A CRJ200 main landing gear uplocks failed to release the gear when the handle was place in the exten...

Attributes
ACN	859748
Time
Date	200911
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	Regional Jet 200 ER/LR (CRJ200)
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Flight Plan	VFR
Component
Aircraft Component	Gear Extend/Retract Mechanism
Person 1
Function	Captain Pilot Not Flying
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

On approach the landing gear handle was selected down. We received a red gear disagree warning with the nose gear (green) down and main landing gear (white) stuck in the up position. We did a go around and declared an emergency with ATC. The quick reference handbook (QRH) procedures were performed. The landing gear finally came down with the manual gear extension pulled. We landed on runway 11 with emergency equipment waiting in case of gear collapse. There were no further events. The mechanical landing gear uplocks did not release on command.

Original NASA ASRS Text

Title: A CRJ200 main landing gear uplocks failed to release the gear when the handle was place in the extend position. An emergency was declared; a go around executed and the landing gear lowered using the a Manual Gear Extension QRH checklist.

Narrative: On approach the landing gear handle was selected down. We received a red GEAR DISAGREE warning with the nose gear (GREEN) down and main landing gear (WHITE) stuck in the up position. We did a go around and declared an emergency with ATC. The Quick Reference Handbook (QRH) procedures were performed. The landing gear finally came down with the Manual Gear Extension pulled. We landed on Runway 11 with emergency equipment waiting in case of gear collapse. There were no further events. The mechanical landing gear uplocks did not release on command.

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.

A CRJ200 main landing gear uplocks failed to release the gear when the handle was place in the extend position. An emergency was declared; a go around executed and the landing gear lowered using the a manual gear extension QRH checklist.