Small transport near midair collision with small aircraft.

Attributes
ACN	113901
Time
Date	198906
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : las
State Reference	NV
Altitude	msl bound lower : 7000 msl bound upper : 7300
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : las
Operator	common carrier : air taxi
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
Flight Phase	cruise other descent other
Route In Use	arrival other
Flight Plan	VFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Retractable Gear
Flight Phase	climbout : intermediate altitude cruise other
Flight Plan	None
Person 1
Affiliation	company : air taxi
Function	flight crew : single pilot
Qualification	pilot : flight engineer pilot : cfi pilot : atp
Experience	flight time last 90 days : 150 flight time total : 2600 flight time type : 100
ASRS Report	113901
Person 2
Affiliation	Other
Function	flight crew : single pilot
Events
Anomaly	conflict : nmac non adherence : far
Independent Detector	other controllera other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 150 vertical : 300
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Having contacted las vegas approach approximately 40 NM northeast of the las airport at 8500' MSL, I was advised of radar contact. I was cleared into the las TCA and was to fly the golf arrival to runway 19R. A traffic advisory was issued to a preceding air taxi operator for VFR traffic that was headed eastbound, altitude unknown. The traffic was spotted by this pilot. He advised ATC that the unknown traffic's altitude appeared to be 5500 MSL. Having heard this I immediately slowed my descent to approximately 200 FPM, while continuously scanning for the traffic. ATC did not issue any advisories to me for this traffic. I suspect the traffic had begun climbing since being first spotted. I had begun shallow turns left and right while continuing to descend. The traffic appeared at approximately the 1:30 position, slightly to the right of my course and just below my aircraft. I immediately pulled the aircraft up to approximately 15 degree nose up and made a slight right turn so that I could see the other aircraft. The other aircraft, I believe it was an small aircraft Y, did not appear to take any evasive action. I queried ATC about any traffic in my immediate vicinity, but the controller advised that he did not have any traffic on his scope. I advised him of the near miss and that the small aircraft Y was headed eastbound at approximately 7000 MSL. The controller did issue advisories to the aircraft that were following me. I wonder if the controller truly didn't have any traffic in my vicinity, or if he was too busy or preoccupied to issue an advisory?

Original NASA ASRS Text

Title: SMT NMAC WITH SMA.

Narrative: HAVING CONTACTED LAS VEGAS APCH APPROX 40 NM NE OF THE LAS ARPT AT 8500' MSL, I WAS ADVISED OF RADAR CONTACT. I WAS CLRED INTO THE LAS TCA AND WAS TO FLY THE GOLF ARR TO RWY 19R. A TFC ADVISORY WAS ISSUED TO A PRECEDING AIR TAXI OPERATOR FOR VFR TFC THAT WAS HEADED EBND, ALT UNKNOWN. THE TFC WAS SPOTTED BY THIS PLT. HE ADVISED ATC THAT THE UNKNOWN TFC'S ALT APPEARED TO BE 5500 MSL. HAVING HEARD THIS I IMMEDIATELY SLOWED MY DSCNT TO APPROX 200 FPM, WHILE CONTINUOUSLY SCANNING FOR THE TFC. ATC DID NOT ISSUE ANY ADVISORIES TO ME FOR THIS TFC. I SUSPECT THE TFC HAD BEGUN CLIMBING SINCE BEING FIRST SPOTTED. I HAD BEGUN SHALLOW TURNS LEFT AND RIGHT WHILE CONTINUING TO DSND. THE TFC APPEARED AT APPROX THE 1:30 POSITION, SLIGHTLY TO THE RIGHT OF MY COURSE AND JUST BELOW MY ACFT. I IMMEDIATELY PULLED THE ACFT UP TO APPROX 15 DEG NOSE UP AND MADE A SLIGHT RIGHT TURN SO THAT I COULD SEE THE OTHER ACFT. THE OTHER ACFT, I BELIEVE IT WAS AN SMA Y, DID NOT APPEAR TO TAKE ANY EVASIVE ACTION. I QUERIED ATC ABOUT ANY TFC IN MY IMMEDIATE VICINITY, BUT THE CTLR ADVISED THAT HE DID NOT HAVE ANY TFC ON HIS SCOPE. I ADVISED HIM OF THE NEAR MISS AND THAT THE SMA Y WAS HEADED EBND AT APPROX 7000 MSL. THE CTLR DID ISSUE ADVISORIES TO THE ACFT THAT WERE FOLLOWING ME. I WONDER IF THE CTLR TRULY DIDN'T HAVE ANY TFC IN MY VICINITY, OR IF HE WAS TOO BUSY OR PREOCCUPIED TO ISSUE AN ADVISORY?

Data retrieved from NASA's ASRS site as of August 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.