ZOA controller described conflict when two approach control facility sectors attempted to handoff conflicting aircraft; turns issued saved separation.

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Attributes
ACN	781304
Time
Date	200804
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : zoa.artcc
State Reference	CA
Altitude	msl single value : 23000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zoa.artcc
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : vacating altitude
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zoa.artcc
Operator	common carrier : air carrier
Make Model Name	A319
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller limited radar : 6 controller radar : 12 controller time certified in position1 : 12
ASRS Report	781304
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	conflict : airborne less severe
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance

Narrative:

Working sector at FL240 and above. B737 handed off climbing to FL230 and A319 not handed off yet. The B737 had not yet checked in and I observed the other limited data block converging and climbing through FL220. I called in the blind for the B737 and the pilot answered; 'sorry; forgot to check on.' I climbed the aircraft and observed it leaving FL230 with the limited at FL230 approximately 3-4 mi lateral. Many times; 2 different sectors at approach make handoffs and they may not have coordination or have missed the conflict. I observed the A319 target turn sharply to the left.

Original NASA ASRS Text

Title: ZOA CTLR DESCRIBED CONFLICT WHEN TWO APCH CTL FACILITY SECTORS ATTEMPTED TO HDOF CONFLICTING ACFT; TURNS ISSUED SAVED SEPARATION.

Narrative: WORKING SECTOR AT FL240 AND ABOVE. B737 HANDED OFF CLBING TO FL230 AND A319 NOT HANDED OFF YET. THE B737 HAD NOT YET CHKED IN AND I OBSERVED THE OTHER LIMITED DATA BLOCK CONVERGING AND CLBING THROUGH FL220. I CALLED IN THE BLIND FOR THE B737 AND THE PLT ANSWERED; 'SORRY; FORGOT TO CHK ON.' I CLBED THE ACFT AND OBSERVED IT LEAVING FL230 WITH THE LIMITED AT FL230 APPROX 3-4 MI LATERAL. MANY TIMES; 2 DIFFERENT SECTORS AT APCH MAKE HDOFS AND THEY MAY NOT HAVE COORD OR HAVE MISSED THE CONFLICT. I OBSERVED THE A319 TARGET TURN SHARPLY TO THE L.

Data retrieved from NASA's ASRS site as of May 2009 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.