X non adherence to ATC instruction had near midair collision with aircraft on final approach.

Attributes
ACN	304484
Time
Date	199505
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : azo
State Reference	MI
Altitude	agl bound lower : 200 agl bound upper : 200
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : azo
Operator	general aviation : instructional
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	descent : approach landing other
Flight Plan	None
Aircraft 2
Make Model Name	Cessna Single Piston Undifferentiated or Other Model
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Person 1
Affiliation	Other
Function	instruction : instructor
Qualification	pilot : cfi
Experience	flight time last 90 days : 50 flight time total : 280 flight time type : 80
ASRS Report	304484
Person 2
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private
Events
Anomaly	conflict : nmac non adherence : clearance
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 100 vertical : 100
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

X shooting BC17 A20 cleared for approach at upjohn cleared to land runway 17 following company cessna. Short final controller said X make right base for runway 23. At 200 ft and short final we had no choice but to make a landing on runway 23. Unknown to us other traffic cleared for landing on runway 23, causing a near miss. 2 hours previous a similar circumstance occurred with several other planes by the same controller. Also the controller kept giving us other approach procedures other than requested. I believe that the controller did not have full grasp on what was going on and how many planes and where they were. He may have been accidentally transposing numbers of aircraft. Also not remembering what instructions he was giving to what traffic. Controller said that he had told us to make right base and traffic for sequence #2 for runway 23. Why would I want runway 23 right traffic if I have an instrument student shooting a BC17 approach to minimums?

Original NASA ASRS Text

Title: X NON ADHERENCE TO ATC INSTRUCTION HAD NMAC WITH ACFT ON FINAL APCH.

Narrative: X SHOOTING BC17 A20 CLRED FOR APCH AT UPJOHN CLRED TO LAND RWY 17 FOLLOWING COMPANY CESSNA. SHORT FINAL CTLR SAID X MAKE R BASE FOR RWY 23. AT 200 FT AND SHORT FINAL WE HAD NO CHOICE BUT TO MAKE A LNDG ON RWY 23. UNKNOWN TO US OTHER TFC CLRED FOR LNDG ON RWY 23, CAUSING A NEAR MISS. 2 HRS PREVIOUS A SIMILAR CIRCUMSTANCE OCCURRED WITH SEVERAL OTHER PLANES BY THE SAME CTLR. ALSO THE CTLR KEPT GIVING US OTHER APCH PROCS OTHER THAN REQUESTED. I BELIEVE THAT THE CTLR DID NOT HAVE FULL GRASP ON WHAT WAS GOING ON AND HOW MANY PLANES AND WHERE THEY WERE. HE MAY HAVE BEEN ACCIDENTALLY TRANSPOSING NUMBERS OF ACFT. ALSO NOT REMEMBERING WHAT INSTRUCTIONS HE WAS GIVING TO WHAT TFC. CTLR SAID THAT HE HAD TOLD US TO MAKE R BASE AND TFC FOR SEQUENCE #2 FOR RWY 23. WHY WOULD I WANT RWY 23 R TFC IF I HAVE AN INST STUDENT SHOOTING A BC17 APCH TO MINIMUMS?

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.