Airborne conflict between small aircraft X and large transport Y in TCA.

Attributes
ACN	133717
Time
Date	199001
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : den
State Reference	CO
Altitude	msl bound lower : 7500 msl bound upper : 10500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : den
Operator	other
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	descent other
Flight Plan	VFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private
Experience	flight time last 90 days : 9 flight time total : 235 flight time type : 30
ASRS Report	133717
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Miss Distance	horizontal : 1000 vertical : 500
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	other

Narrative:

Small aircraft X contacted ATC at 19 DME southwest of denver at 10,500 MSL, was told to descend to 7500, northbound to 48V. Requested and received clearance to proceed via I-25 corridor to minimize turbulence near mountains. Controller advised there would be traffic, large transport Y, leaving denver 180 degree heading. He would 'jump' me. No further traffic advisory was given. Moments later, large jet appeared at approximately 1 O'clock position, and made a climbing right turn ahead and above our flight path. I feel this was not sufficient separation between heavy and light aircraft in TCA. Controller should have advised us of jet's position and flight path. I do not know if jet was told of our presence. Strong northwest flow could have caused less climb over distance for jet than controller estimated.

Original NASA ASRS Text

Title: AIRBORNE CONFLICT BETWEEN SMA X AND LGT Y IN TCA.

Narrative: SMA X CONTACTED ATC AT 19 DME SW OF DENVER AT 10,500 MSL, WAS TOLD TO DSND TO 7500, NBOUND TO 48V. REQUESTED AND RECEIVED CLRNC TO PROCEED VIA I-25 CORRIDOR TO MINIMIZE TURBULENCE NEAR MOUNTAINS. CTLR ADVISED THERE WOULD BE TFC, LGT Y, LEAVING DENVER 180 DEG HDG. HE WOULD 'JUMP' ME. NO FURTHER TFC ADVISORY WAS GIVEN. MOMENTS LATER, LARGE JET APPEARED AT APPROX 1 O'CLOCK POSITION, AND MADE A CLIMBING RIGHT TURN AHEAD AND ABOVE OUR FLT PATH. I FEEL THIS WAS NOT SUFFICIENT SEPARATION BETWEEN HEAVY AND LIGHT ACFT IN TCA. CTLR SHOULD HAVE ADVISED US OF JET'S POSITION AND FLT PATH. I DO NOT KNOW IF JET WAS TOLD OF OUR PRESENCE. STRONG NW FLOW COULD HAVE CAUSED LESS CLIMB OVER DISTANCE FOR JET THAN CTLR ESTIMATED.

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.