Pilot of a C172RG failed to report midfield as instructed by tower controller.

Attributes
ACN	450270
Time
Date	199909
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : tki.airport
State Reference	TX
Altitude	msl single value : 2000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : tki.tower
Operator	general aviation : personal
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Navigation In Use	other
Flight Phase	descent : intermediate altitude
Flight Plan	None
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : private
Experience	flight time last 90 days : 8 flight time total : 220 flight time type : 26
ASRS Report	450270
Person 2
Affiliation	other
Function	controller : local
Qualification	controller : non radar
Events
Anomaly	non adherence : clearance other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued alert none taken : anomaly accepted
Consequence	Other
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I was on a pleasure flight from ads to tki to practice touch-and-go lndgs. On my initial call-up to tki tower there was no response. On my second call they responded. I reported 10 mi southeast. (I have concluded that I must have said southeast instead of southwest.) the tower controller told me to notify 2 mi south and expect left downwind for runway 17. I was trying to figure out how I was going to get to a left downwind from my position. That was when I realized I must have reported southeast instead of southwest. At that time I was 1-2 mi west and at midfield. I reported to tower that I was actually 2 mi west and assumed he had me in sight at midfield. He cleared me to enter right downwind. When I was turning from downwind to base, tower called me and asked my location. I responded that I was turning downwind to base and he told me I was supposed to report midfield. I did not report midfield because I was midfield when I reported 1-2 mi west and I thought he understood that I was at midfield. I then completed 2 touch-and-go lndgs and departed the airspace to the northwest.

Original NASA ASRS Text

Title: PLT OF A C172RG FAILED TO RPT MIDFIELD AS INSTRUCTED BY TWR CTLR.

Narrative: I WAS ON A PLEASURE FLT FROM ADS TO TKI TO PRACTICE TOUCH-AND-GO LNDGS. ON MY INITIAL CALL-UP TO TKI TWR THERE WAS NO RESPONSE. ON MY SECOND CALL THEY RESPONDED. I RPTED 10 MI SE. (I HAVE CONCLUDED THAT I MUST HAVE SAID SE INSTEAD OF SW.) THE TWR CTLR TOLD ME TO NOTIFY 2 MI S AND EXPECT L DOWNWIND FOR RWY 17. I WAS TRYING TO FIGURE OUT HOW I WAS GOING TO GET TO A L DOWNWIND FROM MY POS. THAT WAS WHEN I REALIZED I MUST HAVE RPTED SE INSTEAD OF SW. AT THAT TIME I WAS 1-2 MI W AND AT MIDFIELD. I RPTED TO TWR THAT I WAS ACTUALLY 2 MI W AND ASSUMED HE HAD ME IN SIGHT AT MIDFIELD. HE CLRED ME TO ENTER R DOWNWIND. WHEN I WAS TURNING FROM DOWNWIND TO BASE, TWR CALLED ME AND ASKED MY LOCATION. I RESPONDED THAT I WAS TURNING DOWNWIND TO BASE AND HE TOLD ME I WAS SUPPOSED TO RPT MIDFIELD. I DID NOT RPT MIDFIELD BECAUSE I WAS MIDFIELD WHEN I RPTED 1-2 MI W AND I THOUGHT HE UNDERSTOOD THAT I WAS AT MIDFIELD. I THEN COMPLETED 2 TOUCH-AND-GO LNDGS AND DEPARTED THE AIRSPACE TO THE NW.

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.