TCASII RA on approach control vector.

Attributes
ACN	174435
Time
Date	199103
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ont
State Reference	CA
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : ont
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	cruise other cruise other descent : approach
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other cruise other descent : approach
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 150 flight time total : 8200 flight time type : 1000
ASRS Report	174435
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : unable
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 7500 vertical : 600
Supplementary
Air Traffic Incident	other

Narrative:

On vectors to runway 26, ont approach reported air carrier medium large transport traffic as we rolled out of turn from final. We reported aircraft in sight. Medium large transport Y began a right turn to final as approach told us to follow traffic to the airport. He was to land 26L. We (medium large transport X) were to land 26R. Almost simultaneously, TCAS announced traffic, followed by an RA, 'monitor vertical speed,' limiting descent to 400 FPM. We continued on north heading until spacing 3-5-4 mi. Turned toward airport. Informed approach of TCAS RA. Believe spacing by approach inadequate. TCAS was distracting during visibility maneuvering. First officer at controls. Aircraft was initially on autoplt. Disengaged and additional 10-20 degrees heading to right initiated to keep medium large transport Y in sight as he descended below us in right-hand turn for airport. RA was induced by vectors from approach.

Original NASA ASRS Text

Title: TCASII RA ON APCH CTL VECTOR.

Narrative: ON VECTORS TO RWY 26, ONT APCH RPTED ACR MLG TFC AS WE ROLLED OUT OF TURN FROM FINAL. WE RPTED ACFT IN SIGHT. MLG Y BEGAN A RIGHT TURN TO FINAL AS APCH TOLD US TO FOLLOW TFC TO THE ARPT. HE WAS TO LAND 26L. WE (MLG X) WERE TO LAND 26R. ALMOST SIMULTANEOUSLY, TCAS ANNOUNCED TFC, FOLLOWED BY AN RA, 'MONITOR VERT SPD,' LIMITING DSNT TO 400 FPM. WE CONTINUED ON N HDG UNTIL SPACING 3-5-4 MI. TURNED TOWARD ARPT. INFORMED APCH OF TCAS RA. BELIEVE SPACING BY APCH INADEQUATE. TCAS WAS DISTRACTING DURING VIS MANEUVERING. F/O AT CTLS. ACFT WAS INITIALLY ON AUTOPLT. DISENGAGED AND ADDITIONAL 10-20 DEGS HDG TO RIGHT INITIATED TO KEEP MLG Y IN SIGHT AS HE DSNDED BELOW US IN RIGHT-HAND TURN FOR ARPT. RA WAS INDUCED BY VECTORS FROM APCH.

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.