A B727 while on approach climbs to avoid a TCASII target east of ont, ca.

Attributes
ACN	434879
Time
Date	199904
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : sb.ndb
State Reference	CA
Altitude	msl single value : 4200
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : sct.tracon tower : ont.tower
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : 26l other ndb
Flight Phase	descent : approach descent : intermediate altitude
Route In Use	approach : instrument precision
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : multi engine pilot : instrument pilot : commercial
Experience	flight time last 90 days : 150 flight time total : 15000 flight time type : 6000
ASRS Report	434879
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : private pilot : flight engineer pilot : commercial pilot : multi engine pilot : instrument
Experience	flight time last 90 days : 150
ASRS Report	435019
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : nmac
Independent Detector	aircraft equipment : tcas
Resolutory Action	flight crew : returned to original clearance flight crew : took evasive action
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance Aircraft
Primary Problem	Aircraft

Narrative:

On ILS approach to runway 26L at ont, we were cleared to cross petis NDB at or above 4200 ft MSL, cleared ILS, runway 26L approach. At petis, at 4200 ft MSL, the TCASII gave a TA, immediately followed by an RA that said 'climb, climb.' the TCASII showed traffic 100 ft directly below our aircraft. Until that time there was no indication of traffic at that location. We immediately climbed 400 ft and the TCASII gave us 'clear of traffic.' we notified ont tower and he gave us 'cleared to land runway 26L,' but did not acknowledge our TCASII call or address the fact that there was any traffic in our area. The approach and landing were uneventful.

Original NASA ASRS Text

Title: A B727 WHILE ON APCH CLBS TO AVOID A TCASII TARGET E OF ONT, CA.

Narrative: ON ILS APCH TO RWY 26L AT ONT, WE WERE CLRED TO CROSS PETIS NDB AT OR ABOVE 4200 FT MSL, CLRED ILS, RWY 26L APCH. AT PETIS, AT 4200 FT MSL, THE TCASII GAVE A TA, IMMEDIATELY FOLLOWED BY AN RA THAT SAID 'CLB, CLB.' THE TCASII SHOWED TFC 100 FT DIRECTLY BELOW OUR ACFT. UNTIL THAT TIME THERE WAS NO INDICATION OF TFC AT THAT LOCATION. WE IMMEDIATELY CLBED 400 FT AND THE TCASII GAVE US 'CLR OF TFC.' WE NOTIFIED ONT TWR AND HE GAVE US 'CLRED TO LAND RWY 26L,' BUT DID NOT ACKNOWLEDGE OUR TCASII CALL OR ADDRESS THE FACT THAT THERE WAS ANY TFC IN OUR AREA. THE APCH AND LNDG WERE UNEVENTFUL.

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.