On May 31, 2015, about 1720 Alaska daylight time (AKD), a wheel-ski equipped Cessna 185 airplane, N1694M, and a tricycle gear equipped Cessna 172 airplane, N8525U, collided midair while landing at Talkeetna Airport, Talkeetna, Alaska. The Cessna 185 was registered to, and operated by, Talkeetna Air Taxi, Inc., Talkeetna, as a visual flight rules (VFR) on-demand commercial air tour, under the provisions of Title 14 Code of Federal Regulation (CFR) Part 135, when the accident occurred. The commercial pilot and three of the four passengers sustained no injuries, with the fourth passenger sustaining minor injuries. The Cessna 172 was registered to Artic's Air Academy, LLC, Palmer, Alaska, and operated by the student pilot as a VFR cross-country flight under the provisions of Title 14 CFR Part 91. The student pilot, and sole occupant of the airplane, sustained serious injuries. Visual meteorological conditions prevailed in the area at the time of the accident. The Cessna 185 departed Talkeetna Airport about 1456 for a flight seeing tour around Denali National Park, and a VFR flight plan was on file. The Cessna 172 departed Palmer Airport, Palmer, about 1625, destined for Talkeetna airport with no flight plan on file. During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC) on June 1, 2015, the pilot of the Cessna 185 stated that while approaching Talkeetna (TKA), he was the fifth commercial air tour airplane in sequence for landing. He remembered hearing the Cessna 172 make a radio transmission stating his position as 10 miles south of the airport, but did not remember any other transmissions. He also stated that he did not see the Cessna 172. In an interview with the NTSB IIC and an FAA air safety inspector on June 4, 2015, the pilot of the Cessna 172 stated that he was conducting a solo cross-country flight from Palmer to Talkeetna when the accident occurred. As he approached the traffic pattern, he saw two airplanes operated by another commercial operator and heard them make a radio transmission that they were on final approach. After watching the two airplanes pass, the pilot turned onto the final approach segment of the traffic pattern. When he was in a position to land, he reduced power and added full flaps. Just before starting to flare, about 20-30 feet above the ground, he heard what he described as a loud "unworldly" sound. He felt the airplane get hit and pushed forward. At that point, the airplane descended at an estimated 45-degree angle until impact with the ground. After the collision, both airplanes remained joined together during and after impact with the ground. The debris field was about 460 feet long with the initial fragments located about 62 feet prior to the runway threshold. The main wreckage came to rest about 5 feet off of the left side of the runway with the Cessna 185 on top of the Cessna 172. Talkeetna Airport (TKA) is a public airport in Class E airspace between the hours of 1700-0500 universal coordinated time (UTC), and Class G airspace all other times. It is not served by an operating control tower. There are two main runways, 18 and 36, with 18 having a right traffic pattern and 36 having a left traffic pattern. An FAA Flight Service Station (FSS) is located on the airport property and provides local airport advisories to aircraft operating in the area. It was staffed with one air traffic control specialist at the time of the accident. During a review of FAA FSS recordings of the common traffic advisory frequency (CTAF) 123.6, both airplanes can be heard transmitting position reports in relation to the airport traffic pattern. At 1706, AKD [0106:44 universal coordinated time (UTC)], the pilot of the Cessna 172 reported his position as 10 miles south of TKA and requested traffic advisories. The FSS replied advising pilot of four arrivals, three from the northwest and one from the west that was landing at the village strip. The three arrivals from the northwest were using the callsigns 5FK, 44Q, and 424KT. About 1708:56, the pilot of N727KT reported being over "Chase," which is a visual flight rules (VFR) reporting point for TKA. At 1709:50, the Cessna 185 pilot said "Talkeetna radio one six niner four mike is uh chase two thousand with kilo one eight and the traffic." FSS replied "November one six niner four mike Talkeetna radio thank you." "Chase" is a VFR reporting point located about 8 miles northwest of TKA. At 1710:01, the Cessna 172 pilot reported his location as about 5 miles south with intentions to overfly the airport midfield at 2,500 feet and enter a right downwind traffic pattern leg for runway 18. About 1710:39, the pilot of N320KT reported being over "chase." At 1711:34, the Cessna 172 pilot stated that he was flying over midfield at 2,200 feet and would be entering the traffic pattern on a right downwind for runway 18. At 1713:01, the Cessna 172 pilot reported that he was right downwind for runway 18. At 1713:08, the Cessna 185 pilot reported "niner four mike's right base number two one eight," when actually he was number three in the sequence behind N727KT and N320KT. About 1713:15, the pilot of N727KT reported clear of runway 18. At 1714:15, the Cessna 172 pilot reported that he was "on base to final runway 18." About 1714:22, the pilot of N320KT reported clear of runway 18. At 1715:18, the FSS air traffic control specialist asks if the Cessna 185 is okay, after witnessing the collision between the Cessna 185 and the Cessna 172. A transcript of the CTAF recording is located in the public docket for this accident. A Garmin 296 handheld GPS was located in the wreckage of the Cessna 185. The unit was sent to the NTSB Vehicle Recorders Laboratory in Washington D.C. for examination. A NTSB electrical engineer was able to extract the GPS data for the accident flight, which included, in part: time, latitude, longitude, and GPS altitude. Groundspeed and course information were derived from the extracted parameters. The GPS data logs for May 31, 2015, revealed that the airplane entered the traffic pattern on a right base leg about 2.5 miles from the end of the runway. The Alaska Supplement in effect on the day of the accident contained a statement for the Talkeetna Airport "See Section C notices for tfc pattern information." The Section C notice contained only a pictorial display of a right traffic pattern, but no reference to reporting points, including "Chase" or written description of non-standard traffic pattern entry procedures. The Anchorage Sectional Aeronautical Chart with an effective date of May 28, 2015, displayed "Chase" and one other VFR waypoint for TKA. The sectional chart located in the aircraft of the Cessna 172 was the previous edition and was no longer current. This previous chart did not contain the VFR waypoints. The FAA Aeronautical Information Manual (AIM) recommends inbound pilots to non-towered airports announce their position 10 miles from the airport, entering the downwind leg, base leg, final approach leg and when exiting the runway. 14 CFR 91.113(g) states, in part: "When two or more aircraft are approaching an airport for the purpose of landing, the aircraft at the lower altitude has the right-of-way, but it shall not take advantage of this rule to cut in front of another which is on final approach to land or to overtake that aircraft." The FAA Airplane Flying Handbook (FAA-H-8083-3A) states "Compliance with the basic rectangular traffic pattern reduces the possibility of conflicts at airports without an operating control tower." It further states "When entering the traffic pattern at an airport without an operating control tower, inbound pilots are expected to observe other aircraft already in the pattern and to conform to the traffic pattern in use." The Handbook recommends entering the traffic pattern at a 45° angle to the downwind leg of the runway to be utilized. A flight track map overlay, and tabular data corresponding to the accident flight are available in the public docket for this accident. The closest weather reporting facility is Talkeetna Airport, Talkeetna. At 1653, an aviation routine weather report (METAR) at Talkeetna reported in part: wind 350 at 4 knots; visibility 10 statute miles; sky condition clear; temperature 78 degrees F; dew point 39 degrees F; altimeter 29.76 inHg.