Near midair collision with small transport while on visual approach lgb.

Attributes
ACN	81825
Time
Date	198802
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : lgb
State Reference	CA
Altitude	msl bound lower : 2700 msl bound upper : 3000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : lgb
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Fixed Gear
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	None
Aircraft 2
Make Model Name	Small Transport
Flight Phase	climbout : intermediate altitude
Flight Plan	VFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : atp
Experience	flight time last 90 days : 100 flight time total : 13000 flight time type : 4000
ASRS Report	81825
Person 2
Function	flight crew : single pilot
Events
Anomaly	conflict : nmac
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Miss Distance	horizontal : 300 vertical : 0
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

I had contacted lgb tower approximately 10 mi east and received instructions to report the 605 freeway east of the airport at or above 2000'. Flying on a heading of 250 degrees, lined up with runway 25L, I had xed los alamitos airport at 3000' to avoid their air traffic area and had just throttled back to reduce speed from 150 mph to 100 mph to begin descent and lower landing gear (gear down speed is 100 mph). At approximately 2700' in my descent I was startled to see a twin cross from my left to right approximately 300' in front of me at the same altitude. It appeared that he was climbing at this time. I observed the aircraft fly n-erly until approximately 5 mi north of lgb, and then turn wbound. By this time I had xed the 605 freeway and received clearance to land by the lgb tower. The tower at no time seemed to be aware of the aircraft in their air traffic area. Due to radio congestion, I did not advise the tower of the conflict. I do not feel the other aircraft was ever aware of my aircraft. It was not a life or death matter. My attention was directed towards the landing approach and scan had been limited to this area.

Original NASA ASRS Text

Title: NMAC WITH SMT WHILE ON VISUAL APCH LGB.

Narrative: I HAD CONTACTED LGB TWR APPROX 10 MI EAST AND RECEIVED INSTRUCTIONS TO RPT THE 605 FREEWAY E OF THE ARPT AT OR ABOVE 2000'. FLYING ON A HDG OF 250 DEGS, LINED UP WITH RWY 25L, I HAD XED LOS ALAMITOS ARPT AT 3000' TO AVOID THEIR ATA AND HAD JUST THROTTLED BACK TO REDUCE SPD FROM 150 MPH TO 100 MPH TO BEGIN DSCNT AND LOWER LNDG GEAR (GEAR DOWN SPD IS 100 MPH). AT APPROX 2700' IN MY DSCNT I WAS STARTLED TO SEE A TWIN CROSS FROM MY LEFT TO RIGHT APPROX 300' IN FRONT OF ME AT THE SAME ALT. IT APPEARED THAT HE WAS CLBING AT THIS TIME. I OBSERVED THE ACFT FLY N-ERLY UNTIL APPROX 5 MI N OF LGB, AND THEN TURN WBOUND. BY THIS TIME I HAD XED THE 605 FREEWAY AND RECEIVED CLRNC TO LAND BY THE LGB TWR. THE TWR AT NO TIME SEEMED TO BE AWARE OF THE ACFT IN THEIR ATA. DUE TO RADIO CONGESTION, I DID NOT ADVISE THE TWR OF THE CONFLICT. I DO NOT FEEL THE OTHER ACFT WAS EVER AWARE OF MY ACFT. IT WAS NOT A LIFE OR DEATH MATTER. MY ATTN WAS DIRECTED TOWARDS THE LNDG APCH AND SCAN HAD BEEN LIMITED TO THIS AREA.

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.