History of Flight
On March 27, 2016, at 1147 eastern daylight time, a Robinson Helicopter R44, registered as N776JM, was destroyed when it struck terrain near Canadensis, Pennsylvania. The private pilot, who was also the operator, was fatally injured. The flight was conducted under Title 14 Code of Federal Regulations Part 91 in instrument meteorological conditions (IMC) without a filed flight plan. Departure was from Doylestown Airport (DYL) at 1109, with a planned destination of Mountain Bay Airpark (PA49) in Greentown, Pennsylvania, approximately 60 nautical miles north.
A witness located about half a mile northwest of the accident site reported hearing an aircraft engine overhead but could not see the helicopter due to cloud cover, which he estimated at 200 feet above the treetops. He then heard two loud booms, similar to a car hitting a tree.
Recorded GPS data from the helicopter indicated that during the final 10 minutes of flight, altitude gradually increased as terrain rose. Upon approaching a ridge crest, GPS altitude rose sharply to about 2,200 feet msl, roughly 200–300 feet agl. The reported cloud ceiling at that time was also about 2,200 feet msl. The helicopter then descended slightly while making a left 330° turn, then climbed again, with GPS data showing it above the cloud ceiling. It continued northwest for about 40 seconds, climbing while ground speed decreased from 70 knots to about 20 knots. The helicopter reversed course briefly, made several track and altitude changes, and executed a left 270° turn before the final data point, located about 135 feet north of the accident site at 2,678 feet msl (800 feet agl).
Pilot Information
FAA records show the pilot held a private pilot certificate with ratings for airplane single-engine land, rotorcraft helicopter, and instrument airplane. His most recent third-class medical certificate was issued March 10, 2016. Logbooks reflected a total flight experience of 2,333 hours, including 449 hours in rotorcraft (345 hours in the same make and model as the accident helicopter). In the three months before the accident, he logged 7 hours, 5 of which in the accident helicopter. He had flown from DYL to PA49 17 times in the accident helicopter and 7 times in his airplane during the preceding 24 months. No flight experience in actual or simulated instrument meteorological conditions was logged during that period.
Aircraft Information
The four-seat, single-main-rotor, single-engine helicopter, serial number 1738, was manufactured in 2007. It was powered by a 260-horsepower Lycoming O-540-F1B5 engine. The helicopter was not certificated for instrument flight rules operation. The most recent 100-hour inspection was completed on July 1, 2015, at which time the airframe and engine had about 629 hours since new. Total time on the accident day could not be determined due to impact and fire damage, but the pilot logged about 34 hours since that inspection.
Meteorological Information
The nearest reporting station, Pocono Mountains Municipal Airport (10 miles southwest, elevation 1,915 feet), reported at 1153: overcast ceiling at 300 feet agl, visibility 7 statute miles, wind from 140° at 7 knots, temperature 4°C, dew point 3°C, altimeter 30.31 inHg. Overcast ceilings at 200 feet agl were reported from 0953 to 1118. A weather computer model and satellite data showed clouds likely from near the surface through 4,000 feet msl. Radar indicated no precipitation.
The area forecast issued at 0445, valid at departure, predicted overcast ceilings between 1,500 and 2,000 feet msl with tops 3,000–4,000 feet, improving to broken/scattered by 1100. However, AIRMETs warned of mountain obscuration and IFR conditions due to clouds, fog, and mist along the route, with an AIRMET at 1045 indicating mountain obscuration still in effect.
At DYL (1054), conditions were: wind variable at 3 knots, visibility 10 statute miles, overcast ceiling 1,700 feet agl, temperature 7°C, dew point 4°C. The pilot's son, also a pilot, reviewed the weather with him that morning. Both were aware of low ceilings and forecast improvement and considered conditions suitable. The pilot did not obtain a flight service weather briefing.
Wreckage and Impact
The helicopter impacted a wooded area about 100 yards north of an east-west ridge, approximately 20 feet below the ridge top at 2,000 feet msl. The wreckage path extended downhill on a heading of about 325° magnetic for about 175 feet. All major components were present; wreckage was fragmented and partially burned. Continuity of flight controls could not be confirmed due to damage. Throttle control linkages were impact- and fire-damaged; the collective pitch control linkage was found in the full open position, and the carburetor control arm was beyond full open with its stop separated. The mixture control was in full rich, and carburetor heat was on.
The empennage, tail rotor gearbox, and a fractured tail rotor blade were near the initial impact. The tail rotor gearbox rotated freely. Both tail rotor blades had leading edge gouging. The engine, main rotor gearbox, and tailboom separated from the fuselage. The main rotor driveshaft was fracture-separated at the hub consistent with overload and rotated freely. Both main rotor blades remained attached to the hub and were damaged by impact and fire. Cockpit flight controls were found in debris.
Engine examination revealed fire and impact damage. Crankshaft rotation established powertrain continuity through the valvetrain to accessory section, except for number 5 cylinder pushrods impacted. Thumb compression was confirmed on all cylinders. Both magnetos were damaged and could not produce spark. Spark plugs appeared consistent with "worn out – normal" per the Champion Check-A-Plug chart.
Additional Information
FAA publications describe spatial disorientation as a loss of proper bearings or mental confusion regarding position or movement relative to the earth, with contributing factors including changes in acceleration, flight in IMC, and unperceived attitude changes. The FAA's Airplane Flying Handbook notes that the vestibular sense can confuse pilots when the horizon is obscured, generating false sensations.
Medical and Pathological Information
An autopsy determined the cause of death as multiple blunt force injuries. Toxicological testing detected diltiazem and metoprolol (blood pressure medications, not impairing and reported by the pilot), as well as ethanol consistent with postmortem production. The pilot's family reported he woke up dizzy with an elevated heart rate on the morning of the accident but felt well before the flight.