What was found
ON DESCENT VERTICAL SPEED WAS NOT SELECTABLE WOULD DEFAULT TO CURRENT DESCENT RATE AND WAS NOT CONTROLLABLE. GROUNDED - YES. MCP FAILED V/S LIBRARY TEST. REMOVED AND REPLACED MCP REF B737-800 AMM 22-11-34. OPS CHECK GOOD.
- Difficulty date
- June 19, 2021
- Submitted
- June 30, 2021
- Operation
- Air carrier
- Aircraft
- N566AS
- Make and model
- Boeing 737890
- Aircraft serial
- 35182
- Aircraft time
- 53,433 hours, 15,786 cycles
- System (JASC)
- 2210 · Autopilot System
- Part
- Control Panel
- Condition
- No Test
- Location
- V/S Library
- 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.