Narrative:

No down indication on left main gear while on visual approach. Remained visual and circled; ran checklist; blew gear; still no indication but gear unlock light remained extinguished the whole time; rotary test suggested left main light inop and no gear warning horn was heard when throttle retarded. Called company; spoke with maintenance and dispatch. They suggested not attempting landing at our destination if they did not have fire and rescue. We agreed; they did not so we diverted. Enroute to to our divert airport we received the hydraulic low flow left and right lights. Ran the checklist. Flaps still worked when selected to 35 and gear remained down the whole time. Declared emergency with tower and they called out fire and rescue. Landed uneventfully; pulled off runway and shut aircraft down on taxi way. Had FBO tug the aircraft rest of the way.

Related reports:

Google
 

Original NASA ASRS Text

Title: After extending landing gear; CE560 crew did not receive a down indication on left main gear. Indications are that the light has failed; however the crew elected to divert to nearby airport with CFR and landed safely.

Narrative: No down indication on left main gear while on visual approach. Remained visual and circled; ran checklist; blew gear; still no indication but gear unlock light remained extinguished the whole time; rotary test suggested left main light inop and no gear warning horn was heard when throttle retarded. Called company; spoke with Maintenance and Dispatch. They suggested not attempting landing at our destination if they did not have fire and rescue. We agreed; they did not so we diverted. Enroute to to our divert airport we received the HYD LOW FLOW L and R lights. Ran the checklist. Flaps still worked when selected to 35 and gear remained down the whole time. Declared emergency with tower and they called out fire and rescue. Landed uneventfully; pulled off runway and shut aircraft down on taxi way. Had FBO tug the aircraft rest of the way.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.