What was found
(CAN) DEPARTED NORMALLY. CLIMB TO CRUISE ALTITUDE WAS UNEVENTFUL (FL270). AUTOPILOT ENGAGED & CLEARED DIRECT APPROX 20 NM NORTH, STAB CH 1 INOP WHILE STATUS MESSAGE ILLUMINATED. QRH PROCS REQUIRED ATTEMPTED RESET - UNSUCCESSFUL - QRH REQD NO FUTHER ACTION (STAB CH 2 IS REDUNDANT SYS). WE HOWEVER DID PULL & MARK QRH P. SHOULD CH 2 FAIL - WHICH OCCURRED LATER - NOTIFIED MAINT VIA ARINC & WROTE UP STAB CH 1 INOP IN LOGBOOK. APPROX 80MIN LATER STAB CH 2 INOP & MACH TRIM INOP MASTER CAUTION MESSAGES ILLUMINATED ON ED 1. COMPLIED WITH QRH PROCEEDURES