Emergency declared when a low time private pilot in a bellanca viking loses engine power on a 4 mi base leg from landing runway 31 at abe, PA.

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Attributes
ACN	579405
Time
Date	200304
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : abe.airport
State Reference	PA
Altitude	msl single value : 1300
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : abe.tower
Operator	general aviation : personal
Make Model Name	Viking
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	None
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : private pilot : instrument
Experience	flight time last 90 days : 10 flight time total : 430 flight time type : 75
ASRS Report	579405
Person 2
Affiliation	government : faa
Function	controller : local
Events
Anomaly	aircraft equipment problem : critical non adherence : published procedure other anomaly other
Independent Detector	other flight crewa
Resolutory Action	aircraft : equipment problem dissipated flight crew : declared emergency flight crew : returned to intended or assigned course
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

Cleared to land runway 31 at abe. Preparing for base to final turn and adjusted mixture to full rich, and engine started to run rough and loose power. Returned mixture to previous setting. There was no change, engine still running rough. As I was close to the ground, I informed abe tower that I had a problem and selected a field in which to land. I started emergency procedures. During procedures, engine returned to full power. All gauges indicated normal. Made a normal landing on originally cleared runway 31.

Original NASA ASRS Text

Title: EMER DECLARED WHEN A LOW TIME PVT PLT IN A BELLANCA VIKING LOSES ENG PWR ON A 4 MI BASE LEG FROM LNDG RWY 31 AT ABE, PA.

Narrative: CLRED TO LAND RWY 31 AT ABE. PREPARING FOR BASE TO FINAL TURN AND ADJUSTED MIXTURE TO FULL RICH, AND ENG STARTED TO RUN ROUGH AND LOOSE PWR. RETURNED MIXTURE TO PREVIOUS SETTING. THERE WAS NO CHANGE, ENG STILL RUNNING ROUGH. AS I WAS CLOSE TO THE GND, I INFORMED ABE TWR THAT I HAD A PROB AND SELECTED A FIELD IN WHICH TO LAND. I STARTED EMER PROCS. DURING PROCS, ENG RETURNED TO FULL PWR. ALL GAUGES INDICATED NORMAL. MADE A NORMAL LNDG ON ORIGINALLY CLRED RWY 31.

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.