Narrative:

The captain extended the gear at about 5;000 ft and 240 KIAS with full spoilers extended and we received a gear disagree warning message. The nose gear was indicating down and locked and the main gear was indicating up. We informed the tower of the malfunction and our plans to go missed. On the missed approach; the tower confirmed only the nose gear was down. Departure provided vectors just off the shoreline while I ran the gear down disagree checklist.after cycling the gear three times; the gear indications did not change; therefore; we manually extended the gear and received three green down and locked indications. We declared an emergency and landed on the runway. The nose wheel steering functioned normally. Emergency vehicles were standing by as a precautionary measure.

Google
 

Original NASA ASRS Text

Title: When both main gear failed to extend normally the flight crew of a CRJ-200 utilized the manual extension procedure; got three green lights and landed safely.

Narrative: The Captain extended the gear at about 5;000 FT and 240 KIAS with full spoilers extended and we received a GEAR DISAGREE warning message. The nose gear was indicating down and locked and the main gear was indicating up. We informed the Tower of the malfunction and our plans to go missed. On the missed approach; the Tower confirmed only the nose gear was down. Departure provided vectors just off the shoreline while I ran the Gear Down Disagree checklist.After cycling the gear three times; the gear indications did not change; therefore; we manually extended the gear and received three green down and locked indications. We declared an emergency and landed on the runway. The nose wheel steering functioned normally. Emergency vehicles were standing by as a precautionary measure.

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.