What was found
WHEN THE LANDING GEAR WAS SELECTED UP AFTER TAKEOFF, THE GEAR DID NOT TRANSIT TO THE UP POSITION. ALL 3 REMAINED IN THE DOWN POSITION. WITH THE HANDLE SELECTED TO THE UP POSITION, ALL 3 GEAR INDICATIONS WERE RED-HANDLE AMBER. DURING EMERGENCY CHECK LIST GEAR WAS SELECTED TO THE DOWN POSITION. ALL 3 GEAR INDICATIONS TURNED GREEN. RETURNED TO THE FIELD AND ACCOMPLISHED A UNEVENTFUL LANDING. INTERIGATED PSEU AND FOUND FAULT CODES IN HISTORY DIN01A & DIN02A. FERRIED ACFT FOR REPAIRS. REPLACED LANDING GEAR CONTROL PANEL IAW 32-31-01-000-801,32-31-01-400-801 CKS GOOD. ALSO REMOVED AND REPLACED LANDING GEAR SELECTOR VALVE (PRECAUTION). FUNCTIONAL TEST OF THE LANDING GEAR PRIMARY EXTENSION AND RETRACTION SYS PERF