N2173S

HISTORY OF FLIGHTOn July 13, 2017, about 2258 eastern daylight time, a Piper PA-44-180, N2173S, was destroyed during an inflight breakup near Marineland, Florida. The flight instructor and private pilot receiving instruction were fatally injured. The airplane was registered to and operated by Sunrise Aviation, Inc., Ormond Beach, Florida, as a Title 14 Code of Federal Regulations (CFR) Part 91 instructional flight. Visual meteorological conditions prevailed and no flight plan was filed for the cross-country flight, which originated from Brunswick, Georgia, at an undetermined time with an intended destination of Ormond Beach Municipal Airport (OMN), Ormond Beach, Florida.

A representative from the operator reported that the accident flight was a roundtrip night cross-country instructional flight from OMN to Brunswick. Following one landing at Brunswick, the flight was to return to OMN as part of the pilot's initial commercial multi-engine rating training course. According to the company's flight training syllabus, the flight should have consisted of dead reckoning, pilotage, performance planning, GPS or VOR navigation, cross-country planning, normal takeoff and landings, intercepting and tracking navigational systems, and instrument procedures.

Federal Aviation Administration (FAA) air traffic control (ATC) audio communications and ground tracking radar information, which also included Automatic Dependent Surveillance-Broadcast (ADS-B) data were reviewed. The airplane was on a southerly course along the coastline at altitudes between 5,500 ft and 5,700 ft mean sea level (msl). At 2250, the flight contacted ATC and advised that they were at 5,500 ft, which the controller acknowledged. At 2257:36, the data showed the airplane began to descend. The pilot radioed the controller 26 seconds later and stated that they were starting down and had the OMN lights in sight. At 2258:27, the airplane climbed from 5,200 ft to 5,600 ft msl over the course of 4 seconds. The airplane remained at 5,600 ft msl for about 3 seconds then initiated a descending right turn, which continued for about 11 seconds. At 2258:45, the airplane had descended to 3,000 ft msl. The last ADS-B data point, recorded at 2258:46, showed the flight at 3,600 ft msl, about 0.3 mile northwest of the main wreckage. See Figure 1.

Between 2259:29 and 2259:48, the controller unsuccessfully attempted to establish radio communication with the accident airplane. The FAA issued an alert notice (ALNOT) shortly thereafter. The main wreckage was located by law enforcement air units about 1141 the following day.

Figure 1: Radar data showing final airplane flightpath PERSONNEL INFORMATIONFlight Instructor

The flight instructor, age 70, held an airline transport pilot certificate with airplane single-engine land and airplane single-engine sea ratings, along with commercial pilot privileges for airplane multi-engine land and glider. He also held a flight instructor certificate with airplane single- and multi-engine and instrument ratings. A third-class FAA airman medical certificate was issued to the instructor on June 4, 2016, with the limitation, "must have available glasses for near vision." On the application for that medical certificate, the instructor reported 34,830 total hours of flight experience, of which 400 hours were in the previous 6 months. The flight instructor's logbook was not located.

Pilot Receiving Instruction

The pilot receiving instruction, age 27, held a private pilot certificate with airplane single-engine land and instrument airplane ratings. He was issued a second-class FAA medical certificate on August 17, 2016 with no limitations. A review of flight school records revealed that, as of July 12, 2017, he had accumulated 131.2 hours of flight experience, of which 7 hours were in multi-engine airplanes. AIRCRAFT INFORMATIONThe four-seat, low-wing, retractable gear, twin-engine airplane, serial number 44-7995245, was manufactured in 1979. The airplane was powered by 180-horsepower O-360-E1A6D and LO-360-F1A6D engines. Both engines were equipped with Hartzell constant-speed, 2-bladed propellers. The airplane was equipped with two 55-gallon fuel tanks.

Review of the airframe and engine maintenance logbooks revealed that the most recent annual inspection was completed on June 12, 2017, at an airframe total time of 9,460.5 hours and right engine tachometer hour reading of 9,460.5 hours. At the time of the inspection, the left engine had accumulated 2,174.0 hours since major overhaul and had an engine total time of 6,724.5 hours; the right engine had accumulated 3,122.4 hours since major overhaul and had an engine total time of 9,958.7 hours.

Using reported weights of both occupants (223 lbs and 185 lbs), an airplane empty weight of 2,460 lbs, and an estimated fuel load of 72 gallons (full fuel minus about 2 hours of flight time), the airplane was estimated to weigh about 3,285 lbs at the time of the accident. Maximum gross weight is 3,801 pounds. METEOROLOGICAL INFORMATIONRecorded weather observation data from Daytona Beach International Airport (DAB), Daytona Beach, Florida, located about 30 miles south of the accident site, at 2253 included wind from 090° at 3 knots, 10 statute miles visibility, a broken cloud layer at 25,000 ft, temperature 28°C, dew point 26°C, and an altimeter setting of 30.15 inches of mercury. AIRPORT INFORMATIONThe four-seat, low-wing, retractable gear, twin-engine airplane, serial number 44-7995245, was manufactured in 1979. The airplane was powered by 180-horsepower O-360-E1A6D and LO-360-F1A6D engines. Both engines were equipped with Hartzell constant-speed, 2-bladed propellers. The airplane was equipped with two 55-gallon fuel tanks.

Review of the airframe and engine maintenance logbooks revealed that the most recent annual inspection was completed on June 12, 2017, at an airframe total time of 9,460.5 hours and right engine tachometer hour reading of 9,460.5 hours. At the time of the inspection, the left engine had accumulated 2,174.0 hours since major overhaul and had an engine total time of 6,724.5 hours; the right engine had accumulated 3,122.4 hours since major overhaul and had an engine total time of 9,958.7 hours.

Using reported weights of both occupants (223 lbs and 185 lbs), an airplane empty weight of 2,460 lbs, and an estimated fuel load of 72 gallons (full fuel minus about 2 hours of flight time), the airplane was estimated to weigh about 3,285 lbs at the time of the accident. Maximum gross weight is 3,801 pounds. WRECKAGE AND IMPACT INFORMATIONThe airplane impacted terrain about 25 miles north of OMN. The main wreckage came to rest inverted within a heavily wooded area. Trees directly above the wreckage were broken, consistent with little to no forward movement of the airplane at impact. The outboard portions of the left and right wings, baggage door, and a portion of the right side of the stabilator were located throughout a 0.5-mile-long and 0.2-mile-wide debris path in water and marshland northwest of the main wreckage. The fuselage came to rest inverted on a heading about 022° magnetic. Various debris, including fragments of the left stabilator, were located within about 50 ft of the fuselage. The wreckage was recovered to a secure location for further examination.

Fuselage

Examination of the recovered wreckage revealed that the roof structure was compressed into the cabin seating area. The fuselage was partially separated at fuselage station (FS) 156. The instrument panel was crushed aft into the front seat area. The cabin door and baggage area door were separated. Both the left and right inboard portion of the wings remained attached to the fuselage structure.

Both left and right seat control wheel horns were fragmented. The T-bar remained attached to the fuselage hinge point. The horizontal section was fragmented. The aileron control cables remained attached to the T-bar chain. The stabilator cables remained attached to the T-bar assembly. The rudder pedals were impact damaged. The rudder cables remained attached to the rudder cable assembly.

The left engine fuel selector valve lever was in the "on" position, and the right engine fuel selector valve lever was in the "off" position. The fuel selector valve positions could not be verified due to impact damage and mount separation at the fuselage. Air was applied to the fuel selector valves and continuity was established throughout each valve.

Left Wing

The outboard left wing was recovered about 0.48 mile west-northwest of the main wreckage. The main spar was fractured about wing station (WS) 105. The fiberglass wingtip was separated from the outboard wing at WS 206.7 and recovered mostly intact and undamaged. The left aileron was separated from the left outboard wing at the hinge points. Three sections of the left aileron were recovered, spanning from the inboard end about WS 106 to about WS 181. The outboard portion (25 inches) of the left aileron, including the aileron balance weight, was not recovered.

The main spar, leading edge, and upper and lower skins between about WS 105 and WS 130 were damaged and deformed up and aft indicative of an upward (positive) separation of the left outboard wing. There were several fractures and twisting deformation of the main spar structure in this area. The main spar inboard of the fracture point, between about WS 93 and WS 105, was deformed aft and down. A semicircular impact impression and tree debris were embedded in the wing structure in this area.

The aileron cables remained attached to the bellcrank and there was tearing of the WS 93 rib in an aft direction at the normal cable pass-through locations. The fractured ends of the aileron control and balance cables had a splayed appearance consistent with tension overload. The main spar fracture surfaces all had a dull, grainy appearance consistent with overstress separation. There was no evidence of any pre-existing corrosion or cracking on ...