<< >> NASA ASRS Report 537618, February 2002

A canadair CL65 on approach at 4000 ft extended landing gear and only nose gear extended and locked with mains indicating up and locked.

Attributes
ACN	537618
Time
Date	200202
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : dfw.airport
State Reference	TX
Altitude	msl single value : 4000
Environment
Flight Conditions	IMC
Weather Elements	Ice
Light	Daylight
Aircraft 1
Controlling Facilities	tower : dfw.tower tower : ord.tower
Operator	common carrier : air carrier
Make Model Name	Regional Jet CL65, Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : atp pilot : commercial pilot : instrument
Experience	flight time last 90 days : 40 flight time total : 3900 flight time type : 40
ASRS Report	537618
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : position indication lights other flight crewa other flight crewb
Resolutory Action	flight crew : overcame equipment problem flight crew : declared emergency
Consequence	other
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance
Primary Problem	Aircraft

Narrative:

On final approach, put the landing gear down and nose gear came down and locked, but both main gear remained up. Put landing gear handle up and all landing gear came up. Put landing gear handle down and the nose gear came down and locked, but both mains stayed up and locked. Checked hydraulic pressure and was ok. Performed manual gear extension checklist and all 3 gear came down and locked. Landed with no other problems. Had emergency equipment standing by for precaution. Callback conversation with reporter revealed the following information: the reporter stated the maintenance crew replaced the landing gear logic box and returned the airplane to service. The reporter said the landing gear was extended manually.

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Original NASA ASRS Text

Title: A CANADAIR CL65 ON APCH AT 4000 FT EXTENDED LNDG GEAR AND ONLY NOSE GEAR EXTENDED AND LOCKED WITH MAINS INDICATING UP AND LOCKED.

Narrative: ON FINAL APCH, PUT THE LNDG GEAR DOWN AND NOSE GEAR CAME DOWN AND LOCKED, BUT BOTH MAIN GEAR REMAINED UP. PUT LNDG GEAR HANDLE UP AND ALL LNDG GEAR CAME UP. PUT LNDG GEAR HANDLE DOWN AND THE NOSE GEAR CAME DOWN AND LOCKED, BUT BOTH MAINS STAYED UP AND LOCKED. CHKED HYD PRESSURE AND WAS OK. PERFORMED MANUAL GEAR EXTENSION CHKLIST AND ALL 3 GEAR CAME DOWN AND LOCKED. LANDED WITH NO OTHER PROBS. HAD EMER EQUIP STANDING BY FOR PRECAUTION. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE MAINT CREW REPLACED THE LNDG GEAR LOGIC BOX AND RETURNED THE AIRPLANE TO SVC. THE RPTR SAID THE LNDG GEAR WAS EXTENDED MANUALLY.

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.