# SDR HALA97112

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 28, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N661HA
- Make and model: Doug DC-9-51
- Registry model: [Doug DC-9-51](https://openairdocs.org/model/mcdonnell-douglas-dc-9-51) (OpenAirDocs)
- Aircraft serial: 47796
- System (JASC): [2720 · Rudder Control System](https://openairdocs.org/jasc/2720)
- Part: Shutoff Valve
- Part number: 37723745503
- Condition: Failed
- Location: Rudder Hyd
- Stage of operation: CR
- Nature of condition: E, J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HALA97112

## Discrepancy

HNL - FLT 522 - FROM LOG PAGE 122617:  ACFT HAS NOTICEABLE WOBBLE ABOVE 290 KNOTS CL/DESCENT/CRUISE WITHOUT AP YAW DAMPER OR RUDDER POWER.  DUE TO NOTICEABLE AC WOBBLE ABOVE 290 KNOTS, CL/DESCENT/CRUISE REF LOG PAGE 122617 TEST FLIGHT REQUIRED.  REPLACED RUDDER HYD PRESS SHUT-OFF VALVE PER MM 27-20.  OP CHECK OK.  TEST FLIGHT ACCOMPLISHED.  CONTROLS NORMAL IN ALL CONFIGURATIONS AND AT ALL SPEEDS UP TO 330 KNOTS.  (X)

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