# SDR IPXA2022032180321

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 2, 2022
- Submitted: March 21, 2022
- Operation: Air carrier
- Aircraft: [N451UP](https://openairdocs.org/aircraft/N451UP), registered now
- Make and model: Boeing 757-24APF
- Registry model: [Boeing 757-24APF](https://openairdocs.org/model/boeing-757-24apf) (OpenAirDocs)
- Aircraft serial: 27739
- Aircraft time: 37,100 hours, 21,271 cycles
- System (JASC): [5310 · Fuselage Main, Structure](https://openairdocs.org/jasc/5310)
- Part: Frame
- Part number: 149N71304
- Part serial: NSN
- Condition: Corroded
- Location: Fs900 Rbl30
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA2022032180321

## Discrepancy

INSPECTION TYPE:CWING TO BODY STRUCTURE AT FS 900 FROM RBL 30 TO RBL 20 WL 133 THE 149N7130-4 FRAME ASSY WAS FOUND TO HAVE EXFOLIATION CORROSION ON UPPER "T" CHORD SURFACEREPAIRED FRAME ASSY SRM 51-70-12 FIGURE 1 SHEET 6

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