As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LANDING GEAR WAS LOWERED FOR LANDING AND HAD NO INDICATION OF EXTENSION EXCEPT BY SOUND. GEAR WAS CYCLED UP AND WE HEARD SOME RETRACTION. HANDLE WAS CYCLED DOWN AND NOTHING HAPPENED. GEAR WAS LOWERED MANUALLY. REMOVED LIGHT BULBS AND INSTALLED NEW BULBS. OPERATIONAL CHECKS GOOD. WORK PERFORMED IAW CH 33-10-00 OF THE MM.