<< >> NASA ASRS Report 486027, September 2000

Learjet 35 flight crew failed to turn as soon as departure controller expected after takeoff causing a loss of separation with a beech travelair, BE95, on initial climb out from nearby airport.

Attributes
ACN	486027
Time
Date	200009
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : bna.airport
State Reference	TN
Altitude	msl bound lower : 3200 msl bound upper : 3700
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : bna.tracon
Operator	general aviation : personal
Make Model Name	Travelair 95
Operating Under FAR Part	Part 91
Flight Phase	climbout : initial
Route In Use	departure : on vectors
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : bna.tracon
Operator	general aviation : corporate
Make Model Name	Learjet 35
Operating Under FAR Part	Part 91
Flight Phase	climbout : initial
Route In Use	departure : on vectors
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : departure
Qualification	controller : radar
Experience	controller radar : 18
ASRS Report	486027
Person 2
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : commercial pilot : instrument pilot : multi engine
Events
Anomaly	conflict : airborne critical non adherence : required legal separation non adherence : published procedure
Independent Detector	atc equipment other atc equipment : radar other controllera
Resolutory Action	controller : separated traffic controller : issued alert
Miss Distance	horizontal : 10000 vertical : 700
Supplementary
Problem Areas	ATC Human Performance Flight Crew Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

The travelair departed runway 20C at bna on a 110 degree heading. On initial contact, I turned him to 020 degrees to clear mqy (smyrna VFR tower) airspace. I had released the LR35 off mqy runway 32 with instructions 'immediate 090 degree heading to maintain 3000 ft.' upon liftoff, I observed the LR35 flying runway heading. My first contact was 3 mi, still runway heading. I turned him again to 090 degrees. His rate of turn was 1/2 standard and he flew through (behind) the travelair. If the LR35 had followed instructions, 090 degrees in a timely manner, separation would not have been lost. This 'error' on my part was reported.

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Original NASA ASRS Text

Title: LEARJET 35 FLC FAILED TO TURN AS SOON AS DEP CTLR EXPECTED AFTER TKOF CAUSING A LOSS OF SEPARATION WITH A BEECH TRAVELAIR, BE95, ON INITIAL CLBOUT FROM NEARBY ARPT.

Narrative: THE TRAVELAIR DEPARTED RWY 20C AT BNA ON A 110 DEG HDG. ON INITIAL CONTACT, I TURNED HIM TO 020 DEGS TO CLR MQY (SMYRNA VFR TWR) AIRSPACE. I HAD RELEASED THE LR35 OFF MQY RWY 32 WITH INSTRUCTIONS 'IMMEDIATE 090 DEG HDG TO MAINTAIN 3000 FT.' UPON LIFTOFF, I OBSERVED THE LR35 FLYING RWY HDG. MY FIRST CONTACT WAS 3 MI, STILL RWY HDG. I TURNED HIM AGAIN TO 090 DEGS. HIS RATE OF TURN WAS 1/2 STANDARD AND HE FLEW THROUGH (BEHIND) THE TRAVELAIR. IF THE LR35 HAD FOLLOWED INSTRUCTIONS, 090 DEGS IN A TIMELY MANNER, SEPARATION WOULD NOT HAVE BEEN LOST. THIS 'ERROR' ON MY PART WAS RPTED.

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.