What was found
(CAN) AIRCRAFT WAS AT CRUISE FLIGHT (28,000 FT) & AUTOPILOT BEGAN TO CLIMB. AUTOPILOT WAS DISENGAGED AND AIRCRAFT LEVELED OFF. NR 1 ALTIMETER AND AIRSPEED BEGAN TO RAPIDLY MOVE TO ZERO. CREW DESCENDED AND LANDED AT NEXT AVAILABLE AIRPORT AS NR 2 SYSTEM FUNCTIONED NORMALLY. AIRCRAFT WAS FLOWN VFR BACK TO MAINTENANCE BASE WHERE NR 1 STATIC LINE WAS FOUND PULLED OUT OF TEE FITTING IN CABIN SIDEWALL. LINE WAS TOO SHORT AND HAD BEEN FORCED INTO PLACE. LINE REPLACED AND REINSTALLED AND TESTED.