# SDR DALA2023120810095

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 7, 2023
- Submitted: December 8, 2023
- Operation: Air carrier
- Aircraft: [N670DN](https://openairdocs.org/aircraft/N670DN), registered now
- Make and model: Boeing 757232
- Aircraft serial: 25331
- Aircraft time: 95,944 hours, 43,400 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Unknown
- Part number: UNKNOWN
- Condition: Unknown
- Location: Unknown
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2023120810095

## Discrepancy

SHIP 0670 CORROSION ON LOWER/UPPER SURFACE OF STRINGER RBL 7.55 BTW STA 1340 TO STA 1445 AT AFT CARGO COMPARTMENT. CORRECTIVE ACTION: SUMMARY OF NRC 00515: CORROSION WAS REMOVED PER B757-200 SRM 51-10 MENSUREMENT THICKNESS WAS ACCOMPLISHED ON LOWER/UPPER SURFACE OF STRINGER RBL 7.55 BTW STA 1340 TO STA 1445 AT AFT CARGO COMPARTMENT. ORIGINAL THICKNESS (OT) IS: 0.063 INCHES AND MINIMUM REMAINING THICKNESS (MRT): 0.42 INCHES PER B757-200 SRM 53-00 STRINGER RBL 7.55 BTW STA 1340 TO STA 1445 WAS REPLACED PER B757-200 SRM B757-200 SRM 51-40. (0099814)

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