What was found
PITCH TRIM JAM DURING TAKE-OFF. PRIMARY PITCH TRIM WOULD NOT ACTUATE NOSE DOWN WHILE BEING PRESSED CONSTANTLY FOR AT LEAST 5-6 SECONDS AFTER TAKE-OFF. A LOUD CLUNK/THUD NOISE WAS HEARD. SECONDARY TRIM WAS SELECTED AND USED TO REGAIN PITCH CONTROL. AN IMMEDIATE EMERGENCY RETURN WAS CONDUCTED. CORRECTIVE ACTION: TROUBLESHOT DOWN TO BAD ACU AND BAD PRIMARY STAB TRIM ACTUATOR. REMOVED ACU AND INSTALLED NEW Ã?CU. WORK DONE IAW AMM 27-40-20. AWAITING ARRIVAL OF NEW ACTUATOR. (CB,CT12/31/2025). RECEIVED MULTIPLE ACTUATORS BAD FROM STOCK AWAITING NEW ACTUATOR ARRIVAL ON 1/3/2026. REMOVED BAD ACTUATOR AND INSTALLED OVERHAULED ACTUATOR POST MX CHECKS GOOD. WORK DONE IAW AMM 27-40-05.