Air carrier on approach 30 mi out had TCASII RA. Flight crew complies.

Attributes
ACN	176578
Time
Date	199104
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : ont
State Reference	CA
Altitude	msl bound lower : 8800 msl bound upper : 8800
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other
Flight Phase	descent : approach descent other
Route In Use	arrival other enroute airway : ont
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	cruise other
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 12000 flight time type : 850
ASRS Report	176578
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 6100 flight time type : 1300
ASRS Report	176415
Events
Anomaly	conflict : nmac non adherence : far
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 0 vertical : 200
Supplementary
Primary Problem	Ambiguous

Narrative:

On approach to ontario international we were cleared to petis from bands, crossing bands at 14000' and petis at or above 4200'. We were cleared for the ILS 26L from petis. We had 20 mi to lose 9800' and slow for the approach, due to the normal crossing restriction of 14000' at bands. We were doing 300 KTS at bands because los angeles center normally holds westbound flts to ontario at FL240 until about psp, then we get bands at 14000' 21 mi later all this leaves us high and hot with a high descent rate into a congested traffic area. Passing 8800' 20 mi southeast of petis, we got a pop-up TCAS traffic alert that immediately went to a warning with monitor vertical speed aural warning followed immediately by a climb warning. The captain started a climb at the first sign of the TCAS warning. The TCAS indicated that the traffic passed 200' below. We had told approach about the traffic at the first warning and he said he had no returns; however, 2 mins later he said he had unknown traffic 4 mi behind us showing 8700' not a good situation! Poor VFR visibility, dense VFR traffic and turbojet aircraft plummeting down into the whole mess.

Original NASA ASRS Text

Title: ACR ON APCH 30 MI OUT HAD TCASII RA. FLC COMPLIES.

Narrative: ON APCH TO ONTARIO INTL WE WERE CLRED TO PETIS FROM BANDS, XING BANDS AT 14000' AND PETIS AT OR ABOVE 4200'. WE WERE CLRED FOR THE ILS 26L FROM PETIS. WE HAD 20 MI TO LOSE 9800' AND SLOW FOR THE APCH, DUE TO THE NORMAL XING RESTRICTION OF 14000' AT BANDS. WE WERE DOING 300 KTS AT BANDS BECAUSE LOS ANGELES CTR NORMALLY HOLDS WBND FLTS TO ONTARIO AT FL240 UNTIL ABOUT PSP, THEN WE GET BANDS AT 14000' 21 MI LATER ALL THIS LEAVES US HIGH AND HOT WITH A HIGH DSNT RATE INTO A CONGESTED TFC AREA. PASSING 8800' 20 MI SE OF PETIS, WE GOT A POP-UP TCAS TFC ALERT THAT IMMEDIATELY WENT TO A WARNING WITH MONITOR VERT SPD AURAL WARNING FOLLOWED IMMEDIATELY BY A CLB WARNING. THE CAPT STARTED A CLB AT THE FIRST SIGN OF THE TCAS WARNING. THE TCAS INDICATED THAT THE TFC PASSED 200' BELOW. WE HAD TOLD APCH ABOUT THE TFC AT THE FIRST WARNING AND HE SAID HE HAD NO RETURNS; HOWEVER, 2 MINS LATER HE SAID HE HAD UNKNOWN TFC 4 MI BEHIND US SHOWING 8700' NOT A GOOD SITUATION! POOR VFR VIS, DENSE VFR TFC AND TURBOJET ACFT PLUMMETING DOWN INTO THE WHOLE MESS.

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.