What was found
DURING APPROACH, LT MLG, WHEN SELECTED DOWN, DID NOT SHOW DOWN AND SAFE INDICATION ON EITHER, NORMAL OR AUXILIARY, INDICATION SYSTEM. RT AND NLG BOTH SHOWED DOWN AND LOCKED. PILOT ATTEMPTED EMERGENCY EXTENSION UTILIZING AUXILIARY HYDRAULIC SYSTEM, IAW EMERGENCY CHECKLIST, WITH NO SUCCESS. PILOT DECLARED EMERGENCY AND LANDED. AT TOUCHDOWN, LT MLG DOWN AND LOCKED INDICATED ON BOTH INDICATION SYSTEMS. ON GROUND, JACKED ACFT AND TROUBLESHOT SYSTEM. RAN GEAR UP AND DOWN AND FOUND THAT THE LT LANDING GEAR TOOK EXTENDED AMOUNT OF TIME TO LOCK DOWN. VERIFIED NO BINDING IN SYSTEM. R & R MLG JACK ACTUATOR WITH O/H UNIT, BLED SYSTEM AND PERFORMED 15 FAULT FREE LANDING GEAR RETRACTIONS/EXTENSIONS.