As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING APPROACH NOSE GEAR WOULD GO TO DOWN AND LOCK ON TWO TRIES. BLEW GEAR DOWN AND PROCEEDED TO LAND. JACKED AIRPLANE, CYCLED GEAR 15 TIMES TO BLEED SYSTEM RESET AND RE-SERVICED NITROGEN BOTTLE. COULD NOT DUPLICATE GEAR PROBLEM IN ANY OF THE OPERATIONS. ALL WORK DONE IAW CESSNA 560 M/M CHAPTER 32-30-00.