C340 pilot flying practice ILS delays compliance with tower instruction to turn due to an opposite direction departing aircraft. Cites difficulty engaging go around function of autoplt. Near midair collision results.

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Attributes
ACN	739989
Time
Date	200705
Place
Locale Reference	airport : apa.airport
State Reference	CO
Altitude	msl single value : 6100
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : apa.tower
Operator	general aviation : personal
Make Model Name	Cessna 340/340A
Operating Under FAR Part	Part 91
Navigation In Use	ils other localizer
Flight Phase	descent : approach
Flight Plan	VFR
Aircraft 2
Controlling Facilities	tower : apa.tower
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	climbout : takeoff
Flight Plan	VFR
Person 1
Affiliation	other
Function	oversight : pic
Qualification	pilot : multi engine pilot : atp
Experience	flight time last 90 days : 20 flight time total : 3100 flight time type : 1100
ASRS Report	739989
Person 2
Affiliation	other
Events
Anomaly	aircraft equipment problem : critical conflict : nmac non adherence : clearance non adherence : required legal separation
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Miss Distance	horizontal : 0 vertical : 100
Supplementary
Problem Areas	Aircraft ATC Human Performance Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

I was on practice ILS runway 35R approach at apa nearing the decision ht with a safety pilot as another aircraft was taking off in the opposite direction (runway 17L). The tower called for us to turn right. I delayed; due to trying to have the 'go around' function on the autoplt do this. Although I turned the heading bug on the HSI to make a right turn; I did not push the heading function to engage it; thus delaying the required right turnout until the aircraft taking off had passed above us.

Original NASA ASRS Text

Title: C340 PLT FLYING PRACTICE ILS DELAYS COMPLIANCE WITH TOWER INSTRUCTION TO TURN DUE TO AN OPPOSITE DIRECTION DEPARTING ACFT. CITES DIFFICULTY ENGAGING GAR FUNCTION OF AUTOPLT. NMAC RESULTS.

Narrative: I WAS ON PRACTICE ILS RWY 35R APCH AT APA NEARING THE DECISION HT WITH A SAFETY PLT AS ANOTHER ACFT WAS TAKING OFF IN THE OPPOSITE DIRECTION (RWY 17L). THE TWR CALLED FOR US TO TURN R. I DELAYED; DUE TO TRYING TO HAVE THE 'GAR' FUNCTION ON THE AUTOPLT DO THIS. ALTHOUGH I TURNED THE HDG BUG ON THE HSI TO MAKE A R TURN; I DID NOT PUSH THE HDG FUNCTION TO ENGAGE IT; THUS DELAYING THE REQUIRED R TURNOUT UNTIL THE ACFT TAKING OFF HAD PASSED ABOVE US.

Data retrieved from NASA's ASRS site as of January 2009 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.