As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF DURING GEAR RETRACTION GEAR UNLOCK LIGHT STAYED ON. TROUBLESHOT AND FOUND NOSE STRUT NOT FULLY EXTENDING WITH WEIGHT OFF WHEELS. REMOVED STRUT AND REPACKED. REINSTALLED AND SERVICED IAW CESSNA 560XL CMM CHAPTER 32-20-01, PERFORMED GEAR SWING. OPS CHECK GOOD.