# SDR IPXA2026032038490

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 21, 2026
- Submitted: April 2, 2026
- Operation: Air carrier
- Aircraft: [N422UP](https://openairdocs.org/aircraft/N422UP), registered now
- Make and model: Boeing 757-24APF
- Registry model: [Boeing 757-24APF](https://openairdocs.org/model/boeing-757-24apf) (OpenAirDocs)
- Aircraft serial: 25324
- Aircraft time: 36,626 hours, 23,888 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Floor Support
- Part number: 146N544710
- Condition: Corroded
- Location: Zone
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA2026032038490

## Discrepancy

AFT CARGO COMP. FLOOR STRUCT. FLOOR STRINGER HAS EVIDENCE OF CORROSION AROUND MULTIPLE NUT PLATE HOLE BTW STA 1440 AND STA 1480 APPROX LBL/RBL 16.10, ID STICKER NUM. (085-002). REMOVED 2 EA NUTPLATES AND REMOVED CORROSION AT STA 1470 AFT CARGO COMP FLOOR STRUCTURE FLOOR STRINGER LBL 7.55, ORIGINAL MATERIAL THICKNESS OF .063", AT DEEPEST POINT BLEND WAS .052", EXCEEDED ALLOWABLE 10% LIMIT, MEASURED WITH DEPTH GAUGE #21-987 CAL DUE DATE 29-JULY-2026, IAW SRM 53-00-53-1A-A AND BOEING 757-200PF SRM 53-60-53-0I-1 AND BOEING 757-200PF SRM 51-40-02-0G-0. INSTALLED 01 EA FABRICATED FLOOR STRUCTURE STRINGER P/N 146N5447U13 BATCH 0004468226 IAW SRM 51-40-02-0G-0 AND DWG 146N5447.

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