Air carrier turbojet deviates from cleared track due to cockpit distraction in cpr airspace.

Attributes
ACN	423477
Time
Date	199812
Day	Fri
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : cpr
State Reference	WY
Altitude	msl bound lower : 13000 msl bound upper : 13000
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Controlling Facilities	tower : luk
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Route In Use	arrival other arrival star : star
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : flight engineer
Experience	flight time last 90 days : 80 flight time total : 10200 flight time type : 80
ASRS Report	423477
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial
Events
Anomaly	non adherence : clearance non adherence : far other spatial deviation
Independent Detector	other controllera other flight crewa
Consequence	Other
Supplementary
Air Traffic Incident	Pilot Deviation

Narrative:

We were cleared to descend to 13000 ft and intercept the 29 DME arc for an ILS approach to runway 3 at casper, wy. We were IFR throughout the descent and initially picked up light mixed icing. Later we encountered moderate mixed icing and I had the wing anti-ice opened and advanced the thrust levers to 70% as per the aircraft flight manual. The first officer was PF and he queried me about the increased power setting and said it should only be 55% N1. We were at 49 DME, so I pulled out the quick reference cards and showed him it was 70% N1 and we discussed anti-ice use. When I looked again at the DME it was 23 and I told the first officer to turn immediately to reintercept the arc. Approach control queried us at this time asking us if we were going to intercept the arc. In informed them we were in the turn correcting back. We intercepted the arc and the rest of the approach was uneventful. Lesson learned is that I should have just said to the first officer we were going to use 70% N1 for anti-ice and we would discuss it once on the ground. This would not have caused the distraction resulting in passing through the arc and our having to reintercept it.

Original NASA ASRS Text

Title: ACR TURBOJET DEVIATES FROM CLRED TRACK DUE TO COCKPIT DISTR IN CPR AIRSPACE.

Narrative: WE WERE CLRED TO DSND TO 13000 FT AND INTERCEPT THE 29 DME ARC FOR AN ILS APCH TO RWY 3 AT CASPER, WY. WE WERE IFR THROUGHOUT THE DSCNT AND INITIALLY PICKED UP LIGHT MIXED ICING. LATER WE ENCOUNTERED MODERATE MIXED ICING AND I HAD THE WING ANTI-ICE OPENED AND ADVANCED THE THRUST LEVERS TO 70% AS PER THE ACFT FLT MANUAL. THE FO WAS PF AND HE QUERIED ME ABOUT THE INCREASED PWR SETTING AND SAID IT SHOULD ONLY BE 55% N1. WE WERE AT 49 DME, SO I PULLED OUT THE QUICK REF CARDS AND SHOWED HIM IT WAS 70% N1 AND WE DISCUSSED ANTI-ICE USE. WHEN I LOOKED AGAIN AT THE DME IT WAS 23 AND I TOLD THE FO TO TURN IMMEDIATELY TO REINTERCEPT THE ARC. APCH CTL QUERIED US AT THIS TIME ASKING US IF WE WERE GOING TO INTERCEPT THE ARC. IN INFORMED THEM WE WERE IN THE TURN CORRECTING BACK. WE INTERCEPTED THE ARC AND THE REST OF THE APCH WAS UNEVENTFUL. LESSON LEARNED IS THAT I SHOULD HAVE JUST SAID TO THE FO WE WERE GOING TO USE 70% N1 FOR ANTI-ICE AND WE WOULD DISCUSS IT ONCE ON THE GND. THIS WOULD NOT HAVE CAUSED THE DISTR RESULTING IN PASSING THROUGH THE ARC AND OUR HAVING TO REINTERCEPT IT.

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.