What was found
UNSAFE GEAR WARNING DURING EXTENSION FOR ALL 4 GEAR ON PRIMARY AND SECONDARY INDICATORS. AIRSPEED AT APPROXIMATELY 190 KNOTS. RETRACTED AND FOLLOWED QRH. RECEIVED NORMAL GEAR DOWN INDICATION AFTER THAT. CREW DEBREIF, CREW SUSPECTS GEAR HANDLE WAS POSSIBLY NOT IN THE DOWN AND LOCK POSITION ON THE 1ST ATTEMPT. ALL 3 JACK PADS INSTALLED AND JACKS IN PLACE. JACKED ACFT AND SWUNG GEAR 4 TIMES WITH NO DEFECTS NOTED REF MM 07-11-00-2 AND 32-30-00-5. ACFT OK TO CONT SERVICE