Narrative:

I departed from ZZZ to do some proficiency flying and went to hwd to practice lndgs. Inbound to hwd; I contacted hwd tower and requested touch-and-goes. The tower cleared me to land on runway 28L. I thought that I had been cleared for the option. Shortly before I touched down on runway 28L; the tower cleared an extra for a left 270 degree departure off of runway 28R. The extra began takeoff shortly just as I touched down. I raised the flaps and reset elevator trim to take off again for a circuit. As I applied takeoff power on the roll; the extra was already airborne and ahead; climbing rapidly. I realized that he would need to make a left turn across my course just as I became airborne. At that point hwd tower asked me to state my intentions. I replied that I wished to make left closed traffic and would stay behind and below the extra until he was clear. I apologized and asked if I had missed a call or whether I had misunderstood their instruction. The controller replied that I had been cleared to land; not for the option. I apologized again and asked how I should proceed. The tower instructed me to go ahead and continue to make left traffic. I have missed very few radio calls in my approximately 20 yrs of flying. I attribute this mistake to: 1) fatigue. 2) failure to properly evaluate my own physical/mental condition prior to initiating the flight. I was recovering from a head cold. I was not taking any medication and my sinuses were clear; but I was still somewhat fatigued from lack of rest. I was expecting to be cleared for the option; so I failed to recognize that I had been cleared to land. The extra's departure request should have caused me to question whether I was cleared for the option; and I should have; in any event; made a full-stop taxi back; even if I believed that I was cleared for touch-and-goes. I make a practice of evaluating my health for flight during the drive to the airport and during preflight. In this case; I did not recognize clues that should have shown that I was not as alert and sharp as I needed to be in order to fly.

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Original NASA ASRS Text

Title: A C206 PILOT WAS CLEARED FOR FULL STOP BUT FLEW A TOUCH AND GO; CONFLICTING WITH ANOTHER DEPARTING AIRCRAFT.

Narrative: I DEPARTED FROM ZZZ TO DO SOME PROFICIENCY FLYING AND WENT TO HWD TO PRACTICE LNDGS. INBOUND TO HWD; I CONTACTED HWD TWR AND REQUESTED TOUCH-AND-GOES. THE TWR CLRED ME TO LAND ON RWY 28L. I THOUGHT THAT I HAD BEEN CLRED FOR THE OPTION. SHORTLY BEFORE I TOUCHED DOWN ON RWY 28L; THE TWR CLRED AN EXTRA FOR A L 270 DEG DEP OFF OF RWY 28R. THE EXTRA BEGAN TKOF SHORTLY JUST AS I TOUCHED DOWN. I RAISED THE FLAPS AND RESET ELEVATOR TRIM TO TAKE OFF AGAIN FOR A CIRCUIT. AS I APPLIED TKOF PWR ON THE ROLL; THE EXTRA WAS ALREADY AIRBORNE AND AHEAD; CLBING RAPIDLY. I REALIZED THAT HE WOULD NEED TO MAKE A L TURN ACROSS MY COURSE JUST AS I BECAME AIRBORNE. AT THAT POINT HWD TWR ASKED ME TO STATE MY INTENTIONS. I REPLIED THAT I WISHED TO MAKE L CLOSED TFC AND WOULD STAY BEHIND AND BELOW THE EXTRA UNTIL HE WAS CLR. I APOLOGIZED AND ASKED IF I HAD MISSED A CALL OR WHETHER I HAD MISUNDERSTOOD THEIR INSTRUCTION. THE CTLR REPLIED THAT I HAD BEEN CLRED TO LAND; NOT FOR THE OPTION. I APOLOGIZED AGAIN AND ASKED HOW I SHOULD PROCEED. THE TWR INSTRUCTED ME TO GO AHEAD AND CONTINUE TO MAKE L TFC. I HAVE MISSED VERY FEW RADIO CALLS IN MY APPROX 20 YRS OF FLYING. I ATTRIBUTE THIS MISTAKE TO: 1) FATIGUE. 2) FAILURE TO PROPERLY EVALUATE MY OWN PHYSICAL/MENTAL CONDITION PRIOR TO INITIATING THE FLT. I WAS RECOVERING FROM A HEAD COLD. I WAS NOT TAKING ANY MEDICATION AND MY SINUSES WERE CLR; BUT I WAS STILL SOMEWHAT FATIGUED FROM LACK OF REST. I WAS EXPECTING TO BE CLRED FOR THE OPTION; SO I FAILED TO RECOGNIZE THAT I HAD BEEN CLRED TO LAND. THE EXTRA'S DEP REQUEST SHOULD HAVE CAUSED ME TO QUESTION WHETHER I WAS CLRED FOR THE OPTION; AND I SHOULD HAVE; IN ANY EVENT; MADE A FULL-STOP TAXI BACK; EVEN IF I BELIEVED THAT I WAS CLRED FOR TOUCH-AND-GOES. I MAKE A PRACTICE OF EVALUATING MY HEALTH FOR FLT DURING THE DRIVE TO THE ARPT AND DURING PREFLT. IN THIS CASE; I DID NOT RECOGNIZE CLUES THAT SHOULD HAVE SHOWN THAT I WAS NOT AS ALERT AND SHARP AS I NEEDED TO BE IN ORDER TO FLY.

Data retrieved from NASA's ASRS site as of May 2009 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.