Commuter aircraft experiences traffic conflict shortly after encountering VMC while on instrument ap...

Attributes
ACN	113841
Time
Date	198906
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : lgb
State Reference	CA
Altitude	msl bound lower : 600 msl bound upper : 800
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tower : lgb
Operator	common carrier : air taxi
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Navigation In Use	Other
Flight Phase	descent : approach
Route In Use	approach : straight in
Flight Plan	IFR
Aircraft 2
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	descent : approach landing other other
Person 1
Affiliation	company : air taxi
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 6000 flight time type : 1000
ASRS Report	113841
Person 2
Affiliation	company : air taxi
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	conflict : airborne less severe
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	unspecified : 800
Supplementary
Primary Problem	Ambiguous
Air Traffic Incident	other

Narrative:

The WX (ATIS) at lgb was calling clear and 8 mi. As we flew over we could see the marine layer very close to the approach end of runway 30. When cleared for the runway 30 ILS, we entered IMC at 1600' MSL and broke out at 1100' MSL. At this time we were about 3 mi final. Just before breaking out tower advised us of traffic at 12 O'clock, opposite direction and 1 mi, altitude unknown. Right after breaking out, we were advised that traffic was no longer a factor. Passing through about 800' MSL, lgb tower called an small aircraft Y in the pattern for runway 25L, and told him to 'climb to 800' immediately, traffic on final for 30'. I looked low on downwind (25L) and sure enough there was an small aircraft climbing from about 600' MSL. His climb put him clear of us so I continued the approach (deliberately going slightly low on the glide path). At the time I noticed the small aircraft and our aircraft were on converging paths. At no time did the tower say anything to us about the small aircraft.

Original NASA ASRS Text

Title: COMMUTER ACFT EXPERIENCES TRAFFIC CONFLICT SHORTLY AFTER ENCOUNTERING VMC WHILE ON INSTRUMENT APCH.

Narrative: THE WX (ATIS) AT LGB WAS CALLING CLEAR AND 8 MI. AS WE FLEW OVER WE COULD SEE THE MARINE LAYER VERY CLOSE TO THE APCH END OF RWY 30. WHEN CLRED FOR THE RWY 30 ILS, WE ENTERED IMC AT 1600' MSL AND BROKE OUT AT 1100' MSL. AT THIS TIME WE WERE ABOUT 3 MI FINAL. JUST BEFORE BREAKING OUT TWR ADVISED US OF TFC AT 12 O'CLOCK, OPPOSITE DIRECTION AND 1 MI, ALT UNKNOWN. RIGHT AFTER BREAKING OUT, WE WERE ADVISED THAT TFC WAS NO LONGER A FACTOR. PASSING THROUGH ABOUT 800' MSL, LGB TWR CALLED AN SMA Y IN THE PATTERN FOR RWY 25L, AND TOLD HIM TO 'CLIMB TO 800' IMMEDIATELY, TFC ON FINAL FOR 30'. I LOOKED LOW ON DOWNWIND (25L) AND SURE ENOUGH THERE WAS AN SMA CLIMBING FROM ABOUT 600' MSL. HIS CLIMB PUT HIM CLEAR OF US SO I CONTINUED THE APCH (DELIBERATELY GOING SLIGHTLY LOW ON THE GLIDE PATH). AT THE TIME I NOTICED THE SMA AND OUR ACFT WERE ON CONVERGING PATHS. AT NO TIME DID THE TWR SAY ANYTHING TO US ABOUT THE SMA.

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.

Commuter aircraft experiences traffic conflict shortly after encountering VMC while on instrument approach.