Narrative:

We were departing L15 (henderson executive airport) as the 8TH of 9 BEC99's to depart in sequence to proceed on a charted and approved departure course ('sub 1'). We were cleared to depart on the sub 1 by las departure (our standard departure for a grand canyon tour) which involves remaining level at 3500 ft MSL until cleared for higher by las departure. After takeoff, we climbed straight out on a heading of 180 degrees and at 2900 ft MSL turned right to our approved heading of 360 degrees (this keeps us clear of the las class B airspace). In the turn, las departure instructed us to 'turn immediately to 270 degrees...inbound traffic, a beech bonanza at 11:30-12 O'clock position, 3500 ft.' I was the PF and did as instructed. Both the captain and I looked for the traffic and could not see him. At this point, we were level at 3500 ft MSL and well into the class B airspace (due to following ATC instructions to turn to 270 degrees). The be-C99 is equipped with tcasi. After approximately 5 seconds, we received a TA. We still did not see the aircraft and continued our turn to 270 degrees. There were numerous targets on tcasi. Finally, the bonanza appeared lower and directly in front of us. As PF, I took evasive action and turned hard to the left to avoid hitting the bonanza. If we had continued on our normal departure procedure after takeoff, the bonanza would have passed well behind us and would have been no factor. However, the instructions to turn to 270 degrees turned us right into his flight path and almost caused a collision. Quick thinking and familiarity with the congested airspace allowed me to respond appropriately. Departure should think twice before giving a heading to avoid traffic.

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Original NASA ASRS Text

Title: A VFR BEECH 99 AIRLINER DEPARTING HENDERSON HAS AN NMAC WITH AN INBOUND VFR BONANZA 1 MI SW OF L15 WHILE UNDER CTL OF RADAR DEP CTLR AT LAS, NV.

Narrative: WE WERE DEPARTING L15 (HENDERSON EXECUTIVE ARPT) AS THE 8TH OF 9 BEC99'S TO DEPART IN SEQUENCE TO PROCEED ON A CHARTED AND APPROVED DEP COURSE ('SUB 1'). WE WERE CLRED TO DEPART ON THE SUB 1 BY LAS DEP (OUR STANDARD DEP FOR A GRAND CANYON TOUR) WHICH INVOLVES REMAINING LEVEL AT 3500 FT MSL UNTIL CLRED FOR HIGHER BY LAS DEP. AFTER TKOF, WE CLBED STRAIGHT OUT ON A HDG OF 180 DEGS AND AT 2900 FT MSL TURNED R TO OUR APPROVED HDG OF 360 DEGS (THIS KEEPS US CLR OF THE LAS CLASS B AIRSPACE). IN THE TURN, LAS DEP INSTRUCTED US TO 'TURN IMMEDIATELY TO 270 DEGS...INBOUND TFC, A BEECH BONANZA AT 11:30-12 O'CLOCK POS, 3500 FT.' I WAS THE PF AND DID AS INSTRUCTED. BOTH THE CAPT AND I LOOKED FOR THE TFC AND COULD NOT SEE HIM. AT THIS POINT, WE WERE LEVEL AT 3500 FT MSL AND WELL INTO THE CLASS B AIRSPACE (DUE TO FOLLOWING ATC INSTRUCTIONS TO TURN TO 270 DEGS). THE BE-C99 IS EQUIPPED WITH TCASI. AFTER APPROX 5 SECONDS, WE RECEIVED A TA. WE STILL DID NOT SEE THE ACFT AND CONTINUED OUR TURN TO 270 DEGS. THERE WERE NUMEROUS TARGETS ON TCASI. FINALLY, THE BONANZA APPEARED LOWER AND DIRECTLY IN FRONT OF US. AS PF, I TOOK EVASIVE ACTION AND TURNED HARD TO THE L TO AVOID HITTING THE BONANZA. IF WE HAD CONTINUED ON OUR NORMAL DEP PROC AFTER TKOF, THE BONANZA WOULD HAVE PASSED WELL BEHIND US AND WOULD HAVE BEEN NO FACTOR. HOWEVER, THE INSTRUCTIONS TO TURN TO 270 DEGS TURNED US RIGHT INTO HIS FLT PATH AND ALMOST CAUSED A COLLISION. QUICK THINKING AND FAMILIARITY WITH THE CONGESTED AIRSPACE ALLOWED ME TO RESPOND APPROPRIATELY. DEP SHOULD THINK TWICE BEFORE GIVING A HDG TO AVOID TFC.

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.