<< >> NASA ASRS Report 147095, May 1990

Pilot of twin engine aircraft experiences roughness in one engine, then in the second engine. Makes emergency landing in field.

Attributes
ACN	147095
Time
Date	199005
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : sgd
State Reference	CA
Altitude	msl bound lower : 3500 msl bound upper : 3500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 2 Eng, Retractable Gear
Flight Phase	cruise other
Route In Use	enroute airway : zoa
Flight Plan	None
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private pilot : instrument
Experience	flight time last 90 days : 20 flight time total : 1600
ASRS Report	147095
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : declared emergency other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

Cruise flight at 3500' en route sgd VOR experienced severe engine roughness in the right hand engine. While en route toward a suitable runway, left hand engine began similar operation. Maintained positive control of aircraft while performing normal troubleshooting procedure. Was unable to reestablish normal engine operation prior to reaching a safe altitude from which to make a normal landing. I elected to land in a nearby field which allowed me a safe approach and landing into the wind. No damage was incurred by aircraft or occupants. Subsequent investigation, still incomplete, seems to indicate fuel contamination and possibly underlying engine problem.

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Original NASA ASRS Text

Title: PLT OF TWIN ENGINE ACFT EXPERIENCES ROUGHNESS IN ONE ENGINE, THEN IN THE SECOND ENGINE. MAKES EMERGENCY LNDG IN FIELD.

Narrative: CRUISE FLT AT 3500' ENRTE SGD VOR EXPERIENCED SEVERE ENG ROUGHNESS IN THE R HAND ENG. WHILE ENRTE TOWARD A SUITABLE RWY, L HAND ENG BEGAN SIMILAR OPERATION. MAINTAINED POSITIVE CTL OF ACFT WHILE PERFORMING NORMAL TROUBLESHOOTING PROC. WAS UNABLE TO REESTABLISH NORMAL ENG OPERATION PRIOR TO REACHING A SAFE ALT FROM WHICH TO MAKE A NORMAL LNDG. I ELECTED TO LAND IN A NEARBY FIELD WHICH ALLOWED ME A SAFE APCH AND LNDG INTO THE WIND. NO DAMAGE WAS INCURRED BY ACFT OR OCCUPANTS. SUBSEQUENT INVESTIGATION, STILL INCOMPLETE, SEEMS TO INDICATE FUEL CONTAMINATION AND POSSIBLY UNDERLYING ENG PROB.

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.