What was found
MCP ALT SELECTOR STUCK AT 24100 FT. GROUNDED - YES. VERIFIED MCP ALTITUDE SELECTOR LOCKED UP. REPLACED MCP. MCP TEST AND LLM TESTS NORMAL REF B737-900 AMM 22-11-34 AND BITE GRP #32 AND 49.
- Difficulty date
- December 15, 2019
- Submitted
- December 17, 2019
- Operation
- Air carrier
- Aircraft
- N419AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 41734
- Aircraft time
- 26,757 hours, 8,651 cycles
- System (JASC)
- 2210 · Autopilot System
- Part
- Selector
- Condition
- Stuck
- Location
- Control Panel
- Part time
- 31,522 hours, 10,897 cycles
- 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.