A CRJ700 nose gear does not retract normally on departure from ZZZ. Return for overweight landing ac...

Attributes
ACN	638252
Time
Date	200411
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	msl single value : 1100
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : zzz.tracon
Operator	common carrier : air carrier
Make Model Name	Regional Jet 700 ER&LR
Operating Under FAR Part	Part 121
Flight Phase	climbout : initial
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Experience	flight time last 90 days : 90 flight time total : 4000 flight time type : 5000
ASRS Report	638252
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 warning other flight crewa other flight crewb
Resolutory Action	flight crew : declared emergency flight crew : diverted to another airport other
Consequence	other
Factors
Maintenance	performance deficiency : fault isolation
Supplementary
Problem Areas	Maintenance Human Performance Aircraft
Primary Problem	Aircraft

Narrative:

Upon raising the gear handle, we received a triple chime and 'gear disagree' warning message. The nose gear failed to retract. We asked ATC for vectors and ran the QRH checklist. We declared the emergency and returned to ZZZ and performed an overweight landing at 71000 pounds. Passenger were notified of the situation and were xferred to another aircraft. Callback conversation with reporter revealed the following information: this incident was one of several similar ones listed as previous occurrences in the aircraft logbook. The resolution to this one was accomplished by replacement of a gear position sensor by maintenance. The aircraft has been flown several times since by the reporter with no problems noted. The reporter has no knowledge of similar incidents on other aircraft in the carrier's fleet.

Original NASA ASRS Text

Title: A CRJ700 NOSE GEAR DOES NOT RETRACT NORMALLY ON DEP FROM ZZZ. RETURN FOR OVERWT LNDG ACCOMPLISHED.

Narrative: UPON RAISING THE GEAR HANDLE, WE RECEIVED A TRIPLE CHIME AND 'GEAR DISAGREE' WARNING MESSAGE. THE NOSE GEAR FAILED TO RETRACT. WE ASKED ATC FOR VECTORS AND RAN THE QRH CHKLIST. WE DECLARED THE EMER AND RETURNED TO ZZZ AND PERFORMED AN OVERWT LNDG AT 71000 LBS. PAX WERE NOTIFIED OF THE SIT AND WERE XFERRED TO ANOTHER ACFT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THIS INCIDENT WAS ONE OF SEVERAL SIMILAR ONES LISTED AS PREVIOUS OCCURRENCES IN THE ACFT LOGBOOK. THE RESOLUTION TO THIS ONE WAS ACCOMPLISHED BY REPLACEMENT OF A GEAR POS SENSOR BY MAINT. THE ACFT HAS BEEN FLOWN SEVERAL TIMES SINCE BY THE RPTR WITH NO PROBS NOTED. THE RPTR HAS NO KNOWLEDGE OF SIMILAR INCIDENTS ON OTHER ACFT IN THE CARRIER'S FLEET.

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.

A CRJ700 nose gear does not retract normally on departure from ZZZ. Return for overweight landing accomplished.