B757 flight crew successfully avoids aircraft performing aerobatic maneuver on takeoff from sna.

Attributes
ACN	424748
Time
Date	199901
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : sna
State Reference	CA
Altitude	msl bound lower : 600 msl bound upper : 750
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Navigation In Use	Other
Flight Phase	climbout : initial
Route In Use	departure other departure sid : sid
Flight Plan	IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	climbout : initial cruise other
Route In Use	departure other
Flight Plan	VFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
ASRS Report	424748
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial
Events
Anomaly	conflict : nmac non adherence : far other anomaly other
Independent Detector	other flight crewa
Miss Distance	horizontal : 400 vertical : 0

Narrative:

Cleared for takeoff from runway 1L at sna. While climbing out of approximately 500 ft, observed a single engine aircraft climbing off runway 1R with pitch angle above 50 degrees. To increase spacing with small aircraft, we turned 20 degrees left off runway heading to avoid aircraft, who then banked right approximately 70 degrees to turn. We climbed out and missed the aircraft at approximately 750 ft MSL, the returned to assigned heading and normal climb out. The single engine aircraft appeared to be performing aerobatic maneuvers in the traffic pattern and on takeoff, we were not told of such maneuvers occurring in the traffic pattern. The separation was approximately 400 ft when we passed the aircraft. My concern with sna departure is that we did not expect the aircraft to be performing those types of maneuvers on takeoff while we were on our takeoff roll on a 5700 ft runway fully loaded with passenger. The aircraft must have gotten hit with our wake and thrust being that close, someone could have been hurt. This is a safety problem mixing small aircraft and large transport jets at the same field with only 500 ft separation centerline to centerline. Ftw dispatch was notified and mod -- the lax chief on duty was also notified. The near midair collision report was completed with sna tower mod who informed me of the aircraft tail number.

Original NASA ASRS Text

Title: B757 FLC SUCCESSFULLY AVOIDS ACFT PERFORMING AEROBATIC MANEUVER ON TKOF FROM SNA.

Narrative: CLRED FOR TKOF FROM RWY 1L AT SNA. WHILE CLBING OUT OF APPROX 500 FT, OBSERVED A SINGLE ENG ACFT CLBING OFF RWY 1R WITH PITCH ANGLE ABOVE 50 DEGS. TO INCREASE SPACING WITH SMALL ACFT, WE TURNED 20 DEGS L OFF RWY HDG TO AVOID ACFT, WHO THEN BANKED R APPROX 70 DEGS TO TURN. WE CLBED OUT AND MISSED THE ACFT AT APPROX 750 FT MSL, THE RETURNED TO ASSIGNED HDG AND NORMAL CLBOUT. THE SINGLE ENG ACFT APPEARED TO BE PERFORMING AEROBATIC MANEUVERS IN THE TFC PATTERN AND ON TKOF, WE WERE NOT TOLD OF SUCH MANEUVERS OCCURRING IN THE TFC PATTERN. THE SEPARATION WAS APPROX 400 FT WHEN WE PASSED THE ACFT. MY CONCERN WITH SNA DEP IS THAT WE DID NOT EXPECT THE ACFT TO BE PERFORMING THOSE TYPES OF MANEUVERS ON TKOF WHILE WE WERE ON OUR TKOF ROLL ON A 5700 FT RWY FULLY LOADED WITH PAX. THE ACFT MUST HAVE GOTTEN HIT WITH OUR WAKE AND THRUST BEING THAT CLOSE, SOMEONE COULD HAVE BEEN HURT. THIS IS A SAFETY PROB MIXING SMALL ACFT AND LARGE TRANSPORT JETS AT THE SAME FIELD WITH ONLY 500 FT SEPARATION CTRLINE TO CTRLINE. FTW DISPATCH WAS NOTIFIED AND MOD -- THE LAX CHIEF ON DUTY WAS ALSO NOTIFIED. THE NMAC RPT WAS COMPLETED WITH SNA TWR MOD WHO INFORMED ME OF THE ACFT TAIL NUMBER.

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.