TCASII TA used to evade suspected conflict.

Attributes
ACN	288096
Time
Date	199411
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : cjs
State Reference	FO
Altitude	msl bound lower : 12000 msl bound upper : 12000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Operator	general aviation : corporate
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 91
Navigation In Use	Other Other
Flight Phase	cruise other descent other
Route In Use	enroute airway : uj27
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 75 flight time total : 14000 flight time type : 2000
ASRS Report	288096
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : commercial
Events
Anomaly	non adherence : required legal separation non adherence : far other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other other : unspecified cockpit
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 18000 vertical : 1600
Supplementary
Air Traffic Incident	other

Narrative:

On a flight from (mmto) mexico city to (kelp) el paso, tx, while approaching juarez on UJ27, under radar contact with monterey center, we were given, and read back the following clearance. 'Cleared to el paso via UJ27, maintain (our assigned altitude) expect the el paso 25 DME arc.' UJ27 is on the 155 degree radial of the juarez (cjs) VOR. We were further cleared to descend to 12000 ft. Out of approximately 20000 ft, center began to ask for our DME readouts from the cjs VOR. We gave them at approximately 25 DME, 20 DME and 16 DME. We kept waiting for clearance to either intercept the elp 25 DME arc or the elp arc approach. Next, monterey center informed us that we had opposite traffic, outbound from the cjs VOR on the 161 degree radial, climbing to 12000 ft and asked what our crossing radial was? We reported inbound to cjs on uj-27 level at 12000 ft. When center again asked what radial we were crossing, we figured that center thought that they had cleared us to intercept the elp 25 DME arc. About the same time, we picked up the traffic on TCASII at 10 O'clock and 3000 ft below us. At 1900 ft separation, we got a traffic alert. We made a right turn and informed monterey center that we had the el paso airport in sight. They handed us off to el paso approach where we were vectored for a visual approach without further incident.

Original NASA ASRS Text

Title: TCASII TA USED TO EVADE SUSPECTED CONFLICT.

Narrative: ON A FLT FROM (MMTO) MEXICO CITY TO (KELP) EL PASO, TX, WHILE APCHING JUAREZ ON UJ27, UNDER RADAR CONTACT WITH MONTEREY CTR, WE WERE GIVEN, AND READ BACK THE FOLLOWING CLRNC. 'CLRED TO EL PASO VIA UJ27, MAINTAIN (OUR ASSIGNED ALT) EXPECT THE EL PASO 25 DME ARC.' UJ27 IS ON THE 155 DEG RADIAL OF THE JUAREZ (CJS) VOR. WE WERE FURTHER CLRED TO DSND TO 12000 FT. OUT OF APPROX 20000 FT, CTR BEGAN TO ASK FOR OUR DME READOUTS FROM THE CJS VOR. WE GAVE THEM AT APPROX 25 DME, 20 DME AND 16 DME. WE KEPT WAITING FOR CLRNC TO EITHER INTERCEPT THE ELP 25 DME ARC OR THE ELP ARC APCH. NEXT, MONTEREY CTR INFORMED US THAT WE HAD OPPOSITE TFC, OUTBOUND FROM THE CJS VOR ON THE 161 DEG RADIAL, CLBING TO 12000 FT AND ASKED WHAT OUR XING RADIAL WAS? WE RPTED INBOUND TO CJS ON UJ-27 LEVEL AT 12000 FT. WHEN CTR AGAIN ASKED WHAT RADIAL WE WERE XING, WE FIGURED THAT CTR THOUGHT THAT THEY HAD CLRED US TO INTERCEPT THE ELP 25 DME ARC. ABOUT THE SAME TIME, WE PICKED UP THE TFC ON TCASII AT 10 O'CLOCK AND 3000 FT BELOW US. AT 1900 FT SEPARATION, WE GOT A TFC ALERT. WE MADE A R TURN AND INFORMED MONTEREY CTR THAT WE HAD THE EL PASO ARPT IN SIGHT. THEY HANDED US OFF TO EL PASO APCH WHERE WE WERE VECTORED FOR A VISUAL APCH WITHOUT FURTHER INCIDENT.

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.