# SDR AUS20011277

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 2, 2001
- Submitted: January 4, 2002
- Operation: Air carrier
- Make and model: Boeing 737-33A
- Registry model: [Boeing 737-33A](https://openairdocs.org/model/boeing-737-33a) (OpenAirDocs)
- Engine: Cfmint CFM563B1US
- System (JASC): [2720 · Rudder Control System](https://openairdocs.org/jasc/2720)
- Part: Controller
- Condition: Contaminated
- Location: Rudder Control
- Stage of operation: DE
- How discovered: O
- Nature of condition: W, F, J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AUS20011277

## Discrepancy

(AUS) RUDDER CONTROL SYSTEM SUBJECT TO TWO UNCOMMANDED INPUTS.  INVESTIGATION FOUND EVIDENCE OF WATER/COFFEE CONTAMINATION OF THE FORWARD E&E BAY.  CONTAMINATION WAS DUE TO REMOVAL OF THE AIRSTAIRS AND DRIP TRAY LOCATED ABOVE THE E&E BAY. SERVICE BULLETIN SB 737-25-1317 THEN CALLS FOR THE INSTALLATION OF A  WATERSHIELD AND MOISTURE SHROUDS. THE SB WAS NEVER CARRIED OUT. PERSONNEL/MAINTENANCE ERROR.

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