# SDR SWAA2021071523985

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 22, 2020
- Submitted: July 15, 2021
- Operation: Air carrier
- Aircraft: N7725A
- Make and model: Boeing 737-76N
- Registry model: [Boeing 737-76N](https://openairdocs.org/model/boeing-737-76n) (OpenAirDocs)
- Aircraft serial: 32671
- Aircraft time: 45,756 hours, 22,465 cycles
- System (JASC): [5540 · Rudder Structure](https://openairdocs.org/jasc/5540)
- Part: Stiffener
- Part number: 175A140520
- 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/SWAA2021071523985

## Discrepancy

VERTICAL FIN RUDDER BALANCE WEIGHT BAY; LOWER WEB STIFFENER HAS CORROSION AT LBL 6 AND RBL 6; AND SEVERAL RIVET BUCKTAILS HAVE CORROSION. / REMOVED RUDDER BALANCE WEIGHT WRAP AROUND SEAL PANEL AND PANEL 324JL; REMOVED AND REPLACED STIFFENER (MPN# 175A1405-20)PER SRM 51-40-02; REINSTALLED PANEL 324JL PER AMM 55-33-31 AND REINSTALLED WRAP AROUND SEAL PANEL AER AMM 27-21-11. SEE WIPS AND SUBTASKS FOR INDIVIDUAL SIGNOFFS

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