What was found
AFTER TAKEOFF, CABIN PRESSURE FLUCTUATED PLUS OR MINUS 1,500 FT SELECTED MANUAL CONTROL AND RETURNED TO MSP. FLIGHT LANDED WITHOUT INCIDENT. REPLACED AMPLIFIER AND PRESSURE CONTROL, OPERATIONAL CHECK OK.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AFTER TAKEOFF, CABIN PRESSURE FLUCTUATED PLUS OR MINUS 1,500 FT SELECTED MANUAL CONTROL AND RETURNED TO MSP. FLIGHT LANDED WITHOUT INCIDENT. REPLACED AMPLIFIER AND PRESSURE CONTROL, OPERATIONAL CHECK OK.