<< >> NASA ASRS Report 513395, June 2001

An S80 flight crew climbs 500 ft on a TCASII RA to avoid NORAC traffic 200 ft below and closing while on a vectored base for sna, ca.

Attributes
ACN	513395
Time
Date	200106
Day	Sun
Place
Locale Reference	airport : sna.airport
State Reference	CA
Altitude	msl single value : 3000
Environment
Flight Conditions	Marginal
Weather Elements	other
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : sct.tracon
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Flight Phase	descent : intermediate altitude
Route In Use	approach : instrument precision arrival : on vectors
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : sct.tracon
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	513395
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	conflict : airborne critical non adherence : required legal separation
Independent Detector	aircraft equipment : tcas other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew other
Miss Distance	horizontal : 5000 vertical : 200
Supplementary
Problem Areas	ATC Human Performance Airspace Structure Flight Crew Human Performance
Primary Problem	Airspace Structure

Narrative:

ATC facility: socal approach. Location: ILS base turn at sna approach. First officer flying and vectoring for ILS approach at sna. Level at 3000 ft in hazy stratus, visibility approximately 2 mi, saw traffic on the nose indicating 200 ft low on TCASII and getting close. (Air carrier airplane, using 6 mi scale.) while attempting to get immediate turn to avoid conflict, RA indicated climb. First officer disconnected autoplt and initiated a climb. RA cleared us of conflict at approximately 3500 ft and we returned to 3000 ft. Never saw the interloper. Advised socal twice and he seemed to be completely uninterested. Continued uneventful approach to landing at sna.

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Original NASA ASRS Text

Title: AN S80 FLC CLBS 500 FT ON A TCASII RA TO AVOID NORAC TFC 200 FT BELOW AND CLOSING WHILE ON A VECTORED BASE FOR SNA, CA.

Narrative: ATC FACILITY: SOCAL APCH. LOCATION: ILS BASE TURN AT SNA APCH. FO FLYING AND VECTORING FOR ILS APCH AT SNA. LEVEL AT 3000 FT IN HAZY STRATUS, VISIBILITY APPROX 2 MI, SAW TFC ON THE NOSE INDICATING 200 FT LOW ON TCASII AND GETTING CLOSE. (ACR AIRPLANE, USING 6 MI SCALE.) WHILE ATTEMPTING TO GET IMMEDIATE TURN TO AVOID CONFLICT, RA INDICATED CLB. FO DISCONNECTED AUTOPLT AND INITIATED A CLB. RA CLRED US OF CONFLICT AT APPROX 3500 FT AND WE RETURNED TO 3000 FT. NEVER SAW THE INTERLOPER. ADVISED SOCAL TWICE AND HE SEEMED TO BE COMPLETELY UNINTERESTED. CONTINUED UNEVENTFUL APCH TO LNDG AT SNA.

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.