# SDR SWAA2021071524527

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 19, 2020
- Submitted: July 15, 2021
- Operation: Air carrier
- Aircraft: N7728D
- Make and model: Boeing 737-7BD
- Registry model: [Boeing 737-7BD](https://openairdocs.org/model/boeing-737-7bd) (OpenAirDocs)
- Aircraft serial: 33925
- Aircraft time: 46,167 hours, 23,625 cycles
- System (JASC): [5540 · Rudder Structure](https://openairdocs.org/jasc/5540)
- Part: Rudder
- Condition: Corroded
- Location: Tail
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2021071524527

## Discrepancy

RUDDER COUNTER BALANCE WEIGHT HAS EVIDENCE OF CORROSION AT MATING SURFACE. / REMOVED AND REPLACED RUDDER BALANCE WEIGHT PER REF CMM55-40-09 / SRM51-60-07

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.