Piper PA161 instructor turned out of the way after observing another aircraft turning final in front of him. At the same time the tower told him to make a 360 degree turn for spacing with the same aircraft since they were unable to get a response from that aircraft.

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Attributes
ACN	533783
Time
Date	200112
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : ads.airport
State Reference	TX
Altitude	msl single value : 1500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : ads.tower
Operator	general aviation : instructional
Make Model Name	PA-28 Cherokee/Archer II/Dakota/Pillan/Warrior
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Flight Plan	None
Aircraft 2
Controlling Facilities	tower : ads.tower
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Flight Plan	None
Person 1
Affiliation	other
Function	flight crew : single pilot instruction : instructor
Qualification	pilot : commercial pilot : multi engine pilot : instrument pilot : cfi
Experience	flight time last 90 days : 120 flight time total : 1300 flight time type : 700
ASRS Report	533783
Person 2
Affiliation	other
Function	flight crew : single pilot instruction : trainee
Events
Anomaly	conflict : airborne critical conflict : nmac
Independent Detector	other controllera other flight crewa
Resolutory Action	controller : issued new clearance controller : issued advisory controller : separated traffic flight crew : took precautionary avoidance action
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 300 vertical : 300
Supplementary
Problem Areas	ATC Human Performance Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We were on final practicing an ILS approach we were cleared to land behind the aircraft in front of us. I overhead on the radio ATC trying to contact an aircraft. It sounded like he was about to cut us off on final. Just before ATC contacted me, I saw the traffic on base and he was about to cut in front of us on final. I dipped down slightly to avoid getting too close and once I saw him turning final, I turned out to the left (west) to avoid him, just as tower had the opportunity to give me instructions. I circled around back to final, per instructions by the tower and was then cleared to land again. At no time during the incident was tower able to establish contact with the other aircraft. I never felt in extreme danger, but he did get within about 300 ft or 400 ft from me. I decided to make the deviation only after I was sure what he was going to do.

Original NASA ASRS Text

Title: PIPER PA161 INSTRUCTOR TURNED OUT OF THE WAY AFTER OBSERVING ANOTHER ACFT TURNING FINAL IN FRONT OF HIM. AT THE SAME TIME THE TWR TOLD HIM TO MAKE A 360 DEG TURN FOR SPACING WITH THE SAME ACFT SINCE THEY WERE UNABLE TO GET A RESPONSE FROM THAT ACFT.

Narrative: WE WERE ON FINAL PRACTICING AN ILS APCH WE WERE CLRED TO LAND BEHIND THE ACFT IN FRONT OF US. I OVERHEAD ON THE RADIO ATC TRYING TO CONTACT AN ACFT. IT SOUNDED LIKE HE WAS ABOUT TO CUT US OFF ON FINAL. JUST BEFORE ATC CONTACTED ME, I SAW THE TFC ON BASE AND HE WAS ABOUT TO CUT IN FRONT OF US ON FINAL. I DIPPED DOWN SLIGHTLY TO AVOID GETTING TOO CLOSE AND ONCE I SAW HIM TURNING FINAL, I TURNED OUT TO THE L (W) TO AVOID HIM, JUST AS TWR HAD THE OPPORTUNITY TO GIVE ME INSTRUCTIONS. I CIRCLED AROUND BACK TO FINAL, PER INSTRUCTIONS BY THE TWR AND WAS THEN CLRED TO LAND AGAIN. AT NO TIME DURING THE INCIDENT WAS TWR ABLE TO ESTABLISH CONTACT WITH THE OTHER ACFT. I NEVER FELT IN EXTREME DANGER, BUT HE DID GET WITHIN ABOUT 300 FT OR 400 FT FROM ME. I DECIDED TO MAKE THE DEV ONLY AFTER I WAS SURE WHAT HE WAS GOING TO DO.

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.