First test flight on King Air (RF11) No CO2 or CO instruments on flight. Purge flows set manually. PC clock 4 sec slow w.r.t GMT Pitch maneuvers at 16:50:30-16:59 and 13.5 kft Yaw maneuvers at 17:00:25-17:02:10 Speed runs @ 17:07:30-17:16:45 King Air display was 1 min. 35 sec. off. Dip into Hayden. Post-flight found SPout connector on Cylinder Box loose.