# SDR DHL2001727012

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 28, 2001
- Submitted: May 4, 2001
- Operation: Air carrier
- Aircraft: [N727DH](https://openairdocs.org/aircraft/N727DH), registered now
- Make and model: Boeing 727228
- Aircraft serial: 20204
- System (JASC): [2215 · Autopilot Main Servo](https://openairdocs.org/jasc/2215)
- Part: Servo
- Condition: Weak
- Location: Autopilot Sys
- Stage of operation: CR
- How discovered: O
- Nature of condition: F
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DHL2001727012

## Discrepancy

IN ALL MODES (TURN KNOB & HEADING SELECT) AIRCRAFT ROLL JERKY. AUTOPILOT WILL NOT TRACK COURSE ON GPS. DISENGAGED NAV/LOC ON AUTOPILOT, AIRCRAFT ROLLED LEFT WITH JERKY MOTION INTO 30DEG. LEFT BANK. THEN TURN KNOB WOULD NOT BANK RIGHT UNTIL AUTOPILOT WAS DISENGAGED/REENGAGED (THIS WAS IN BOTH A&B MODES). DEFERRED AUTOPILOT SYSTEM PER MEL 22-1  PLACARD INSTALLED. T/S SYS, FOUND A/P AILERON SERVO TO BE WEAK AND JERKY.  REMOVED AND REPLACED AILERON SERVO AND OPS CHECKED IAW B727 MM 22-11-11.

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