What was found
AUTOPILOT PORPOISING IN VERTICAL SPEED AND PITCH DUMP MODES (ROUGH PORPOISING). PROBLEM DUPLICATED, REPLACED A/P ELEVATOR SERVO IAW DC-8 M/M 22-12-02 AND A/P PITCH CHANNEL COMPUTER IAW DC-8 M/M 22-10-39, SYS OPS CHECK GOOD.
- Difficulty date
- February 12, 2001
- Submitted
- February 16, 2001
- Operation
- Air carrier
- Aircraft
- N8177U
- Make and model
- Doug DC871F
- Aircraft serial
- 45983
- Aircraft time
- 68,221 hours, 42,884 cycles
- System (JASC)
- 2215 · Autopilot Main Servo
- Part
- Servo
- Part number
- 61574317
- Part serial
- 2092D3
- Condition
- Malfunctioned
- Location
- Autopilot Sys
- Stage of operation
- CR
- How discovered
- O
- Nature of condition
- F
- Precautionary procedure
- A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.