Near midair collision, TCA penetration.

Attributes
ACN	92143
Time
Date	198808
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : lax
State Reference	CA
Altitude	msl bound lower : 3000 msl bound upper : 3000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : lax
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	descent : approach
Route In Use	approach : straight in
Flight Plan	IFR
Aircraft 2
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 250 flight time total : 5500 flight time type : 2500
ASRS Report	92143
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : nmac non adherence : far
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Miss Distance	horizontal : 1500 vertical : 100
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Established on localizer and G/south of ILS runway 25L approach. At 3000' AGL and approximately 10 DME a light aircraft was sighted passing off our right wing approximately 100' below us going the opp direction. The aircraft was on a path which placed it between aircraft conducting parallel ILS approachs to lax. It passed within 1/2 mi of my aircraft. Its direction of flight was eastbound--opp the direction of the approachs in progress. Approach control was immediately notified by me. The aircraft appeared to be a light twin. Approach control had not advised us of the traffic. The traffic was sighted by the F/east initially. The aircraft was within the confines of the lax TCA, but was not in contact with the controling facility. This type of incident is all too common and the number of near misses is grossly under reported. The TCA should be extended to the surface to avoid confusion and penalties for violating it should be very severe.

Original NASA ASRS Text

Title: NMAC, TCA PENETRATION.

Narrative: ESTABLISHED ON LOC AND G/S OF ILS RWY 25L APCH. AT 3000' AGL AND APPROX 10 DME A LIGHT ACFT WAS SIGHTED PASSING OFF OUR RIGHT WING APPROX 100' BELOW US GOING THE OPP DIRECTION. THE ACFT WAS ON A PATH WHICH PLACED IT BTWN ACFT CONDUCTING PARALLEL ILS APCHS TO LAX. IT PASSED WITHIN 1/2 MI OF MY ACFT. ITS DIRECTION OF FLT WAS EBND--OPP THE DIRECTION OF THE APCHS IN PROGRESS. APCH CTL WAS IMMEDIATELY NOTIFIED BY ME. THE ACFT APPEARED TO BE A LIGHT TWIN. APCH CTL HAD NOT ADVISED US OF THE TFC. THE TFC WAS SIGHTED BY THE F/E INITIALLY. THE ACFT WAS WITHIN THE CONFINES OF THE LAX TCA, BUT WAS NOT IN CONTACT WITH THE CTLING FAC. THIS TYPE OF INCIDENT IS ALL TOO COMMON AND THE NUMBER OF NEAR MISSES IS GROSSLY UNDER RPTED. THE TCA SHOULD BE EXTENDED TO THE SURFACE TO AVOID CONFUSION AND PENALTIES FOR VIOLATING IT SHOULD BE VERY SEVERE.

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.