# SDR HALA9737

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 10, 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: Bearing
- Condition: Worn
- Location: Rudder
- Stage of operation: CR
- Nature of condition: E
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HALA9737

## Discrepancy

HNL - FLT 524 - FROM LOG PAGE 124685:  AT AIRSPEEDS GREATER THAN 300 KIAS, THE ACFT HAS A RUMBLE AND WOBBLE THAT IS MORE PRONOUNCED AT WEIGHTS LESS THAN 95,000 POUNDS.  RUMBLE/WOBBLE OCCURS WITH OR WITHOUT AUTOPILOT ON.  RUDDER SERVO WITH YAW DAMPER ON SHOWS A BACKGROUND FLUCTUATION THAT DISAPPEARS WITH YAW DAMPER OFF.  INSPECTED ALL FLIGHT CONTROLS AND SURFACES OF A/C.  FOUND RUDDER CONTROL TAB ROD END BEARINGS WORN.  REPLACED BOTH END ASSYS.  OPS AND RIG CHECK OK PER 27-20-2, DC-9 MM.  (X)

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