CRJ200 crew had an EICAS message 'nose door open and gear down disagreement.' declared emergency and made low approach for gear check, then landed without further incident.

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Attributes
ACN	637346
Time
Date	200411
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	msl single value : 2600
Environment
Flight Conditions	Marginal
Weather Elements	Fog
Aircraft 1
Controlling Facilities	tower : zzz.tower
Operator	common carrier : air carrier
Make Model Name	Regional Jet 200 ER&LR
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Experience	flight time last 90 days : 160 flight time total : 5800 flight time type : 3000
ASRS Report	637346
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : eicas nose door open, gear down disagree other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance flight crew : executed missed approach flight crew : declared emergency
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

At 185 KTS on approach to ZZZ, we put the gear down and got the warning messages 'nose door open and gear down disagreement.' did missed approach and went to the holding pattern to do the QRH. The QRH led us to manually extend the landing gear. Tried to reach company via comrdo, but we were too low (5000 ft). Unable to reach ZZZ operations to let them know. Declared an emergency. Did a low approach to get tower to verify the gear was down. They confirmed it was. Landed and taxied to the gate without further incident.

Original NASA ASRS Text

Title: CRJ200 CREW HAD AN EICAS MESSAGE 'NOSE DOOR OPEN AND GEAR DOWN DISAGREEMENT.' DECLARED EMER AND MADE LOW APCH FOR GEAR CHK, THEN LANDED WITHOUT FURTHER INCIDENT.

Narrative: AT 185 KTS ON APCH TO ZZZ, WE PUT THE GEAR DOWN AND GOT THE WARNING MESSAGES 'NOSE DOOR OPEN AND GEAR DOWN DISAGREEMENT.' DID MISSED APCH AND WENT TO THE HOLDING PATTERN TO DO THE QRH. THE QRH LED US TO MANUALLY EXTEND THE LNDG GEAR. TRIED TO REACH COMPANY VIA COMRDO, BUT WE WERE TOO LOW (5000 FT). UNABLE TO REACH ZZZ OPS TO LET THEM KNOW. DECLARED AN EMER. DID A LOW APCH TO GET TWR TO VERIFY THE GEAR WAS DOWN. THEY CONFIRMED IT WAS. LANDED AND TAXIED TO THE GATE WITHOUT FURTHER INCIDENT.

Data retrieved from NASA's ASRS site as of July 2007 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.