<< >> NASA ASRS Report 215395, July 1992

During approach to landing at a high altitude airport the engine stopped when the pilot placed the mixture control in the full rich position.

Attributes
ACN	215395
Time
Date	199207
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : den
State Reference	CO
Altitude	agl bound lower : 1500 agl bound upper : 1500 msl bound lower : 6800 msl bound upper : 6800
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : den
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Retractable Gear
Flight Phase	descent : approach descent other
Flight Plan	VFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : atp pilot : instrument pilot : flight engineer pilot : commercial
Experience	flight time last 90 days : 30 flight time total : 17000 flight time type : 125
ASRS Report	215395
Person 2
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : overcame equipment problem
Consequence	Other Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

On descent into denver, engine mixture was placed to full rich. Engine began to run rough. Engine mixture was placed to lean position -- engine smoothed out. On downwind to runway 26 engine mixture again was placed to full rich -- this caused the engine to stop running. At this point in time I placed the fuel boost pump off and mixture to lean -- engine started. During all of this, approach control cleared me to land on runway 18R. After checking with local FBO operator, he educated me on high altitude airport operations of the model number engine -- problem solved.

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Original NASA ASRS Text

Title: DURING APCH TO LNDG AT A HIGH ALT ARPT THE ENG STOPPED WHEN THE PLT PLACED THE MIXTURE CTL IN THE FULL RICH POS.

Narrative: ON DSCNT INTO DENVER, ENG MIXTURE WAS PLACED TO FULL RICH. ENG BEGAN TO RUN ROUGH. ENG MIXTURE WAS PLACED TO LEAN POS -- ENG SMOOTHED OUT. ON DOWNWIND TO RWY 26 ENG MIXTURE AGAIN WAS PLACED TO FULL RICH -- THIS CAUSED THE ENG TO STOP RUNNING. AT THIS POINT IN TIME I PLACED THE FUEL BOOST PUMP OFF AND MIXTURE TO LEAN -- ENG STARTED. DURING ALL OF THIS, APCH CTL CLRED ME TO LAND ON RWY 18R. AFTER CHKING WITH LCL FBO OPERATOR, HE EDUCATED ME ON HIGH ALT ARPT OPS OF THE MODEL NUMBER ENG -- PROBLEM SOLVED.

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.