A canadair CL65 on takeoff at 500 ft AGL declared an emergency and diverted due to nose gear unsafe ...

Attributes
ACN	521295
Time
Date	200108
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : tys.airport
State Reference	TN
Altitude	agl single value : 500
Environment
Flight Conditions	Marginal
Light	Dawn
Aircraft 1
Controlling Facilities	tracon : tys.tracon
Operator	common carrier : air carrier
Make Model Name	Regional Jet CL65, Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : takeoff
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
Experience	flight time last 90 days : 90 flight time total : 3500 flight time type : 550
ASRS Report	521295
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : nose gear unsafe light other flight crewa other flight crewb
Resolutory Action	flight crew : declared emergency flight crew : diverted to another airport
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

Departing from knoxville at XA36 on aug/fri/01, after takeoff and positive rate of climb requested captain to select 'gear up.' captain selected landing gear handle to the up position. Shortly after received a gear disagree aural and message. Gear indications showed that both main landing gear were up and locked but that the nose gear had failed to retract and disagreed with the landing gear handle position. Crew performed malfunction checklist and landing gear was selected down. All landing gear indicated down and locked. Captain briefed crew, crash, fire and reserve was notified. Landing back at knoxville was uneventful. Aircraft was taxied back to gate without incident and deboarded. Maintenance personnel inspected aircraft and no cause for malfunction was determined at the time of this report. Callback conversation with reporter revealed the following information: the reporter stated when on the ground the technicians made some checks but were unable to make a quick fix and the airplane was taken OTS. The reporter said maintenance has not advised the crew of the failed component or the maintenance action taken.

Original NASA ASRS Text

Title: A CANADAIR CL65 ON TKOF AT 500 FT AGL DECLARED AN EMER AND DIVERTED DUE TO NOSE GEAR UNSAFE LIGHT WITH HANDLE IN THE RETRACT POS.

Narrative: DEPARTING FROM KNOXVILLE AT XA36 ON AUG/FRI/01, AFTER TKOF AND POSITIVE RATE OF CLB REQUESTED CAPT TO SELECT 'GEAR UP.' CAPT SELECTED LNDG GEAR HANDLE TO THE UP POS. SHORTLY AFTER RECEIVED A GEAR DISAGREE AURAL AND MESSAGE. GEAR INDICATIONS SHOWED THAT BOTH MAIN LNDG GEAR WERE UP AND LOCKED BUT THAT THE NOSE GEAR HAD FAILED TO RETRACT AND DISAGREED WITH THE LNDG GEAR HANDLE POS. CREW PERFORMED MALFUNCTION CHKLIST AND LNDG GEAR WAS SELECTED DOWN. ALL LNDG GEAR INDICATED DOWN AND LOCKED. CAPT BRIEFED CREW, CRASH, FIRE AND RESERVE WAS NOTIFIED. LNDG BACK AT KNOXVILLE WAS UNEVENTFUL. ACFT WAS TAXIED BACK TO GATE WITHOUT INCIDENT AND DEBOARDED. MAINT PERSONNEL INSPECTED ACFT AND NO CAUSE FOR MALFUNCTION WAS DETERMINED AT THE TIME OF THIS RPT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED WHEN ON THE GND THE TECHNICIANS MADE SOME CHKS BUT WERE UNABLE TO MAKE A QUICK FIX AND THE AIRPLANE WAS TAKEN OTS. THE RPTR SAID MAINT HAS NOT ADVISED THE CREW OF THE FAILED COMPONENT OR THE MAINT ACTION TAKEN.

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 canadair CL65 on takeoff at 500 ft AGL declared an emergency and diverted due to nose gear unsafe light with handle in the retract position.