Near midair collision. Opposite direction climbing traffic.

Attributes
ACN	276471
Time
Date	199407
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : bld airport : las
State Reference	NV
Altitude	msl bound lower : 11000 msl bound upper : 11300
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zzz
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	cruise other
Route In Use	arrival other arrival star : star enroute airway : las
Flight Plan	IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : direct
Flight Plan	VFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : instrument pilot : atp
Experience	flight time last 90 days : 250 flight time total : 10000 flight time type : 6500
ASRS Report	276471
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : nmac non adherence : clearance other anomaly other other spatial deviation
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 500 vertical : 200
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Flight was on the cresco 3 arrival into las. With las approach at 11000 ft at approximately XA20Z, las advised traffic at 12 O'clock, 10500 ft, unconfirmed, 5 mi. At 4 mi, traffic appeared on TCASII-4 yellow (400 ft below our altitude) at 12 O'clock. Then still at 12 O'clock, touching our inner circle on TCASII, the advisory changed to red and -03 (300 ft below) then -02 with my immediate concern for a collision and ATC advising traffic still at my 12 O'clock, I turned right 90 degrees. At this turn, the RA advised climb (green in 2000 FPM up) which I also initiated. I looked just left of my 12 O'clock and I saw traffic, now finally turned to his right and the advisory went out. We advised ATC of TCASII and RA and our course of action. We gained only a few hundred ft before recognizing the traffic and resumed the arrival. The traffic was a low wing aircraft.

Original NASA ASRS Text

Title: NMAC. OPPOSITE DIRECTION CLBING TFC.

Narrative: FLT WAS ON THE CRESCO 3 ARR INTO LAS. WITH LAS APCH AT 11000 FT AT APPROX XA20Z, LAS ADVISED TFC AT 12 O'CLOCK, 10500 FT, UNCONFIRMED, 5 MI. AT 4 MI, TFC APPEARED ON TCASII-4 YELLOW (400 FT BELOW OUR ALT) AT 12 O'CLOCK. THEN STILL AT 12 O'CLOCK, TOUCHING OUR INNER CIRCLE ON TCASII, THE ADVISORY CHANGED TO RED AND -03 (300 FT BELOW) THEN -02 WITH MY IMMEDIATE CONCERN FOR A COLLISION AND ATC ADVISING TFC STILL AT MY 12 O'CLOCK, I TURNED R 90 DEGS. AT THIS TURN, THE RA ADVISED CLB (GREEN IN 2000 FPM UP) WHICH I ALSO INITIATED. I LOOKED JUST L OF MY 12 O'CLOCK AND I SAW TFC, NOW FINALLY TURNED TO HIS R AND THE ADVISORY WENT OUT. WE ADVISED ATC OF TCASII AND RA AND OUR COURSE OF ACTION. WE GAINED ONLY A FEW HUNDRED FT BEFORE RECOGNIZING THE TFC AND RESUMED THE ARR. THE TFC WAS A LOW WING ACFT.

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.