Small transport has turbo system failure on right engine. Return land.

Attributes
ACN	242152
Time
Date	199305
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : luk
State Reference	OH
Altitude	msl bound lower : 12000 msl bound upper : 12000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : on vectors enroute airway : zid
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private pilot : instrument
Experience	flight time last 90 days : 19 flight time total : 3300
ASRS Report	242152
Person 2
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : declared emergency other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

I had a sudden yaw of the airplane to the right. Manifold pressure dropped in the right engine. I had just taken off from lunken airport in cincinnati and was climbing through approximately 12000 ft when this happened. I requested vectors back to lunken and descent to a lower altitude. I did not declare an emergency. After sizing up the problem, it was my impression that I had a complete turbo system failure on the right engine. I kept the right engine at idle and used it for the landing, which was uneventful. Again, I did not declare an emergency or request special handling. After landing, it was discovered that the right turbo hose had blown off the air box on the right engine causing the failure. The hose was put back on and it was signed off by a mechanic. During the process, the FAA came for a ramp check, which was completed. I topped the tanks and left for amarillo. When I was returning to lunken, I told the controller that I could not hold 11000 ft and, at that time, I was not sure whether I had a complete right engine failure or a turbo failure. They gave me a lower altitude.

Original NASA ASRS Text

Title: SMT HAS TURBO SYS FAILURE ON R ENG. RETURN LAND.

Narrative: I HAD A SUDDEN YAW OF THE AIRPLANE TO THE R. MANIFOLD PRESSURE DROPPED IN THE R ENG. I HAD JUST TAKEN OFF FROM LUNKEN ARPT IN CINCINNATI AND WAS CLBING THROUGH APPROX 12000 FT WHEN THIS HAPPENED. I REQUESTED VECTORS BACK TO LUNKEN AND DSCNT TO A LOWER ALT. I DID NOT DECLARE AN EMER. AFTER SIZING UP THE PROB, IT WAS MY IMPRESSION THAT I HAD A COMPLETE TURBO SYS FAILURE ON THE R ENG. I KEPT THE R ENG AT IDLE AND USED IT FOR THE LNDG, WHICH WAS UNEVENTFUL. AGAIN, I DID NOT DECLARE AN EMER OR REQUEST SPECIAL HANDLING. AFTER LNDG, IT WAS DISCOVERED THAT THE R TURBO HOSE HAD BLOWN OFF THE AIR BOX ON THE R ENG CAUSING THE FAILURE. THE HOSE WAS PUT BACK ON AND IT WAS SIGNED OFF BY A MECH. DURING THE PROCESS, THE FAA CAME FOR A RAMP CHK, WHICH WAS COMPLETED. I TOPPED THE TANKS AND LEFT FOR AMARILLO. WHEN I WAS RETURNING TO LUNKEN, I TOLD THE CTLR THAT I COULD NOT HOLD 11000 FT AND, AT THAT TIME, I WAS NOT SURE WHETHER I HAD A COMPLETE R ENG FAILURE OR A TURBO FAILURE. THEY GAVE ME A LOWER ALT.

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.