What was found
AIRCRAFT FAILED TO PRESSURIZED AFTER TAKE OFF. ALL THE CONTROLS WERE SET UP CORRECTLY. RETURNED TO DEPARTURE. REMOVED AND REPLACED THE DIGITAL CONTROLLER IAW AMM 21-31-01. PERFORMED AN OPS CHECK IAW AMM 21-31-00, CHECKED GOOD.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIRCRAFT FAILED TO PRESSURIZED AFTER TAKE OFF. ALL THE CONTROLS WERE SET UP CORRECTLY. RETURNED TO DEPARTURE. REMOVED AND REPLACED THE DIGITAL CONTROLLER IAW AMM 21-31-01. PERFORMED AN OPS CHECK IAW AMM 21-31-00, CHECKED GOOD.