# SDR SWAA2025120139743

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 26, 2025
- Submitted: December 1, 2025
- Operation: Air carrier
- Aircraft: [N7857B](https://openairdocs.org/aircraft/N7857B), registered now
- Make and model: Boeing 737-79P
- Registry model: [Boeing 737-79P](https://openairdocs.org/model/boeing-737-79p) (OpenAirDocs)
- Aircraft serial: 29358
- Aircraft time: 61,520 hours, 41,051 cycles
- System (JASC): [2720 · Rudder Control System](https://openairdocs.org/jasc/2720)
- Part: Counterweight
- Condition: Corroded
- Location: Zone 300 Rudder
- 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/SWAA2025120139743

## Discrepancy

THE RUDDER COUNTER BALANCE WEIGHT CORRODED AND MISSING PAINT.   REPLACED THE RUDDER COUNTER BALANCE WEIGHT IAW CMM 55-40-09.

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