Service difficulty report · Control Panel · Boeing 737890

Difficulty date
March 31, 2017
Submitted
April 4, 2017
Operation
Air carrier
Aircraft
N508AS
Make and model
Boeing 737890
Aircraft serial
35691
Aircraft time
33,207 hours, 9,996 cycles
Part
Control Panel
Condition
Malfunctioned
Location
Autopilot Sys
Stage of operation
CR
How discovered
O
Nature of condition
J
Precautionary procedure
O

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

What was found

AUTOPILOT A KICKED OFF TWICE IN SMOOTH AIR DURING CRUISE. BOTH TIMES IT RESET. ACFT GROUNDED. ADJUSTED THE ELEVATOR CONTROL CABLES EA & EB IAW AMM 27-31-00-820-801. CHECKED ADJUSTMENT OF PITCH FORCE TRANSDUCERS, WITHIN LIMITS IAW AMM 27-31-00-820-801 PARA G.2.(H). ACCOMPLISHED FIM 22-14/80. REPAIR CONFIRMATION PASSES WITH NO FAULTS. ACCOMPLISHED FIM 22-11/801. 6 A/P DISCONNECTS WERE RECORDED 3 A AND 3 B ALL ABOVE 35,000 FT. MODE CONTROL PANEL FAULTED ALL TIMES WITH MX MESSAGE 22-11607. REPLACED MODE CONTROL PANEL IAW AMM 22-11-34/401. LRU REPLACEMENT TEST FOR MCP IAW AMM 22-11-34/501. LAND VERIFY BITE IAW AMM 22-11-00/201 & HGS SENSOR TEST FOR FCC/AT IAW SMM 34-36-00. ALL TESTS PASS.