Service difficulty report · Unknown · Boeing 737990ER

Difficulty date
July 10, 2023
Submitted
July 12, 2023
Operation
Air carrier
Aircraft
N494AS
Make and model
Boeing 737990ER
Aircraft serial
41729
Aircraft time
27,240 hours, 8,320 cycles
Part
Unknown
Part number
UNKNOWN
Condition
Unknown
Location
Unknown
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

VS SELECTOR WHEN YOU SCROLL IT GOES OPPOSITE DIRECTION EXAMPLE START UP -500FPM, YOU WENT -1000FPM AND SCROL DOWN IT WILL GO TO -250FPM. GROUNDED - YES. DFCS BITE PERFORMED PER FIM 22-11 TASK801. NO CURRENT FAULTS AND NO FAULT HISTORY PERFORMED GOOD BITE LIBRARY TEST INTERACTIVE TEST. LIBRARY TESTNO 60.56 MCP VERTICAL SPEED KNOB.REF AMM 22-11-00-740-806.