# SDR 97ZZZX1474

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 27, 1997
- Submitted: March 26, 2000
- Operation: General aviation
- Filed by: [Parker Hannifin Corporation, repair station AU4R063M](https://openairdocs.org/faa-repair-station/AU4R063M/parker-hannifin-corporation.md) (OpenAirDocs)
- Make and model: Boeing 737-3G7
- Registry model: [Boeing 737-3G7](https://openairdocs.org/model/boeing-737-3g7) (OpenAirDocs)
- System (JASC): [2722 · Rudder Actuator](https://openairdocs.org/jasc/2722)
- Part: Servo Valve
- Part number: 680105005
- Condition: Fail Test
- Location: Rudder Pcu
- Part time: 20,624 hours
- Component: 65C370529
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/97ZZZX1474

## Discrepancy

BRAZILIAN AIR LINES SENT RUDDER PCU TO REPAIR STATION AU4R FOR EVALUATION FOLLOWING FAILURE ON PRE-FLIGHT TEST PER BAC SB 7371202.  FOUND UNIT FAIL TEST 12C SECONDARY STROKE/FLOW OF BAC CMM 27-20-01 AND CAUSE WAS IMPROPER ASSY OF SERVO CONTROL VALVE AD 94-01-07 AND 95-06-53 APPLICABLE.

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