Flight crew of a british hawker, HS25, observed a westwind 1124 making a right turn to avoid them during climb out from the airport to which the reporting hawker was descending. Approach controller had issued a TA earlier when the westwind was at a lower altitude.

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Attributes
ACN	432608
Time
Date	199904
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : psp.airport
State Reference	CA
Altitude	msl single value : 6400
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : psp.tracon
Operator	general aviation : corporate
Make Model Name	HS 125 Series 1-600
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : psp.tracon
Operator	general aviation : corporate
Make Model Name	IAI1124/1124A/Westwind
Operating Under FAR Part	Part 91
Flight Phase	climbout : initial
Person 1
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : multi engine
Experience	flight time last 90 days : 150 flight time total : 15000 flight time type : 900
ASRS Report	432608
Person 2
Affiliation	company : corporate
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
Events
Anomaly	conflict : airborne less severe
Independent Detector	other flight crewa other flight crewb
Resolutory Action	controller : issued advisory flight crew : took precautionary avoidance action
Miss Distance	horizontal : 1500 vertical : 200
Supplementary
Problem Areas	ATC Human Performance Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

Cleared for visual approach and traffic advised to be 4400 ft at 10 O'clock position, while descending from 6400 ft. We turned base to see the westwind at 9 O'clock position. They saw us and turned right. Classic of us descending and the westwind climbing into each other. Poor controling efforts my approach. We were not aware of aircraft type or that they were climbing. See and avoid. The westwind crew was sharp. We were 90 degrees to them after the turn and couldn't see them until we rolled out level wings, at which they were highly visible. It didn't appear they had to make extreme corrections. I don't feel ATC should have put a climbing and descending jet so close. They could have easily provided a vector or two, even though traffic avoidance is still the responsibility of the crews.

Original NASA ASRS Text

Title: FLC OF A BRITISH HAWKER, HS25, OBSERVED A WESTWIND 1124 MAKING A R TURN TO AVOID THEM DURING CLBOUT FROM THE ARPT TO WHICH THE RPTING HAWKER WAS DSNDING. APCH CTLR HAD ISSUED A TA EARLIER WHEN THE WESTWIND WAS AT A LOWER ALT.

Narrative: CLRED FOR VISUAL APCH AND TFC ADVISED TO BE 4400 FT AT 10 O'CLOCK POS, WHILE DSNDING FROM 6400 FT. WE TURNED BASE TO SEE THE WESTWIND AT 9 O'CLOCK POS. THEY SAW US AND TURNED R. CLASSIC OF US DSNDING AND THE WESTWIND CLBING INTO EACH OTHER. POOR CTLING EFFORTS MY APCH. WE WERE NOT AWARE OF ACFT TYPE OR THAT THEY WERE CLBING. SEE AND AVOID. THE WESTWIND CREW WAS SHARP. WE WERE 90 DEGS TO THEM AFTER THE TURN AND COULDN'T SEE THEM UNTIL WE ROLLED OUT LEVEL WINGS, AT WHICH THEY WERE HIGHLY VISIBLE. IT DIDN'T APPEAR THEY HAD TO MAKE EXTREME CORRECTIONS. I DON'T FEEL ATC SHOULD HAVE PUT A CLBING AND DSNDING JET SO CLOSE. THEY COULD HAVE EASILY PROVIDED A VECTOR OR TWO, EVEN THOUGH TFC AVOIDANCE IS STILL THE RESPONSIBILITY OF THE CREWS.

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.