What was found
(CAN) OVERHAULED GEAR DOOR ACTUATOR INSTALLED TO RECTIFY A PREVIOUS PROBLEM. GROUND TEST OK. TEST FLIGHT FORWARD GEAR DOORS FAILED TO OPEN AND GEAR MANUALLYLOWERED. GROUND OPERATION NORMAL. INVESTIGATION REVEALED THAT THE ACTUATOR LIMIT SWITCH WIRES WERE MISLABELED DURING OVERHAUL. THE AUX LIMIT SWITCHES ARE BACK-UPS TO THE AIRFRAME MOUNTED LIMIT SWITCHES. DURING FLIGHT THE AIR LOADES ON THE DOORS, THE ACTUATOR TRIPPED THE AUX LIMIT SWITCHES AS WELL AS THE AIRFRAME SWITCHES. SWITCH WIRES RELABELED AND INSTALLED CORRECTLY.