<< >> NASA ASRS Report 378211, August 1997

An air carrier B757 on STAR arrival encountered popup traffic. Approach controller cleared aircraft for a left turn, but flight crew thought a right turn was safer. That turn put them in another sector's control.

Attributes
ACN	378211
Time
Date	199708
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : sna
State Reference	CA
Altitude	msl bound lower : 4000 msl bound upper : 5000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : lax
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	cruise other descent other
Route In Use	arrival other arrival star : star enroute airway : lax
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	other : unknown
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	378211
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	conflict : airborne less severe non adherence : clearance other anomaly other other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance flight crew : took evasive action other
Consequence	Other
Supplementary
Air Traffic Incident	other

Narrative:

Flying eastside arrival, given kayoh at 7000 ft, 190 degrees. Frequency change to 121.3. They asked if we wanted visual, we said yes and 250 degree heading was given initially. Then heading 310 degrees with descent from 5000 ft to 4000 ft. Controller called popup traffic, altitude unknown, at 12 O'clock. Then he said I have an altitude on the traffic, level off immediately. We did, saw the traffic and turned right to evade. Controller wanted a turn left, but in our judgement, right was better. When clear, we turned back to the left and asked for a heading. No response for 3 calls. Controller finally came up and said that he had been coordination with another sector we had flown into during our turn. We filed this due to evasive action required and necessity for controller to coordination with another sector.

Related reports:

• An air carrier B727 flight crew reports that they encountere...
• C172 pilot had the approach controller declare an emergency ...
• Controller report of air taxi flight which drifted southwest...
• During vectors for a river visual approach to dca runway 18,...
• A319 crew encountered an approach controller with such a hea...

	Enter your search terms Submit search form
	Web www.37000feet.com

Original NASA ASRS Text

Title: AN ACR B757 ON STAR ARR ENCOUNTERED POPUP TFC. APCH CTLR CLRED ACFT FOR A L TURN, BUT FLC THOUGHT A R TURN WAS SAFER. THAT TURN PUT THEM IN ANOTHER SECTOR'S CTL.

Narrative: FLYING EASTSIDE ARR, GIVEN KAYOH AT 7000 FT, 190 DEGS. FREQ CHANGE TO 121.3. THEY ASKED IF WE WANTED VISUAL, WE SAID YES AND 250 DEG HDG WAS GIVEN INITIALLY. THEN HDG 310 DEGS WITH DSCNT FROM 5000 FT TO 4000 FT. CTLR CALLED POPUP TFC, ALT UNKNOWN, AT 12 O'CLOCK. THEN HE SAID I HAVE AN ALT ON THE TFC, LEVEL OFF IMMEDIATELY. WE DID, SAW THE TFC AND TURNED R TO EVADE. CTLR WANTED A TURN L, BUT IN OUR JUDGEMENT, R WAS BETTER. WHEN CLR, WE TURNED BACK TO THE L AND ASKED FOR A HDG. NO RESPONSE FOR 3 CALLS. CTLR FINALLY CAME UP AND SAID THAT HE HAD BEEN COORD WITH ANOTHER SECTOR WE HAD FLOWN INTO DURING OUR TURN. WE FILED THIS DUE TO EVASIVE ACTION REQUIRED AND NECESSITY FOR CTLR TO COORD WITH ANOTHER SECTOR.

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.