What was found
FLT 3900 - PRE-SELECTED ALTITUDE CHANGES SPONTANEOUSLY AFTER BEING SET CAUSING THE AUTOPILOT TO OVERSHOOT ASSIGNED ALTITUDES. FCC DIAGNOSTICS HAD NO FAULTS LOGGED. ALTITUDE SELECT FUNCTIONS NORMALLY. NO DISCREPANCY NOTED.
- Difficulty date
- July 10, 2007
- Submitted
- July 18, 2007
- Operation
- Air carrier
- Aircraft
- N447SW
- Make and model
- Cndair CL6002B19
- Aircraft serial
- 7677
- Aircraft time
- 13,445 hours, 10,344 cycles
- System (JASC)
- 2210 · Autopilot System
- Part
- Autopilot Sys
- Condition
- Malfunctioned
- Stage of operation
- NR
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.