ATC controller at lax tower reports that an MD80 on a visual approach to runway 24R overshot the final and intercepted and conflicted with a B747 on the ILS approach to runway 25L. Controller intervened to prevent an alleged collision.

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Attributes
ACN	352993
Time
Date	199611
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : lax
State Reference	CA
Altitude	msl bound lower : 3000 msl bound upper : 3000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : lax tower : apa
Operator	common carrier : air carrier
Make Model Name	B747 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	descent : approach landing other
Route In Use	approach : straight in arrival other
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent : approach landing other
Route In Use	approach : visual arrival other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : local
Qualification	controller : radar
Experience	controller radar : 10 flight time total : 90
ASRS Report	352993
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	non adherence : far non adherence : published procedure non adherence : clearance other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	Other
Miss Distance	horizontal : 0 vertical : 300
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

The MD80 was cleared for a visual approach to runway 24R from the north downwind after being instructed to fly heading 160 degrees (base leg). The B747 was established straight in and instructed to contact the tower at the marker. Air carrier #1 was within 2 mi of the marker when air carrier #2 (MD80) overshot the runway 24R final and ended up on the runway 25L final in front of and at the same altitude as air carrier #1 (B747). I issued a TA to air carrier #1 who subsequently reported the MD80 in sight. The primary targets of the 2 aircraft merged and the mode C indicated 3000 ft on both aircraft. This overshoot situation, which occurs daily, could be prevented if the aircraft downwind north were issued a heading that is within 30 degrees of the extended centerline for the approach cleared. Additionally, if an aircraft were slowed to a manageable speed.

Original NASA ASRS Text

Title: ATC CTLR AT LAX TWR RPTS THAT AN MD80 ON A VISUAL APCH TO RWY 24R OVERSHOT THE FINAL AND INTERCEPTED AND CONFLICTED WITH A B747 ON THE ILS APCH TO RWY 25L. CTLR INTERVENED TO PREVENT AN ALLEGED COLLISION.

Narrative: THE MD80 WAS CLRED FOR A VISUAL APCH TO RWY 24R FROM THE N DOWNWIND AFTER BEING INSTRUCTED TO FLY HDG 160 DEGS (BASE LEG). THE B747 WAS ESTABLISHED STRAIGHT IN AND INSTRUCTED TO CONTACT THE TWR AT THE MARKER. ACR #1 WAS WITHIN 2 MI OF THE MARKER WHEN ACR #2 (MD80) OVERSHOT THE RWY 24R FINAL AND ENDED UP ON THE RWY 25L FINAL IN FRONT OF AND AT THE SAME ALT AS ACR #1 (B747). I ISSUED A TA TO ACR #1 WHO SUBSEQUENTLY RPTED THE MD80 IN SIGHT. THE PRIMARY TARGETS OF THE 2 ACFT MERGED AND THE MODE C INDICATED 3000 FT ON BOTH ACFT. THIS OVERSHOOT SIT, WHICH OCCURS DAILY, COULD BE PREVENTED IF THE ACFT DOWNWIND N WERE ISSUED A HDG THAT IS WITHIN 30 DEGS OF THE EXTENDED CTRLINE FOR THE APCH CLRED. ADDITIONALLY, IF AN ACFT WERE SLOWED TO A MANAGEABLE SPD.

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.