Narrative:

Small aircraft X approaching from the northeast, I called drake tower to report 10 mi and landing with information juliette. Tower again asked for position. Reply 9 mi northeast landing with information. Tower instructed to enter right downwind for landing 34. On approaching midfield right downwind, I heard small transport Y reporting VOR for landing. Tower instructed the small transport Y to enter left downwind for 34 and #2 to land behind small aircraft X. I announced entering right downwind at midfield and was cleared to land. The small transport Y was instructed to extend downwind and again told #2 for landing. On my entering right base 34 with gear down for landing, I was instructed to cancel landing clearance and to extend my downwind for #2 landing. I replied (as I was on right base and unable to continue downwind), I will have to do a 360 (to comply with new landing sequence). Tower replied to start an immediate south turn that the small transport Y was directly beneath me. I turned south and replied that I had the airplane in sight and requested the tower telephone number. The small transport Y landed. I had to maneuver a 360 turn and land. Upon landing I called the tower, talked to the controller, requested the tape be pulled, told her I wanted a copy of the tape and that there was no excuse for the way the landing sequence was handled. The controller replied that the tape had been pulled and the supervisor would call me tomorrow (sat). I have not heard from a supervisor or any tower personnel. I cannot see what advantage was served by the tower changing the landing sequence of 2 airplanes, especially at such a late time in the landing sequence.

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Original NASA ASRS Text

Title: SMA Y NON ADHERENCE TO ATC INSTRUCTIONS HAD NMAC WITH SMA X IN TFC PATTERN. SEE AND AVOID CONCEPT.

Narrative: SMA X APCHING FROM THE NE, I CALLED DRAKE TWR TO RPT 10 MI AND LNDG WITH INFO JULIETTE. TWR AGAIN ASKED FOR POS. REPLY 9 MI NE LNDG WITH INFO. TWR INSTRUCTED TO ENTER R DOWNWIND FOR LNDG 34. ON APCHING MIDFIELD R DOWNWIND, I HEARD SMT Y RPTING VOR FOR LNDG. TWR INSTRUCTED THE SMT Y TO ENTER L DOWNWIND FOR 34 AND #2 TO LAND BEHIND SMA X. I ANNOUNCED ENTERING R DOWNWIND AT MIDFIELD AND WAS CLRED TO LAND. THE SMT Y WAS INSTRUCTED TO EXTEND DOWNWIND AND AGAIN TOLD #2 FOR LNDG. ON MY ENTERING R BASE 34 WITH GEAR DOWN FOR LNDG, I WAS INSTRUCTED TO CANCEL LNDG CLRNC AND TO EXTEND MY DOWNWIND FOR #2 LNDG. I REPLIED (AS I WAS ON R BASE AND UNABLE TO CONTINUE DOWNWIND), I WILL HAVE TO DO A 360 (TO COMPLY WITH NEW LNDG SEQUENCE). TWR REPLIED TO START AN IMMEDIATE S TURN THAT THE SMT Y WAS DIRECTLY BENEATH ME. I TURNED S AND REPLIED THAT I HAD THE AIRPLANE IN SIGHT AND REQUESTED THE TWR TELEPHONE NUMBER. THE SMT Y LANDED. I HAD TO MANEUVER A 360 TURN AND LAND. UPON LNDG I CALLED THE TWR, TALKED TO THE CTLR, REQUESTED THE TAPE BE PULLED, TOLD HER I WANTED A COPY OF THE TAPE AND THAT THERE WAS NO EXCUSE FOR THE WAY THE LNDG SEQUENCE WAS HANDLED. THE CTLR REPLIED THAT THE TAPE HAD BEEN PULLED AND THE SUPVR WOULD CALL ME TOMORROW (SAT). I HAVE NOT HEARD FROM A SUPVR OR ANY TWR PERSONNEL. I CANNOT SEE WHAT ADVANTAGE WAS SERVED BY THE TWR CHANGING THE LNDG SEQUENCE OF 2 AIRPLANES, ESPECIALLY AT SUCH A LATE TIME IN THE LNDG SEQUENCE.

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.