King Air C90 E90
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 6
Situational Awareness; Distraction
Deviation / Discrepancy - Procedural Clearance; Ground Incursion Taxiway
Flight Crew Landed As Precaution
Human Factors
Aircraft was cleared to land on runway 32; and they requested to land long which I approved. As I watched aircraft I thought it was strange that it was floating so long over the runway; then I realized aircraft landed on taxiway A. I told the ground controller a King Air just landed on taxiway A. Thankfully; no other aircraft were on taxiway A.I was not expecting the aircraft to land on taxiway A; and my expectation possibly caused a delay in recognizing the aircraft landed on the taxiway instead of runway 32. I will continue to remain vigilant and scan the runways and taxiways; and be more aware of the possibility of aircraft landing on taxiways.
Flight was IFR with vectors for a visual approach to runway 32. I cancelled IFR when I reached VMC condition-s during a vectored descent. I gained sight of the field when about 8 miles west of the field and cancelled IFR. Tracon cleared me to turn right for a right base entry for visual 32 and told me to contact Tower which I did. I was 6 miles out at that call. Tower told me to continue on the right base for 32 but to plan on passing through final and turn back again to re-intercept final again for 32 in order to provide spacing for slower traffic on one mile final: a type of modified S turn. I was descending through 1000 ft at that time and felt I had sufficient altitude to stabilize the final after re-intercepting; so I accepted the directions. When re-intercepting final for 32 I asked if I could land long in order to taxi clear at A4 which they approved. They immediately told an aircraft landing on 22 to hold short of 32 and I verified visually that the traffic was already on the ground slowing nicely before 32. I added full flaps as I approached 400 ft AGL and intercepted final but did not realize that I had lined up on taxiway A until deep into the flare. I was shocked to see the yellow centerline and it delayed my reaction time so that I was unable to perform a go-around before the plane settled to the runway. I knew I was cleared across 32 and saw that there were no aircraft moving on the ground so I maintained control of the aircraft and continued down A until reaching A4 and reported to Ground there.
The pilot and Tower controller reported an aircraft that landed on a parallel taxiway rather than the runway.