WPR09FA248

The failure of both pilots to see and avoid each other's aircraft.

A Cessna 172N and a Cessna 310P collided in flight in a common practice area for airwork. A witness was flying on a southerly heading within the immediate area of the collision and noticed a silhouette of an airplane, which appeared to be a Cessna 172 at his 10 to 11 o'clock position. The airplane appeared to be performing maneuvers and making turns in a counter-clockwise direction, followed by a turn in a clockwise direction. The witness stated that he noticed another airplane entering the area from the west, traveling at a high rate of speed on an easterly heading. He added that he was unable to see what kind of airplane it was and only saw a "black object" due to the sun being almost on the horizon. The witness continued to watch both airplanes and noted the fast moving airplane was continuing on an easterly heading while the Cessna 172N was still performing maneuvers on a southerly heading around the same altitude. The witness observed both airplanes collide, disintegrate into small pieces, and fall to the ocean below. Review of recorded radar data revealed that the Cessna 310P was maneuvering within a common practice area about 5 miles south of the shoreline at various altitudes. The data depicted the Cessna 172N on a southerly course at an altitude of 3,000 feet msl while conducting a series of shallow left and right turns prior to performing a left 360-degree turn to a southerly heading. The Cessna 310P was on an easterly heading at an altitude of 3,000 feet msl for about 2 minutes prior to the collision. The radar data depicted the two airplanes converging nearly perpendicular to one another about five miles south of the shoreline. During examination of the recovered wreckage, transfer marks were identified consistent with the radar-derived collision angle. Both airplanes were operating under visual conditions when they collided.

HISTORY OF FLIGHT On May 18, 2009, about 1801 Pacific daylight time, a Cessna 172N, N738NN, registered to and operated by Aero Aviation LLC, Long Beach, California as a Title 14 Code of Federal Regulations (CFR) Part 91 local instructional flight and a Cessna 310P, N777AL, registered to and operated by the pilot as a Title 14 CFR 91 local personal flight, collided in midair about five miles south of Long Beach, California. The flight instructor and student pilot receiving instruction in the Cessna 172N were killed. The airline transport licensed pilot, sole occupant of the Cessna 310P was killed. Visual meteorological conditions prevailed and no flight plan was filed for either flight. The Cessna 172N departed from the Long Beach Airport (LGB), Long Beach, about 1751. The Cessna 310P departed from LGB about 1720. A witness, who was flying within the immediate area of the collision, reported that after crossing the coastline near Long Beach on a southerly heading he noticed a silhouette of an airplane, which appeared to be a Cessna 172 at his 10 to 11 o'clock position. The airplane appeared to be performing maneuvers and making turns in a counter-clockwise direction, followed by a turn in a clockwise direction. The witness continued to track the airplane due to its close proximity to his location. The witness altered his course slightly to the right, while continuing to monitor the Cessna's location. The witness stated that as he looked to his right while turning, he noticed another airplane entering the area from the west, traveling at a high rate of speed on an easterly heading. He stated that he was unable to see what kind of airplane it was and only saw a "black object" due to the sun being almost on the horizon. The witness continued to watch both airplanes and noted the fast moving airplane was continuing on an easterly heading, while the Cessna 172 was still performing maneuvers on a southerly heading around the same altitude. Shortly after, the witness observed both airplanes collide and "immediately disintegrated into small pieces." The witness stated that the debris from both airplanes descended into the ocean. The witness contacted local air traffic control to report the collision and continued to circle the area of floating debris until first responders arrived. Review of recorded radar data obtained from the Federal Aviation Administration (FAA) revealed that the Cessna 310P was maneuvering within a common practice area about 5 miles south of the Long Beach Harbor at altitudes from 3,000 feet to 4,700 feet msl. The data depicted the Cessna 172P departing LGB and remaining on a southerly course at an altitude of 3,000 feet msl while conducting a series of shallow left and right turns. At 1759:53, the 172N performed a left 360-degree turn to a southerly heading. The radar data revealed that the Cessna 310P was on an easterly heading at an altitude of 3,000 feet msl from 1759:25 until the collision. At 1801:16, the radar data depicted the two airplanes converging nearly perpendicular to one another about five miles south of the Long Beach Harbor breakwater wall. PERSONNEL INFORMATION The flight instructor of the Cessna 172N, age 32, held a commercial pilot certificate with airplane single-engine land, airplane multi-engine land, and instrument airplane ratings. He also possessed a flight instructor certificate with airplane single-engine land, airplane multi-engine land, and instrument airplane ratings. A first-class airman medical certificate was issued on June 12, 2008, with the limitation that stated "must wear corrective lenses." The pilot reported on his most recent medical certificate application that he had accumulated 1,760 total flight hours. As of the pilot's most recent logbook entry dated May 8, 2009, he had accumulated 1,880.9 hours of flight time. The student pilot on the Cessna 172N, age 32, did not hold a student pilot certificate. Review of his logbook revealed that as May 7, 2009, he had accumulated 3.7 hours of flight time. The pilot of the Cessna 310P, age 54, held an airline transport pilot certificate with an airplane multi-engine land rating. The pilot also possessed a commercial pilot certificate with airplane single-engine land ratings. A third-class airman medical certificate was issued July 22, 2008, with the limitation that stated "must have available glasses for near vision." The pilot reported on his most recent medical certificate application that he had accumulated 3,070 total flight hours. Review of the pilot's logbook revealed that the pilot completed his most recent flight review on December 31, 2008. As of the pilot's last logbook entry dated December 31, 2007, he had accumulated 3,377.6 hours of flight time. AIRCRAFT INFORMATION The Cessna 172N, a four-seat, high-wing, fixed-gear airplane, serial number (S/N) 17270109, was manufactured in 1977. It was powered by a Lycoming O-320-H2AD engine that was equipped with a McCauley fixed-pitch propeller. The Cessna 172N was painted white with blue and gray trim, extending from the forward area of the airplane aft to the empennage. Review of copies of maintenance logbook records showed an annual inspection was completed on December 5, 2008, at a recorded tachometer reading of 2,800.0 hours, airframe total time of 8,528.2 hours, and engine time since major overhaul of 200 hours. The most recent 100-hour inspection was conducted on May 11, 2009, at a tachometer time of 2,898.2 hours. The tachometer hour reading was observed at 2899.1 hours and a hobbs time of 6,495.5 hours. The Cessna 310P, a low-wing, retractable-gear airplane, serial number (S/N) 310P0141, was manufactured in 1969. It was powered by two Continental IO-470-VO engines that were equipped with two variable-pitch McCauley propellers. The Cessna 310P was painted white with orange and brown trim. Review of copies of maintenance logbook records showed an annual inspection was completed on May 11, 2009, at a recorded tachometer reading of 1,086.2 hours, airframe total time of 3,864.2 hours, left engine total time since major overhaul of 469.4 hours, and a right engine total time since major overhaul of 974.1 hours A logbook entry for the left engine dated May 11, 2009, stated in part "Note: #6 Cyl replaced due to stripped exhaust studs during exhaust manifold removal." METEOROLOGICAL INFORMATION A review of recorded data from the Automated Surface Observation System (ASOS) at LGB revealed 1753 weather conditions were wind from 290 degrees at 10 knots, visibility 10 statute miles, clear sky, temperature 21 degrees Celsius, dew point 13 degrees Celsius, and an altimeter setting of 29.90 inches of Mercury. Review of Sun and Moon Data from the US Naval Observatory revealed sunset was at 1949 and end of civil twilight at 2017. Using NTSB software, the sun was calculated to be on a 12.5328 degree angle above the horizon. The Azimuth to sun was calculated to be 280.4 degrees with an elevation of 20.5 degrees. WRECKAGE AND IMPACT INFORMATION The United States Coast Guard (USCG) initiated search and rescue operations and was assisted by the Los Angeles County Sheriff's Department. The USCG suspended search and rescue operations on the afternoon of May 19, 2009. The Los Angeles County Sheriff's Department continued search operations using divers and sonar equipment. On the afternoon of May 20, 2009, Los Angeles County Sheriff divers located the Cessna 172N and the remains of the Cessna 310P about 5 miles off shore, submerged within about 80 feet of water. The Los Angeles County Sheriff continued their search efforts using sonar equipment on May 21, 2009 and May 22, 2009. The wreckage of the Cessna 172N and portions of the Cessna 310P were located on the sea floor of the Pacific Ocean about five miles south of Long Beach Harbor breakwater wall within about 80 feet of water. MEDICAL AND PATHOLOGICAL INFORMATION