Service difficulty report · Control Panel · Boeing 737990ER

Difficulty date
August 2, 2023
Submitted
August 3, 2023
Operation
Air carrier
Aircraft
N471AS
Make and model
Boeing 737990ER
Aircraft serial
41703
Aircraft time
33,155 hours, 10,348 cycles
Part
Control Panel
Part number
8221567102
Part serial
16D26F
Condition
Malfunctioned
Location
Flight Deck
Part time
56,987 hours, 18,636 cycles
Stage of operation
NR
How discovered
V
Nature of condition
O
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

MCP HEADING SELECTOR SWITCH KNOB STUCK ON HEADING 238. SWITCH KNOB ROTATE FREELY BUT HEADING DOES NOT CHANGE. GROUNDED - YES. CONFIRMED MCP LOCKED UP. OPENED-TAGGED 9 EACH C/B'S. REPLACED MCP. CLOSED AND REMOVED TAGS ON 9 EACH C/B'S. MCP AND LLM TESTS NORMAL REF MM 22-11-34. SEAMC JOEY CONSULTED.