As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON AIRCRAFT POWER UP CREW NOTED ALTITUDE COMPENSATOR ANNUNCIATOR WAS ILLUMINATED. CREW POWERED DOWN AIRCRAFT AND CONTACTED MAINTENANCE. BOMBARDIER COMPLETED ALL ALTITUDE COMPENSATOR TESTS AND STALL PROTECTION SYSTEM CHECKS PER A/M/M. COULD NOT DUPLICATE DISCREPANCY. SUSPECT POSSIBLE MOISTURE IN STATIC LINE THAT EVAPORATED OVERNIGHT.