During a diversion; A300 encounters TCAS RA with two aircraft at 10000 ft MSL.

Attributes
ACN	736951
Time
Date	200704
Place
Locale Reference	navaid : pmd.vortac
State Reference	CA
Altitude	msl single value : 10000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : d10.tracon
Operator	common carrier : air carrier
Make Model Name	A300
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Route In Use	arrival star : lynnx 8
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : e10.tracon
Operator	Other
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 250 flight time total : 9000 flight time type : 300
ASRS Report	736951
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	conflict : airborne critical
Independent Detector	aircraft equipment : tcas
Resolutory Action	flight crew : took evasive action
Miss Distance	horizontal : 6000 vertical : 200
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance Airspace Structure
Primary Problem	Airspace Structure

Narrative:

Operating airbus A300 in communication with joshua approach control; IFR flight lgb; then diverted to bur per company instructions. Level at 10000 ft and indicated airspeed of 310 KIAS; as requested by joshua approach control; to keep speed up for other arriving aircraft behind us. Suddenly; our TCAS showed targets at 1 O'clock position and 2 O'clock position as we passed by the pmd VOR on the lynnx 8 arrival to bur. One of the targets was higher above us; the other was showing -200 below our aircraft. At that time; joshua approach control pointed out the same traffic and after a pause; directed to fly 10 degrees left for separation from that same traffic; there was no communication from that traffic in conflict with our flight. TCAS symbology showed intruder status of the conflict aircraft and then we received aural and instrument TCAS warnings to 'climb; climb; now.' I disengaged the autoplt and autothrottles per company practice; and executed climb maneuver away from the intruder; then received an almost immediate instruction to 'descend; monitor vertical speed.' the intruder aircraft passed within 1 mi of our aircraft. We had visual with that aircraft passing on our right side; below us. We reported our deviation with joshua approach control; the entire maneuver started at 10000 ft MSL and was over by 10400 ft MSL. TCAS was excellent in getting us out of the situation.

Original NASA ASRS Text

Title: DURING A DIVERSION; A300 ENCOUNTERS TCAS RA WITH TWO ACFT AT 10000 FT MSL.

Narrative: OPERATING AIRBUS A300 IN COM WITH JOSHUA APCH CTL; IFR FLT LGB; THEN DIVERTED TO BUR PER COMPANY INSTRUCTIONS. LEVEL AT 10000 FT AND INDICATED AIRSPD OF 310 KIAS; AS REQUESTED BY JOSHUA APCH CTL; TO KEEP SPD UP FOR OTHER ARRIVING ACFT BEHIND US. SUDDENLY; OUR TCAS SHOWED TARGETS AT 1 O'CLOCK POS AND 2 O'CLOCK POS AS WE PASSED BY THE PMD VOR ON THE LYNNX 8 ARR TO BUR. ONE OF THE TARGETS WAS HIGHER ABOVE US; THE OTHER WAS SHOWING -200 BELOW OUR ACFT. AT THAT TIME; JOSHUA APCH CTL POINTED OUT THE SAME TFC AND AFTER A PAUSE; DIRECTED TO FLY 10 DEGS L FOR SEPARATION FROM THAT SAME TFC; THERE WAS NO COM FROM THAT TFC IN CONFLICT WITH OUR FLT. TCAS SYMBOLOGY SHOWED INTRUDER STATUS OF THE CONFLICT ACFT AND THEN WE RECEIVED AURAL AND INST TCAS WARNINGS TO 'CLB; CLB; NOW.' I DISENGAGED THE AUTOPLT AND AUTOTHROTTLES PER COMPANY PRACTICE; AND EXECUTED CLB MANEUVER AWAY FROM THE INTRUDER; THEN RECEIVED AN ALMOST IMMEDIATE INSTRUCTION TO 'DSND; MONITOR VERT SPD.' THE INTRUDER ACFT PASSED WITHIN 1 MI OF OUR ACFT. WE HAD VISUAL WITH THAT ACFT PASSING ON OUR R SIDE; BELOW US. WE RPTED OUR DEV WITH JOSHUA APCH CTL; THE ENTIRE MANEUVER STARTED AT 10000 FT MSL AND WAS OVER BY 10400 FT MSL. TCAS WAS EXCELLENT IN GETTING US OUT OF THE SITUATION.

Data retrieved from NASA's ASRS site as of January 2009 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.