What was found
AFTER TAKE OFF, WENT TO SELECT GEAR UP. HANDLE WOULD NOT MOVE. WAS ABLE TO BRING HANDLE UP, BUT LOUD CRACKLING NOISE AND LANDING GEAR AIR / LAND FAIL MESSAGE. SELECTED GEAR DOWN, RECEIVED 3 GREEN, LOCKED & LANDED. FOUND THREE LOOSE FASTNERS ON TOP AFT SIDE OF PANEL 114AZ, SECURED FASTNERS IAW AMM 53-11-04. PERFORMED THREE LANDING GEAR EXTENSION AND RETRACTION OPERATIONAL TEST IAW AMM 32-30-00 OPS CHECKED GOOD , COULD NOT DUPLICATE FAULT. FOUND SYSTEM TO BE WORKING PROPERLY, ACFT RETURNED TO SERVICE.