What was found
AIRCRAFT WILL NOT DESCEND IN AUTO-PILOT USING VERTICAL SPEED; REVERTS TO LEVEL CHANGE MODE. FOUND FCC B-SYSTEM AT FAULT. PLACED ON MEL 22-1. 03/20/2006: REPLACED FCC -B- AND PERFORMED SATISFACTORY OPS CHECK PER MM 22-11-331.
- Difficulty date
- March 17, 2006
- Submitted
- March 23, 2006
- Operation
- Air carrier
- Aircraft
- N251TR
- Make and model
- Boeing 737228
- Aircraft serial
- 23792
- Aircraft time
- 30,576 hours, 25,238 cycles
- System (JASC)
- 2211 · Autopilot Computer
- Part
- Computer
- Part number
- 4038891916
- Condition
- Malfunctioned
- Location
- Autopilot Sys
- Stage of operation
- DE
- How discovered
- O
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.