Near midair collision air carrier and intruder aircraft giv near gmn.

Attributes
ACN	436708
Time
Date	199904
Day	Tue
Local Time Of Day	1201 To 1800
Place
State Reference	CA
Altitude	msl bound lower : 11000 msl bound upper : 11200
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : sct.tracon
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	climbout : vacating altitude
Route In Use	departure : on vectors departure sid : gmn
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : sct.tracon
Operator	general aviation : corporate
Make Model Name	Gulfstream IV
Operating Under FAR Part	Part 91
Flight Phase	descent : intermediate altitude
Route In Use	arrival : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 15000 flight time type : 10000
ASRS Report	436708
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
Events
Anomaly	conflict : nmac non adherence : required legal separation non adherence : far non adherence : clearance non adherence other
Independent Detector	atc equipment : conflict alert atc equipment other atc equipment : radar other flight crewa
Resolutory Action	controller : issued new clearance flight crew : took precautionary avoidance action flight crew : took evasive action
Miss Distance	horizontal : 200 vertical : 200
Supplementary
Problem Areas	ATC Human Performance Flight Crew Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Departed lax to smf and on climb out and talking to socal we were given a heading for the gorman departure. Socal cleared us to 15000 ft and on the climb out we were told to stop at 12000 ft for a G4 that was descending VFR. We were solid IFR and light rain at the time. Socal noticed he was still descending and told us to stop our climb immediately and we stopped around 11100 ft to 11200 ft. The G4 was still descending on top of us. At that time we got an RA to climb at 2000 FPM and started to climb. After we cleared him we asked socal about him and how close we were and we were told about 200 ft and on their screen we merged. As our TCASII showed a merge plot it was still showing a climb. An asi inspector was giving us an en route and said that was the closest he's ever been.

Original NASA ASRS Text

Title: NMAC ACR AND INTRUDER ACFT GIV NEAR GMN.

Narrative: DEPARTED LAX TO SMF AND ON CLBOUT AND TALKING TO SOCAL WE WERE GIVEN A HDG FOR THE GORMAN DEP. SOCAL CLRED US TO 15000 FT AND ON THE CLBOUT WE WERE TOLD TO STOP AT 12000 FT FOR A G4 THAT WAS DSNDING VFR. WE WERE SOLID IFR AND LIGHT RAIN AT THE TIME. SOCAL NOTICED HE WAS STILL DSNDING AND TOLD US TO STOP OUR CLB IMMEDIATELY AND WE STOPPED AROUND 11100 FT TO 11200 FT. THE G4 WAS STILL DSNDING ON TOP OF US. AT THAT TIME WE GOT AN RA TO CLB AT 2000 FPM AND STARTED TO CLB. AFTER WE CLRED HIM WE ASKED SOCAL ABOUT HIM AND HOW CLOSE WE WERE AND WE WERE TOLD ABOUT 200 FT AND ON THEIR SCREEN WE MERGED. AS OUR TCASII SHOWED A MERGE PLOT IT WAS STILL SHOWING A CLB. AN ASI INSPECTOR WAS GIVING US AN ENRTE AND SAID THAT WAS THE CLOSEST HE'S EVER BEEN.

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.