SDR ASAA2015032511117

Service difficulty report · Control Panel · Boeing 737990ER

Difficulty date: March 25, 2015
Submitted: March 27, 2015
Operation: Air carrier
Aircraft: N402AS
Make and model: Boeing 737990ER
Aircraft serial: 41189
Aircraft time: 9,252 hours, 2,982 cycles
System (JASC): 2210 · Autopilot System
Part: Control Panel
Condition: Malfunctioned
Location: Cockpit
Stage of operation: TX
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 DIGITS DO NOT DISPLAY, EVEN WITH "LIGHTS TEST" SELECTED. ACFT GROUNDED. CYCLED CB'S FOR MCP, P18-1, D5, MCP, DC1 AND P6-2, C3, MCP DC2 AND DIGITS DISPLAYED. PERFORMED MCP INSTALLATION TEST IAW MM 22-11-34. ALL TESTS PASSED. NO HISTORY 30 DAYS. GROUND VERIFICATION SUCCESSFUL.