# SDR ASAA2026040865644

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 8, 2026
- Submitted: April 23, 2026
- Operation: Air carrier
- Aircraft: [N528AS](https://openairdocs.org/aircraft/N528AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35695
- Aircraft time: 52,609 hours, 19,080 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Floor Support
- Part number: 146A750124
- Condition: Corroded
- Location: Zone 100
- 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/ASAA2026040865644

## Discrepancy

CORROSION ON THE STRINGER ON THE RIGHT HAND SIDE OF THE AFT CARGO PIT BETWEEN STATIONS 767 AND 787 12 INCHES FROM THE BUTT LINE. GROUNDED - YES. REMOVED CORROSION FROM THE AFT PIT FLOOR RAIL AT STA 772, RBL 13.84 IAW B737-800 SRM 53-00-53-1A-2.2.D ORIG THICKNESS IS .070" IAW B737-800 SRM 53-60-53-01-2 TABLE 2. REMOVED .011", REMAINING THICKNESS IS .059" AND IS FOUND TO BE OUT OF LIMITS IAW B737-800 SRM 53-00-53-1A-2.4.A.(2). REPAIRED AFT PIT FLOOR RAIL BETWEEN STA 767 AND STA 787, RBL 13.84 USING PN:BAC1509-100688 7050-T76511, PO:1124053.1 IAW B737-800 SRM 53-00-53-2R-3.

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