Air carrier X on visual approach to parallel runways had near midair collision. Less than standard s...

Attributes
ACN	247240
Time
Date	199307
Day	Sun
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : lax
State Reference	CA
Altitude	msl bound lower : 6000 msl bound upper : 6000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : lax
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	descent : approach
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
ASRS Report	247240
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 6200 flight time type : 900
ASRS Report	247419
Events
Anomaly	conflict : nmac non adherence : required legal separation non adherence : clearance non adherence : published procedure
Independent Detector	other controllera other flight crewa
Resolutory Action	flight crew : took evasive action other
Consequence	faa : assigned or threatened penalties faa : investigated
Miss Distance	horizontal : 300 vertical : 300
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

After relieving an fpl and developmental off position, I began to issue traffic to air carrier X to see air carrier Y established on the runway 25R ILS final. After air carrier X reported air carrier Y in sight I instructed him to follow and cleared visual approach runway 25L. I told air carrier Y that traffic would pull up along his side for runway 25L. Within 20 mi of the airport, air carrier X still had not turned to follow nor descended. I instructed air carrier X to turn right heading 350 degrees to follow his traffic. While I was working other aircraft, air carrier X flew through final into flight path of air carrier Z heavy, who was descending through 6000 on the runway 24L ILS. I issued a TA. Air carrier Z and air carrier X passed above him. After that episode, I worked to resequence air carrier X. There was no problem or incident as far as everyone is concerned, but this truly scared me, and just in case someone wants to know, I wanted to let you guys know. Supplemental information from acn 247419: approaching lahab intersection, ontario approach switched us to lax approach control who was obviously extremely busy. Finally, after the fourth attempt, they answered us after I had asked if they had any instructions for us after lahab. They said that we should expect to follow a large aircraft that was behind us and to our right. It was at least 8 mi behind us. The controller asked us if we had the aircraft in sight, and we responded that we did have the aircraft in sight. The controller said to pull up beside him but not to pass him. He would be going to 25R and we were cleared for a visual to 25L. I told the controller that we would not be able to stay behind him since he was still at a considerable distance behind us. At this point a different controller came on and instructed is to fly heading 360. We were still at 6000 ft MSL. When we were established on this heading, the PF in the right seat called conflicting traffic inbound to lax at 2 O'clock, slightly below us. We immediately climbed to avoid colliding with the other aircraft. We were subsequently vectored and resequenced behind an medium large transport.

Original NASA ASRS Text

Title: ACR X ON VISUAL APCH TO PARALLEL RWYS HAD NMAC. LTSS FROM ACR Z. SYS ERROR. EVASIVE ACTION TAKEN.

Narrative: AFTER RELIEVING AN FPL AND DEVELOPMENTAL OFF POS, I BEGAN TO ISSUE TFC TO ACR X TO SEE ACR Y ESTABLISHED ON THE RWY 25R ILS FINAL. AFTER ACR X RPTED ACR Y IN SIGHT I INSTRUCTED HIM TO FOLLOW AND CLRED VISUAL APCH RWY 25L. I TOLD ACR Y THAT TFC WOULD PULL UP ALONG HIS SIDE FOR RWY 25L. WITHIN 20 MI OF THE ARPT, ACR X STILL HAD NOT TURNED TO FOLLOW NOR DSNDED. I INSTRUCTED ACR X TO TURN R HDG 350 DEGS TO FOLLOW HIS TFC. WHILE I WAS WORKING OTHER ACFT, ACR X FLEW THROUGH FINAL INTO FLT PATH OF ACR Z HVY, WHO WAS DSNDING THROUGH 6000 ON THE RWY 24L ILS. I ISSUED A TA. ACR Z AND ACR X PASSED ABOVE HIM. AFTER THAT EPISODE, I WORKED TO RESEQUENCE ACR X. THERE WAS NO PROB OR INCIDENT AS FAR AS EVERYONE IS CONCERNED, BUT THIS TRULY SCARED ME, AND JUST IN CASE SOMEONE WANTS TO KNOW, I WANTED TO LET YOU GUYS KNOW. SUPPLEMENTAL INFO FROM ACN 247419: APCHING LAHAB INTXN, ONTARIO APCH SWITCHED US TO LAX APCH CTL WHO WAS OBVIOUSLY EXTREMELY BUSY. FINALLY, AFTER THE FOURTH ATTEMPT, THEY ANSWERED US AFTER I HAD ASKED IF THEY HAD ANY INSTRUCTIONS FOR US AFTER LAHAB. THEY SAID THAT WE SHOULD EXPECT TO FOLLOW A LARGE ACFT THAT WAS BEHIND US AND TO OUR R. IT WAS AT LEAST 8 MI BEHIND US. THE CTLR ASKED US IF WE HAD THE ACFT IN SIGHT, AND WE RESPONDED THAT WE DID HAVE THE ACFT IN SIGHT. THE CTLR SAID TO PULL UP BESIDE HIM BUT NOT TO PASS HIM. HE WOULD BE GOING TO 25R AND WE WERE CLRED FOR A VISUAL TO 25L. I TOLD THE CTLR THAT WE WOULD NOT BE ABLE TO STAY BEHIND HIM SINCE HE WAS STILL AT A CONSIDERABLE DISTANCE BEHIND US. AT THIS POINT A DIFFERENT CTLR CAME ON AND INSTRUCTED IS TO FLY HDG 360. WE WERE STILL AT 6000 FT MSL. WHEN WE WERE ESTABLISHED ON THIS HDG, THE PF IN THE R SEAT CALLED CONFLICTING TFC INBOUND TO LAX AT 2 O'CLOCK, SLIGHTLY BELOW US. WE IMMEDIATELY CLBED TO AVOID COLLIDING WITH THE OTHER ACFT. WE WERE SUBSEQUENTLY VECTORED AND RESEQUENCED BEHIND AN MLG.

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.

Air carrier X on visual approach to parallel runways had near midair collision. Less than standard separation from air carrier Z. System error. Evasive action taken.