<< >> NASA ASRS Report 556087, August 2002

A C560 crew, 1 of 2 aircraft, reporting on final to con, received a TCASII TA from a 3RD aircraft not reporting his position.

Attributes
ACN	556087
Time
Date	200208
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : con.airport
State Reference	NH
Altitude	msl single value : 1000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Citation V
Navigation In Use	other
Flight Phase	descent : approach
Route In Use	approach : traffic pattern
Flight Plan	VFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	M-20 J (201)
Operating Under FAR Part	Part 91
Navigation In Use	ils localizer & glide slope : 35
Flight Phase	descent : approach
Route In Use	approach : instrument precision
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : cfi pilot : atp
Experience	flight time last 90 days : 30 flight time total : 4100 flight time type : 10
ASRS Report	556087
Person 2
Affiliation	company : air taxi
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne critical non adherence : published procedure other anomaly other
Independent Detector	aircraft equipment : tcas other flight crewa other flight crewb
Resolutory Action	flight crew : took evasive action
Miss Distance	horizontal : 3000 vertical : 200
Supplementary
Problem Areas	Airport Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

While on base leg to concord airport runway 35, aircraft #2 reported on the frequency. Aircraft #2 stated he was on a practice ILS to runway 35, 5 mi out. At this time we advised we were on base getting ready to turn a 1 mi final. Aircraft #2 advised he would look for us. We had no contact with aircraft #2 at this time. As we turned final, 1 mi, the TCASII alert went off. TCASII showed the other aircraft at 200 ft below us. At that we time broke off the approach and advised the mooney that there appeared to be another aircraft in the pattern with no radio. He advised he was on a 3 mi final at that time. As we turned downwind aircraft #2 stated he was on the missed and climbing out. We continued our approach and landed with no further incident.

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Original NASA ASRS Text

Title: A C560 CREW, 1 OF 2 ACFT, RPTING ON FINAL TO CON, RECEIVED A TCASII TA FROM A 3RD ACFT NOT RPTING HIS POS.

Narrative: WHILE ON BASE LEG TO CONCORD ARPT RWY 35, ACFT #2 RPTED ON THE FREQ. ACFT #2 STATED HE WAS ON A PRACTICE ILS TO RWY 35, 5 MI OUT. AT THIS TIME WE ADVISED WE WERE ON BASE GETTING READY TO TURN A 1 MI FINAL. ACFT #2 ADVISED HE WOULD LOOK FOR US. WE HAD NO CONTACT WITH ACFT #2 AT THIS TIME. AS WE TURNED FINAL, 1 MI, THE TCASII ALERT WENT OFF. TCASII SHOWED THE OTHER ACFT AT 200 FT BELOW US. AT THAT WE TIME BROKE OFF THE APCH AND ADVISED THE MOONEY THAT THERE APPEARED TO BE ANOTHER ACFT IN THE PATTERN WITH NO RADIO. HE ADVISED HE WAS ON A 3 MI FINAL AT THAT TIME. AS WE TURNED DOWNWIND ACFT #2 STATED HE WAS ON THE MISSED AND CLBING OUT. WE CONTINUED OUR APCH AND LANDED WITH NO 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.