Near midair collision.

Attributes
ACN	252246
Time
Date	199309
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : slc
State Reference	UT
Altitude	msl bound lower : 9000 msl bound upper : 9800
Environment
Flight Conditions	Marginal
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : slc
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Retractable Gear
Flight Phase	cruise other
Route In Use	enroute : direct
Flight Plan	VFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 15000 flight time type : 2000
ASRS Report	252246
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 230 flight time total : 3500 flight time type : 500
ASRS Report	252365
Events
Anomaly	conflict : nmac non adherence : far other anomaly other other spatial deviation
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 350 vertical : 300
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Near miss on climb. On 340 degree heading, 210 KTS per ATC, passing approximately 9000 ft, ATC called 'traffic 11 O'clock, 2 mi, type and altitude unknown.' not in sight. Haze was the backgnd. ATC issued a right turn to intercept airway (climb continued). TCASII showed a very brief flash target at 11 O'clock with 9.74 displayed, but it was gone before I could judge range. TCASII display was an open diamond. During turn, the small aircraft appeared in top of side window. I leveled and changed to slight left turn and passed below and behind small aircraft. If the climbing right turn had been continued, I think we would have collided. Small aircraft was visible for only 3- 3-4 seconds and seemed level and eastbound. Copilot unable to see at any time because of windshield cutoff angle. See and avoid is not adequate and TCASII won't help if one transponder inoperative or weak.

Original NASA ASRS Text

Title: NMAC.

Narrative: NEAR MISS ON CLB. ON 340 DEG HDG, 210 KTS PER ATC, PASSING APPROX 9000 FT, ATC CALLED 'TFC 11 O'CLOCK, 2 MI, TYPE AND ALT UNKNOWN.' NOT IN SIGHT. HAZE WAS THE BACKGND. ATC ISSUED A R TURN TO INTERCEPT AIRWAY (CLB CONTINUED). TCASII SHOWED A VERY BRIEF FLASH TARGET AT 11 O'CLOCK WITH 9.74 DISPLAYED, BUT IT WAS GONE BEFORE I COULD JUDGE RANGE. TCASII DISPLAY WAS AN OPEN DIAMOND. DURING TURN, THE SMA APPEARED IN TOP OF SIDE WINDOW. I LEVELED AND CHANGED TO SLIGHT L TURN AND PASSED BELOW AND BEHIND SMA. IF THE CLBING R TURN HAD BEEN CONTINUED, I THINK WE WOULD HAVE COLLIDED. SMA WAS VISIBLE FOR ONLY 3- 3-4 SECONDS AND SEEMED LEVEL AND EBOUND. COPLT UNABLE TO SEE AT ANY TIME BECAUSE OF WINDSHIELD CUTOFF ANGLE. SEE AND AVOID IS NOT ADEQUATE AND TCASII WON'T HELP IF ONE XPONDER INOP OR WEAK.

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.