# SDR SWAA2023030697207
- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 31, 2023
- Submitted: March 6, 2023
- Operation: Air carrier
- Aircraft: [N7885A](https://openairdocs.org/aircraft/N7885A), registered now
- Make and model: Boeing 737-76N
- Registry model: [Boeing 737-76N](https://openairdocs.org/model/boeing-737-76n) (OpenAirDocs)
- Aircraft serial: 33379
- Aircraft time: 62,518 hours, 31,343 cycles
- System (JASC): [5320 ยท Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Rail
- Condition: Carboned
- 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/SWAA2023030697207
## Discrepancy
CORROSION ON AFT CARGO BAY RAIL AT LBL 3 BS 767+6.<[01] VERIFIED APPLICABILITY PER REF SRM 53-60-53-0I-2 AND SRM 53-00-53-1A-2
REMOVED CORROSION ON DISCREPANCY AREA L=2 W= .7 ;THE LOST MATERIAL IS MORE THAN 50% THEREFORE FOUND TO BE OUT OF LIMITS PER REF SRM SRM 53-00-53-1A-2;[02] VERIFIED CORRECTIVE ACTION 1 AND THE MEASUREMENT TABLE.;[03] VERIFIED PPLICABILITY PER REF SRM 53-00-53-2R -2 ALTERNATIVE 5
REMOVED DAMAGE SECTION L=2.8 '' ON AFT CARGO BAY RAIL AT LBL 3 BS 767+6. PER REF SRM 53-00-53-2R -2;[04] VERIFIED SRM APPLICABILITY AND DAMAGE REMOVAL IN CORRECTIVE ACTION 3;[05] REQUIRE NDI INSPECTION FOR CRACK FREE CONDITION;[06] ACCOMPLISHED HFEC SURFACE SCAN OF CUTOUT IAW 737 NDTM PART 6 CHAPTER 51-00-00 PROCEDURE 23. NO CRACKS NOTED.
EQUIPMENT USED: NORTEC 600 ID: ATS1465 CAL DUE: 09/2023;[07] LOCATED AND DRILLED REPAIR CHANNEL 53100004-001 PO NBR 905331 PER REF SRM 53-00-53-2R -2 AND SRM 51-40-05
APPLIED CHEMICAL CONVERSION COATING AND PRIME AT CUT OUT AREA PER REF SRM 53-00-53-2R -2
OK TO INSTALL REPAIR CHANNEL;[08] VERIFIED LOCATED AND DRILLED REPAIR CHANNEL 53100004-001 PO NBR 905331 PER REF SRM 53-00-53-2R -2 AND SRM 51-40-05.
APPLIED CHEMICAL CONVERSION COATING AND PRIME AT CUT OUT AREA PER REF SRM 53-00-53-2R -2.;
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