Small aircraft with brand new engine modification suffers engine failure.

Attributes
ACN	174588
Time
Date	199103
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : cygp
State Reference	PQ
Altitude	msl bound lower : 4000 msl bound upper : 21000
Environment
Flight Conditions	Mixed
Light	Night
Aircraft 1
Controlling Facilities	artcc : czul
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Retractable Gear
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : commercial
Experience	flight time last 90 days : 50 flight time total : 1600 flight time type : 1500
ASRS Report	174588
Person 2
Affiliation	government other
Function	controller : radar
Qualification	controller : radar
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	aircraft : equipment problem dissipated controller : issued new clearance flight crew : declared emergency
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

I was ferrying an small aircraft that had been reconditioned into a super small aircraft. While climbing to FL210 through thin layers but cr on top, the turbine inlet tempt and the exhaust gas temperature began fluctuating and the engine quit. Czul cleared me to descend to gaspe and approximately 4000' the engine began running roughly. Due to low visibility and ceiling, I shot a localizer back-course to runway 29 at gaspe. On final approach, the engine began running smoothly. This was the second engine failure in this aircraft. A detailed verbal description of the emergency was given to czul.

Original NASA ASRS Text

Title: SMA WITH BRAND NEW ENGINE MODIFICATION SUFFERS ENGINE FAILURE.

Narrative: I WAS FERRYING AN SMA THAT HAD BEEN RECONDITIONED INTO A SUPER SMA. WHILE CLBING TO FL210 THROUGH THIN LAYERS BUT CR ON TOP, THE TURBINE INLET TEMPT AND THE EXHAUST GAS TEMP BEGAN FLUCTUATING AND THE ENG QUIT. CZUL CLRED ME TO DSND TO GASPE AND APPROX 4000' THE ENG BEGAN RUNNING ROUGHLY. DUE TO LOW VISIBILITY AND CEILING, I SHOT A LOC BACK-COURSE TO RWY 29 AT GASPE. ON FINAL APCH, THE ENG BEGAN RUNNING SMOOTHLY. THIS WAS THE SECOND ENG FAILURE IN THIS ACFT. A DETAILED VERBAL DESCRIPTION OF THE EMER WAS GIVEN TO CZUL.

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.