Service difficulty report · Control Panel · Boeing 737990ER

Difficulty date
June 8, 2017
Submitted
June 15, 2017
Operation
Air carrier
Aircraft
N407AS
Make and model
Boeing 737990ER
Aircraft serial
41731
Aircraft time
18,019 hours, 5,814 cycles
Part
Control Panel
Part number
8221567102
Part serial
17YXYK
Condition
Failed
Location
Vertical Speed
Part time
23,876 hours, 8,662 cycles
Stage of operation
NR
How discovered
O
Nature of condition
O
Precautionary procedure
O

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

What was found

MCP VERTICAL SPEED WINDOW HAS ONE DIGIT SEGMENT PERMANENTLY ILLUMINATED. ACFT GROUNDED. REMOVED & REPLACED THE MCP IAW AMM 22-11-34-000-801, & 22-11-34-400-801. OPS CHECKED NORMAL IAW AMM 22-11-34-740-801. MCP TESTS NORMAL, BITE GROUP 32. LAND VERIFY NORMAL. BITE GROUP 49.