Air carrier X same altitude assigned as air carrier Y had less than standard separation from air carrier Y. Air carrier X TCASII RA climb. Evasive action taken. System error.

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Attributes
ACN	213406
Time
Date	199206
Day	Fri
Local Time Of Day	0001 To 0600
Place
Locale Reference	atc facility : lax
State Reference	CA
Altitude	msl bound lower : 33000 msl bound upper : 33000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zoa artcc : zla tracon : nqx
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 3 Turbojet Eng
Navigation In Use	Other
Flight Phase	cruise other
Route In Use	enroute : direct
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 4 Turbojet Eng
Navigation In Use	Other
Flight Phase	cruise other
Route In Use	enroute : direct
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller non radar : 3 controller radar : 3
ASRS Report	213406
Person 2
Affiliation	government : faa
Function	controller : non radar
Qualification	controller : non radar
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation non adherence : published procedure
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	faa : investigated
Miss Distance	horizontal : 18000 vertical : 700
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error Intra Facility Coordination Failure

Narrative:

Air carrier X inbound. Air carrier Y outbound. Traffic arrival over same fix at same time at same altitude in opposite directions. Causal factor were, no flight progress strip deliveries to bay. No inbound estimate passed to ZLA on air carrier X like we pass to the outgoing center (oakland oceanic). This situation would have been avoided had we received an updated estimate! Callback conversation with reporter revealed the following information. Reporter stated aircraft were a 4 engine widebody transport outbound and a 3 engine widebody transport inbound. Inbound aircraft had been on frequency for 15 mins prior to loss of separation. Reporter did not request a flight progress strip. Air carrier inbound received TCASII RA climb. Reporter admitted complacency and socializing because of light traffic. Reporter stated he forgot about air carrier X after initial contact until air carrier X said they were responding to TCASII RA.

Original NASA ASRS Text

Title: ACR X SAME ALT ASSIGNED AS ACR Y HAD LTSS FROM ACR Y. ACR X TCASII RA CLB. EVASIVE ACTION TAKEN. SYS ERROR.

Narrative: ACR X INBOUND. ACR Y OUTBOUND. TFC ARR OVER SAME FIX AT SAME TIME AT SAME ALT IN OPPOSITE DIRECTIONS. CAUSAL FACTOR WERE, NO FLT PROGRESS STRIP DELIVERIES TO BAY. NO INBOUND ESTIMATE PASSED TO ZLA ON ACR X LIKE WE PASS TO THE OUTGOING CTR (OAKLAND OCEANIC). THIS SITUATION WOULD HAVE BEEN AVOIDED HAD WE RECEIVED AN UPDATED ESTIMATE! CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO. RPTR STATED ACFT WERE A 4 ENG WDB OUTBOUND AND A 3 ENG WDB INBOUND. INBOUND ACFT HAD BEEN ON FREQ FOR 15 MINS PRIOR TO LOSS OF SEPARATION. RPTR DID NOT REQUEST A FLT PROGRESS STRIP. ACR INBOUND RECEIVED TCASII RA CLB. RPTR ADMITTED COMPLACENCY AND SOCIALIZING BECAUSE OF LIGHT TFC. RPTR STATED HE FORGOT ABOUT ACR X AFTER INITIAL CONTACT UNTIL ACR X SAID THEY WERE RESPONDING TO TCASII RA.

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.