# SDR ASAA2026072367849

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 23, 2026
- Submitted: August 11, 2026
- Operation: Air carrier
- Aircraft: [N921AK](https://openairdocs.org/aircraft/N921AK), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 43337
- Aircraft time: 17,690 hours, 5,109 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Transition Panel
- Part number: 146A75025
- 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/ASAA2026072367849

## Discrepancy

AFT CARGO COMPT RIGHT SIDE TRANSITION PANEL UPPER AND LOWER SURFACE HAS CORROSION NUMEROUS PLACE BETWEEN BS727J+13 AND BS727+4.  GROUNDED - YES. BLENDED AWAY CORROSION ORIGINAL THICKNESS .040 MAT LOSS AT GREATEST .006 IN VARIOUS PLACES, NEW THICKNESS .034 AREAS OUT OF LIMITS. COMPLETED REPAIR PER B737-MAX9 SRM 53-00-53-2R-5, SRM 51-40-02, AND BWDG 146A7500 REV.-.

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