Hazards of potential conflict reduced by advance TA given by TRACON departure controller.

Attributes
ACN	262643
Time
Date	199402
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : sna
State Reference	CA
Altitude	msl bound lower : 1700 msl bound upper : 1700
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : sna tower : sna
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude climbout : takeoff
Route In Use	departure other departure sid : sid
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	cruise other descent other
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : commercial pilot : instrument
Experience	flight time last 90 days : 180 flight time total : 16000 flight time type : 900
ASRS Report	262643
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	conflict : airborne less severe non adherence : far other anomaly other other anomaly other
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance flight crew : took evasive action other
Consequence	Other
Miss Distance	horizontal : 3200 vertical : 200
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation Inter Facility Coordination Failure

Narrative:

Departed sna 19R on a musel 5 SID, cleared to 5000 ft. Immediately after takeoff, tower told us to maintain 2000 ft for traffic and handed us off to coast approach. Approach repeated the 2000 ft restr and advised of non-altitude transponder target crossing departure path. They thought intruder was above 2000 ft and did not have 2 way communication with it. While turning to 175 degrees heading and approching 2000 ft, we spotted intruder about 1 O'clock and crossing right to left. He appeared to be same altitude (about 1700 ft) and descending on an easterly heading. We immediately started a right turn for avoidance. The other airplane turned away from us at almost the same time. Nearest point of approach was about 3/4 of a mile. Credit should be given to heads-up alert given by ATC. Without their warning this event could have been a close call. We did receive a TA from TCASII about the time we sighted the intruder, but prior warning helped immeasurably.

Original NASA ASRS Text

Title: HAZARDS OF POTENTIAL CONFLICT REDUCED BY ADVANCE TA GIVEN BY TRACON DEP CTLR.

Narrative: DEPARTED SNA 19R ON A MUSEL 5 SID, CLRED TO 5000 FT. IMMEDIATELY AFTER TKOF, TWR TOLD US TO MAINTAIN 2000 FT FOR TFC AND HANDED US OFF TO COAST APCH. APCH REPEATED THE 2000 FT RESTR AND ADVISED OF NON-ALT XPONDER TARGET XING DEP PATH. THEY THOUGHT INTRUDER WAS ABOVE 2000 FT AND DID NOT HAVE 2 WAY COM WITH IT. WHILE TURNING TO 175 DEGS HDG AND APPROCHING 2000 FT, WE SPOTTED INTRUDER ABOUT 1 O'CLOCK AND XING R TO L. HE APPEARED TO BE SAME ALT (ABOUT 1700 FT) AND DSNDING ON AN EASTERLY HDG. WE IMMEDIATELY STARTED A R TURN FOR AVOIDANCE. THE OTHER AIRPLANE TURNED AWAY FROM US AT ALMOST THE SAME TIME. NEAREST POINT OF APCH WAS ABOUT 3/4 OF A MILE. CREDIT SHOULD BE GIVEN TO HEADS-UP ALERT GIVEN BY ATC. WITHOUT THEIR WARNING THIS EVENT COULD HAVE BEEN A CLOSE CALL. WE DID RECEIVE A TA FROM TCASII ABOUT THE TIME WE SIGHTED THE INTRUDER, BUT PRIOR WARNING HELPED IMMEASURABLY.

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.