C208 pilot flies the wrong radial on approach to twf. ATC saves the day.

Attributes
ACN	456193
Time
Date	199912
Day	Wed
Local Time Of Day	0601 To 1200
Place
State Reference	ID
Altitude	msl single value : 12000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Caravan 1 208A
Operating Under FAR Part	Part 135
Flight Phase	descent : approach
Route In Use	approach : instrument precision
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : commercial pilot : cfi pilot : multi engine
Experience	flight time last 90 days : 120 flight time total : 2500 flight time type : 350
ASRS Report	456193
Person 2
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Events
Anomaly	non adherence : far non adherence : clearance non adherence : published procedure other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance controller : provided flight assist flight crew : became reoriented
Consequence	other
Supplementary
Problem Areas	Company Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Flight plan slc to twf. En route on V4, I was given instructions to cross byi VOR and proceed with the byi transition to intercept the twf localizer. After crossing the byi VOR, I made a left turn to fly outbound on the 230 degree radial. Which in fact I turned all the way around to 060 degrees and proceeded to what I believed was the 230 degree radial. I flew this for the extent in which the burley transition states and when I went to switch to the localizer it was not there. Initially, in the first left turn, I made myself disoriented, and did not realize my mistake until twf approach corrected my action. I attribute part of my mistake to work overload, and the other not paying attention to my situational awareness. From day one flying with this company, I have flown aircraft with IFR GPS, and this aircraft did not have one. My work overload came from being told to make an arc to intercept a new victor airway, given 2 holding clrncs, required to give multiple altitude callouts, received a large clearance for the approach, all while flying single pilot IFR. The solution to this problem has been dealt with by my company and I have gone through some retraining.

Original NASA ASRS Text

Title: C208 PLT FLIES THE WRONG RADIAL ON APCH TO TWF. ATC SAVES THE DAY.

Narrative: FLT PLAN SLC TO TWF. ENRTE ON V4, I WAS GIVEN INSTRUCTIONS TO CROSS BYI VOR AND PROCEED WITH THE BYI TRANSITION TO INTERCEPT THE TWF LOC. AFTER XING THE BYI VOR, I MADE A L TURN TO FLY OUTBOUND ON THE 230 DEG RADIAL. WHICH IN FACT I TURNED ALL THE WAY AROUND TO 060 DEGS AND PROCEEDED TO WHAT I BELIEVED WAS THE 230 DEG RADIAL. I FLEW THIS FOR THE EXTENT IN WHICH THE BURLEY TRANSITION STATES AND WHEN I WENT TO SWITCH TO THE LOC IT WAS NOT THERE. INITIALLY, IN THE FIRST L TURN, I MADE MYSELF DISORIENTED, AND DID NOT REALIZE MY MISTAKE UNTIL TWF APCH CORRECTED MY ACTION. I ATTRIBUTE PART OF MY MISTAKE TO WORK OVERLOAD, AND THE OTHER NOT PAYING ATTN TO MY SITUATIONAL AWARENESS. FROM DAY ONE FLYING WITH THIS COMPANY, I HAVE FLOWN ACFT WITH IFR GPS, AND THIS ACFT DID NOT HAVE ONE. MY WORK OVERLOAD CAME FROM BEING TOLD TO MAKE AN ARC TO INTERCEPT A NEW VICTOR AIRWAY, GIVEN 2 HOLDING CLRNCS, REQUIRED TO GIVE MULTIPLE ALT CALLOUTS, RECEIVED A LARGE CLRNC FOR THE APCH, ALL WHILE FLYING SINGLE PLT IFR. THE SOLUTION TO THIS PROB HAS BEEN DEALT WITH BY MY COMPANY AND I HAVE GONE THROUGH SOME RETRAINING.

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.