<< >> NASA ASRS Report 307268, June 1995

Air carrier X TCASII RA with bizjet while on visual approach to multiple runway operation parallel runways.

Attributes
ACN	307268
Time
Date	199506
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : sfo
State Reference	CA
Altitude	msl bound lower : 1500 msl bound upper : 1500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : oak tower : pit
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent : approach
Flight Plan	IFR
Aircraft 2
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	other : unknown
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 120 flight time total : 10000 flight time type : 3000
ASRS Report	307268
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	conflict : airborne less severe non adherence : clearance
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Miss Distance	horizontal : 700 vertical : 0
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

After turning on to final for runway 28R we got a TCASII 'reduce descent' caused by an overtaking bizjet behind us on approach for runway 28L. We had the bizjet in sight on base leg and made our turn to final well inside him. He had requested and received clearance for a long landing from tower. We were in the process of slowing to our stabilized approach speed for landing on the approach end of runway 28R, and apparently the bizjet was later than we were in slowing for landing. He never passed us on final and both planes landed safely. This is the 2ND time, on 2 consecutive days, that we got a TCASII RA on approach into sfo. Both were in excellent VFR WX conditions. Is bay approach reducing arrival separation too much, when visual approachs are in use?

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Original NASA ASRS Text

Title: ACR X TCASII RA WITH BIZJET WHILE ON VISUAL APCH TO MULTIPLE RWY OP PARALLEL RWYS.

Narrative: AFTER TURNING ON TO FINAL FOR RWY 28R WE GOT A TCASII 'REDUCE DSCNT' CAUSED BY AN OVERTAKING BIZJET BEHIND US ON APCH FOR RWY 28L. WE HAD THE BIZJET IN SIGHT ON BASE LEG AND MADE OUR TURN TO FINAL WELL INSIDE HIM. HE HAD REQUESTED AND RECEIVED CLRNC FOR A LONG LNDG FROM TWR. WE WERE IN THE PROCESS OF SLOWING TO OUR STABILIZED APCH SPD FOR LNDG ON THE APCH END OF RWY 28R, AND APPARENTLY THE BIZJET WAS LATER THAN WE WERE IN SLOWING FOR LNDG. HE NEVER PASSED US ON FINAL AND BOTH PLANES LANDED SAFELY. THIS IS THE 2ND TIME, ON 2 CONSECUTIVE DAYS, THAT WE GOT A TCASII RA ON APCH INTO SFO. BOTH WERE IN EXCELLENT VFR WX CONDITIONS. IS BAY APCH REDUCING ARR SEPARATION TOO MUCH, WHEN VISUAL APCHS ARE IN USE?

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.