Close proximity air carrier-medium large transport mdt east of sna.

Attributes
ACN	164116
Time
Date	199011
Day	Wed
Local Time Of Day	0001 To 0600
Place
Locale Reference	atc facility : san airport : sna
State Reference	CA
Altitude	msl bound lower : 8000 msl bound upper : 8000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : sna
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
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Medium Transport, Low Wing, 2 Turboprop Eng
Flight Phase	cruise other
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 210 flight time total : 3500 flight time type : 400
ASRS Report	164116
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : nmac
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Consequence	Other
Miss Distance	horizontal : 50 vertical : 50
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

On takeoff from sna runway 01L, coast departure control called traffic at 2 O'clock. We did not acknowledged traffic, however the conflicting traffic (an mdt) reported over aircraft in sight and was instructed by coast approach to maintain visibility sep. We were at 3000' MSL on an 010 degree heading. Coast then gave us a vector to 180 degrees, climb and maintain 9000' MSL. Our aircraft was climbing at approximately 5000 FPM. At 8000' MSL our medium large transport passed within 50' (estimated) of the aircraft. The mdt passed right to left on a heading of 140 degrees. A near miss was reported to coast approach. I believe the excessive climb rate of the medium large transport restr the ability for the air crew to visually acquire traffic and make the appropriate avoidance maneuver. Also, the aircraft was utilizing the FMC and autoplt, which also increases task loading in the terminal environment, especially when associated with such extreme rates of climb. The incident was properly reported to both company and FAA personnel. Additionally, when the FMC is flying the aircraft under the excessive rate of climb, pilots have a tendency to devote the majority of their attention to monitoring the FMC vs traffic avoidance.

Original NASA ASRS Text

Title: CLOSE PROX ACR-MLG MDT EAST OF SNA.

Narrative: ON TKOF FROM SNA RWY 01L, COAST DEP CTL CALLED TFC AT 2 O'CLOCK. WE DID NOT ACKNOWLEDGED TFC, HOWEVER THE CONFLICTING TFC (AN MDT) RPTED OVER ACFT IN SIGHT AND WAS INSTRUCTED BY COAST APCH TO MAINTAIN VIS SEP. WE WERE AT 3000' MSL ON AN 010 DEG HDG. COAST THEN GAVE US A VECTOR TO 180 DEGS, CLB AND MAINTAIN 9000' MSL. OUR ACFT WAS CLBING AT APPROX 5000 FPM. AT 8000' MSL OUR MLG PASSED WITHIN 50' (ESTIMATED) OF THE ACFT. THE MDT PASSED RIGHT TO LEFT ON A HDG OF 140 DEGS. A NEAR MISS WAS RPTED TO COAST APCH. I BELIEVE THE EXCESSIVE CLB RATE OF THE MLG RESTR THE ABILITY FOR THE AIR CREW TO VISUALLY ACQUIRE TFC AND MAKE THE APPROPRIATE AVOIDANCE MANEUVER. ALSO, THE ACFT WAS UTILIZING THE FMC AND AUTOPLT, WHICH ALSO INCREASES TASK LOADING IN THE TERMINAL ENVIRONMENT, ESPECIALLY WHEN ASSOCIATED WITH SUCH EXTREME RATES OF CLB. THE INCIDENT WAS PROPERLY RPTED TO BOTH COMPANY AND FAA PERSONNEL. ADDITIONALLY, WHEN THE FMC IS FLYING THE ACFT UNDER THE EXCESSIVE RATE OF CLB, PLTS HAVE A TENDENCY TO DEVOTE THE MAJORITY OF THEIR ATTN TO MONITORING THE FMC VS TFC AVOIDANCE.

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.