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N562AD accident description

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Crash location 33.217778°N, 117.351389°W
Nearest city Oceanside, CA
33.195870°N, 117.379483°W
2.2 miles away
Tail number N562AD
Accident date 24 Jan 2009
Aircraft type Cessna 172S
Additional details: None

NTSB Factual Report

On January 24, 2009, about 1042 Pacific standard time, a Cessna 172S, N562AD, collided with the ground following a loss of engine power during a go-around at Oceanside Municipal Airport, Oceanside, California. The commercial pilot and the passenger sustained serious injuries. The airplane sustained substantial damage. The airplane was registered to, and operated by, California Flight Academy, El Cajon, California. Visual meteorological conditions prevailed at Oceanside. An instrument flight plan was filed and activated for the 14 Code of Federal Regulations Part 91 personal cross-country flight, which departed El Cajon at 1021, with a destination of Torrance, California.

According to information provided by Federal Aviation Administration (FAA) Air Traffic Control (ATC) personnel, the airplane departed from Gillespie Airport, El Cajon, and established contact with approach control. The flight was cleared to climb to 6,000 feet mean sea level (msl). At 1028, the pilot reported that he was climbing through 4,400 feet for 6,000 feet. No further transmissions were received from the airplane. At 1038, the controller called the airplane and received no response. He noticed the airplane was descending and made several more attempts at contact with no response. The airplane squawked the transponder codes for radio failure and then for emergency as it descended towards Oceanside Airport.

During an interview conducted by an FAA inspector on February 19, 2009, the pilot reported that the airplane was in cruise flight near Oceanside, when he determined that the airplane was "leaking fuel at a very high rate." He said that he did not see any fuel leaking, but that the fuel gauges were moving steadily toward zero at a higher rate than normal. At this time, the airplane's radios were working, and the pilot does not recall seeing any indication of an alternator malfunction. He moved the fuel selector handle to the right tank position, and the fuel gauges kept moving "steadily toward zero after he did so." The engine then lost power, so the pilot began descending directly toward Oceanside for an emergency landing. He was unable to contact air traffic control during the descent, as the airplane's radios had now failed. As he approached runway 24, he realized he was "too high and fast," so he overflew the runway and reversed course at the west end of the airport to attempt a landing on runway 06. However, he was "still too high and fast" to land on runway 06 and did not have enough altitude or airspeed to make another attempt at landing on runway 24.

In a written statement submitted to the NTSB on July 9, 2009, the pilot provided additional information about the sequence of events. He stated that after switching to the right fuel tank, he attempted to make a radio call to declare an emergency; however, as he tried to make the call, there was a "complete electrical failure." He turned towards Oceanside to make an emergency landing, and as he started descending, the engine lost power. The pilot said that since the airplane was above clouds, he could not see the Oceanside Airport until the airplane was directly above it. He “tried to land by circling from midfield but couldn’t touch down at the runway, landed long and crashed.”

During an interview conducted by an FAA inspector on January 26, 2009, the passenger, who was a student pilot, reported a similar sequence of the events to that reported by the pilot. The passenger's report differed in that he did not report the loss of engine power following the pilot's movement of the fuel selector valve. The passenger stated that as the airplane neared the end of runway 06, the pilot pulled up to initiate a go-around, and “he did not recall hearing the engine come back to full power as the plane pitched up to a climb attitude.”

Additionally, in a written statement submitted to the Safety Board on February 12, 2009, the passenger stated that upon reaching 6,000 feet msl, the pilot engaged the autopilot. When the pilot attempted to disengage the autopilot and descend to Oceanside, it would not disengage, and so he switched the avionics master switch off and back on. The passenger further stated that the pilot then “squawked [a transponder code] and told me to look out for traffic.”

According to witness statements obtained by the Oceanside Police Department, the airplane was observed flying eastbound at a low altitude about .5 miles east of the Oceanside airport. One witness reported that the airplane was "bobbling" in the air and that she knew from this unsteady flight pattern that it was going to crash. Another witness reported that the airplane was "very quiet and he was unsure if the engine was running." This witness observed the airplane impact the ground, slide forward, collide with and sever a sewer valve. The airplane then struck a wood pole and came to a stop. The right wing and the engine separated from the fuselage during the impact sequence.

During recovery of the airplane by salvage personnel, about 10 gallons of fuel were drained from the right tank and 15 gallons from the left tank. When the airplane was examined at the salvage yard under the supervision of an FAA inspector by representatives from Cessna Aircraft Company, Lycoming Engines, and California Flight Academy, the firewall-mounted fuel strainer contained blue colored fuel that tested negative for water contamination. The right fuel tank cap was loose when installed, and there were fuel stains noted on the upper wing surface in the immediate area of the cap. There were no fuel stain streaks leading aft from the cap towards the wing trailing edge. The left fuel tank cap was tight when installed. The fuel selector handle was in the right tank position and the fuel shutoff valve handle was in the open (forward) position.

The fuel selector valve was removed and examined. It was determined to be near, but not in, the right tank detent. If the fuel valve had been in this position in flight, fuel flow to the engine would have been partially restricted. However, impact damage to the fuel valve, including the input shaft being bent, precluded determination of the exact in-flight position of the fuel selector valve.

The propeller remained attached at the crankshaft flange. One propeller blade was undamaged, and the other blade displayed leading edge gouging, torsional twisting, and chordwise scratches. Examination of the Lycoming IO-360-L2A engine revealed no evidence of any pre-impact mechanical malfunctions. A splice repair to the alternator output electrical wire was observed, and when the wire was removed, the splice came apart and revealed evidence of electrical arcing. Evidence of electrical arcing was also observed on the engine baffling and cowling in the area of the wire splice. The alternator was retained for testing.

The airplane’s avionics switch is a two-pole rocker-type switch that controls electrical power to avionics bus 1 and bus 2. Placing either side of the rocker switch in the ON position supplies power to the corresponding avionics bus. During examination of the airplane, the avionics bus 1 switch was found in the OFF position and the bus 2 switch was found in the ON position. Power is supplied to communications radio 1 by avionics bus 1 and to the transponder by avionics bus 2.

On April 3, 2009, under the supervision of an FAA inspector, the alternator was bench tested and found to be functional. It produced 40 amps at 4,000 rpm with no abnormal indications.

The pilot held a commercial pilot certificate with ratings for airplane multi-engine land and instrument airplane. He also held a private pilot certificate with a rating for airplane single-engine land. According to the pilot, he received all of his flight training from California Flight Academy under their Part 141 program. Examination of the pilot’s flight logbook indicated that he satisfactorily completed the practical test for his commercial certificate in a multi-engine land airplane on April 20, 2008. After this date, there were no further entries in the logbook until December 18, 2008. From December 18 to December 21, 2008, the pilot logged 11 flights with 3.0 hours flown in a multi-engine airplane and 13.0 hours flown in the accident airplane. There were no further logbook entries. The logbook indicated the pilot had accumulated a total flight time of 298.6 hours, of which 154.8 hours were in the accident make and model airplane.

NTSB Probable Cause

A defective alternator wire splice that resulted in an intermittent electrical system malfunction and erroneous fuel gauge readings, and, a loss of engine power for an undetermined reason.

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