As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT DID NOT RECEIVE NOSE DOWN AND LOCKED LIGHT ON APPROACH, ATTEMPTED EMERGENCY EXTENSION, NO CHANGE. FLEW BY TOWER AND VERIFIED THAT NOSE GEAR WAS NOT EXTENDED. LANDED AT MWC WITH MAIN GEAR EXTENDED AND NOSE RETRACTED. MECHANICS NOTED THAT NLG RETRACT CHAIN BETWEEN GEARBOX AND CROSSOVER WAS BROKEN CAUSING FAILURE OF GEAR TO EXTEND.