE PER SRM; [04] REMOVED DAMAGED U-CHANNEL AT ACB BS727D+6; RBL3 WL157 IAW SRM 51-00-53-2R-2; [05] REQUEST NDI TO CHECK FOR FREE CRACKS CONDITION ALONG THE CUT EDGES ON ACB RAIL BS 727D+6 RBL 3 WL 157 JOGGLE AREA.; [06] HFEC INSPECTED TRIMMED EDGE OF DAMAGE CUTOUT PER 737NDT PART 6 51-00-00 PROCEDURE 23. NO CRACKS FOUND. CAL ID IS000450 S/N N500D000M120071; [07] REPAIR APPLICABILITY- VERIFIED SRM 53-00-53-2R-2 REPAIR 2. ALTERNATIVE 5; FIG 203 DETAIL F IS APPLICABLE.; [08] VERIFIED SRM 53-00-53-2R-2 REPAIR 2. ALTERNATIVE 5; FIG 203 DETAIL F IS APPLICABLE.; [09] TRIMMED DAMAGED AREA L=3.2' X W= .9' UPPER FLANGE OF RAIL BEAM AT JOGGLE LOCATION IAW SRM 53-00-53-2R-2 PARAGRAPH 4 D.; [10] VERIFIED TRIM AT DAMAGED AREA L=3.2' X W= .9' UPPER FLANGE OF RAIL BEAM AT JOGGLE LOCATION IAW SRM 53-00-53-2R-2 PARAGRAPH 4 D; [11] ET INSPECTED CUT EDGE AND HOLES IAW 737 NDTM PART 6 51-00-00 PROCEDURE 23 AND PROCEDURE 16; NO CRACKS NOTED.<BR>CAL ID IS000450 N500D; [12] FABRICATED CHANNEL FROM BAC1510-1355 7050T76511 LOT # 1460992-1 LOCATED AND DRILLED IAW SRM CH 51-40-05. OK TO TREAT AND PRIME.;

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