Near midair collision between arriving medium large transport and arriving light transport.

Attributes
ACN	122525
Time
Date	198908
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : lax
State Reference	CA
Altitude	msl bound lower : 3000 msl bound upper : 3000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent : approach
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : atp pilot : instrument
Experience	flight time last 90 days : 240 flight time total : 15000
ASRS Report	122525
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	conflict : nmac non adherence : clearance
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 600 vertical : 0
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Air carrier xx dove from above and perhaps 300' in front of us on the approach to runway 25L at lax. He had been cleared to follow us visually for runway 25L. We were cleared for ILS runway 25L expect sidestep to runway 25R. At no time did we sidestep for runway 25R--instead we took evasive action to the right to avoid a midair collision with the light transport. Also, the light transport started to miss his approach, then later continued for runway 25L. He seemed confused and perhaps did not have either us or the field in sight. Approach control informed me that the light transport did not follow their instructions and similar incidents have happened recently with them and other air carrier's.

Original NASA ASRS Text

Title: NMAC BETWEEN ARRIVING MLG AND ARRIVING LTT.

Narrative: ACR XX DOVE FROM ABOVE AND PERHAPS 300' IN FRONT OF US ON THE APCH TO RWY 25L AT LAX. HE HAD BEEN CLRED TO FOLLOW US VISUALLY FOR RWY 25L. WE WERE CLRED FOR ILS RWY 25L EXPECT SIDESTEP TO RWY 25R. AT NO TIME DID WE SIDESTEP FOR RWY 25R--INSTEAD WE TOOK EVASIVE ACTION TO THE RIGHT TO AVOID A MIDAIR COLLISION WITH THE LTT. ALSO, THE LTT STARTED TO MISS HIS APCH, THEN LATER CONTINUED FOR RWY 25L. HE SEEMED CONFUSED AND PERHAPS DID NOT HAVE EITHER US OR THE FIELD IN SIGHT. APCH CTL INFORMED ME THAT THE LTT DID NOT FOLLOW THEIR INSTRUCTIONS AND SIMILAR INCIDENTS HAVE HAPPENED RECENTLY WITH THEM AND OTHER ACR'S.

Data retrieved from NASA's ASRS site as of August 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.