Thursday, June 29, 2017

Lancair IV-P, registered to and operated by MS Rochelle LLC, N366TF: Accident occurred June 01, 2017 at Oswego County Airport (KFZY), Fulton, New York

The National Transportation Safety Board did not travel to the scene of this incident

Additional Participating Entities:

Airworthiness Certification Office; Atlanta, Georgia
Continental Motors; Mobile, Alabama
Lancair Owners and Builders Organization; Saint Louis, Missouri

Aviation Accident Factual Report - National Transportation Safety Board:

Investigation Docket - National Transportation Safety Board:

Location: Fulton, NY
Incident Number: CEN17IA233
Date & Time: 06/01/2017, 1830 EDT
Registration: N366TF
Aircraft Damage: None
Defining Event: Loss of engine power (total)
Injuries: 2 None
Flight Conducted Under: Part 91: General Aviation - Personal


On June 1, 2017, at 1830 eastern daylight time, a Lancair IV-P airplane, N366TF, lost engine power and conducted a forced landing at the Oswego County Airport (FZY), Fulton, New York. The pilot and flight instructor were not injured and the airplane sustained minor damage. The airplane was registered to and operated by MS Rochelle LLC under the provisions of 14 Code of Federal Regulations Part 91 as a personal flight. Day visual meteorological conditions prevailed for the local flight, which departed from FZY at 1819

The purpose of the flight was to calibrate an Advanced Flight Systems Advanced Pro 3 angle of attack system, which included a series of zero g-force maneuvers. According to the flight instructor, during the first maneuver, he and the pilot noticed an engine overspeed, as well as a noticeable "bang" and a total loss of engine power. The pilot performed a forced landing at FZY without further incident. During the descent and landing, the propeller continued to windmill.

According to data downloaded from the onboard Electronics International MVP-50 engine monitor, engine start occurred at 1806. A normal engine runup occurred at 1816, including magneto and propeller governor checks. Takeoff with full engine power occurred at 1819 and the airplane climbed normally to 12,000 ft msl.

At 1829:29, the zero g-force maneuver occurred. Oil pressure indications, which had been normal until this time, decreased to 3 psi by 1829:32, followed by an engine overspeed of 3,140 rpm at 1829:34. From 1829:34 to 1830:10, engine rpm indications varied from zero to 2,700 rpm, and oil pressure indications varied from zero to 50 psi. At 18:29:38, the alternator charge indication dropped to zero.


The composite airplane was constructed from a kit with components manufactured by Lancair International, Inc. The airplane was equipped with a Continental Motors TSIO-550E engine (s/n 803138), an MT Propeller USA MTV-14-D constant-speed four-blade wood propeller (non-counterweighted), and a McCauley C290D3-K/T43 propeller governor. According to the engine's type certificate data sheet, maximum engine rpm was 2,700 rpm. The oil sump capacity was 12 quarts, with 6.5 quarts usable at a 14.5 degrees nose down attitude.

According to engine logbooks, a teardown inspection occurred on December 18, 2008, due to a propeller strike. On October 15, 2012, Barrett Precision Engines Inc. overhauled the engine, which included documented compliance with Continental Motors Service Bulletin 00-3, Counterweight Installation. On February 1, 2017, an entry was recorded to correct a rough running engine and a rising No. 3 cylinder exhaust gas temperature; which maintenance attributed to incorrect timing. On April 7, 2017, the No. 3 cylinder was replaced, due to a fractured bolt on the intake rocker shaft.


Examination of the engine revealed the crankcase was breached in several places and the camshaft drive gear was displaced away from the crankshaft drive gear. Extensive internal damage was noted to the interior of the crankcase and cylinder skirts, due to connecting rod contact. Both magnetos were dislodged from their respective mounts. One of the two rear crankshaft counterweights (6th order) was separated from the crankshaft, and the Nos. 1 and 4 connecting rods were fractured.

The oil tube from the sump to the oil pump was compromised and thermal discoloration and oil starvation distress were noted on the Nos 2, 3, 4, and 6 connecting rods and bearings. The oil sump contained significant metal fragments, including four counterweight pin retaining snap rings, four counterweight pin retainer plates and two 6th order counterweight connecting pins. After separating the engine case, a 6th order counterweight connecting pin was found lodged in the crankcase between cylinders Nos. 4 and 6 and an impression in the No. 1 connecting rod matched the shape of a 6th order counterweight connecting pin.


On November 15, 2015, a Lancair IV-P accident occurred that involved the same model engine, propeller, and propeller governor as this incident. The sequence of events for the accident (NTSB# CEN16LA043) involved a practice emergency descent with a 0.5 g-force load factor, which led to an engine oil pressure drop, engine overspeed, and total loss of power. The investigation concluded that a duel magneto failure occurred due to an engine overspeed/surge inducing shock loads on the gear train. During this investigation, several Lancair pilots who had competed in the Reno Air Races stated that low G maneuvering would often result in a transient drop in engine oil pressure and an engine surge and/or overspeed.

According to the Federal Aviation Administration (FAA) small airplane standards staff, an angle of attack system calibration procedure which requires zero g-force flight is not approved for installation on certified aircraft.

Pilot Information

Certificate: Flight Instructor; Commercial
Age: 36, Male
Airplane Rating(s): Single-engine Land
Seat Occupied: Right
Other Aircraft Rating(s): None
Restraint Used: 3-point
Instrument Rating(s): Airplane
Second Pilot Present: Yes
Instructor Rating(s): Airplane Single-engine
Toxicology Performed: No
Medical Certification: Class 3 With Waivers/Limitations
Last FAA Medical Exam: 04/29/2016
Occupational Pilot: No
Last Flight Review or Equivalent: 05/10/1997
Flight Time:  1204 hours (Total, all aircraft), 1 hours (Total, this make and model), 1140 hours (Pilot In Command, all aircraft), 12 hours (Last 90 days, all aircraft), 5 hours (Last 30 days, all aircraft), 1 hours (Last 24 hours, all aircraft)

Aircraft and Owner/Operator Information

Registration: N366TF
Aircraft Category: Airplane
Year of Manufacture: 2000
Amateur Built: Yes
Airworthiness Certificate: Experimental; Normal
Serial Number: LIV-388
Landing Gear Type: Retractable - Tricycle
Seats: 4
Date/Type of Last Inspection: 11/16/2016, Condition
Certified Max Gross Wt.:
Time Since Last Inspection:
Engines: 1 Reciprocating
Airframe Total Time: 1146.57 Hours at time of accident
Engine Manufacturer: CONT MOTOR
Engine Model/Series: TSIO-550 SER
Registered Owner: On file
Rated Power: 360 hp
Operator: On file
Operating Certificate(s) Held: None

Meteorological Information and Flight Plan

Conditions at Accident Site: Visual Conditions
Condition of Light: Day
Observation Facility, Elevation: KFZY, 475 ft msl
Distance from Accident Site: 0 Nautical Miles
Observation Time: 1854 EDT
Direction from Accident Site: 111°
Lowest Cloud Condition: Clear
Visibility: 10 Miles
Lowest Ceiling: None
Visibility (RVR):
Wind Speed/Gusts: 9 knots /
Turbulence Type Forecast/Actual: / None
Wind Direction: 300°
Turbulence Severity Forecast/Actual: /
Altimeter Setting: 29.97 inches Hg
Temperature/Dew Point: 14°C / 4°C
Precipitation and Obscuration: No Obscuration; No Precipitation
Departure Point: FULTON, NY (FZY)
Type of Flight Plan Filed: None
Destination: FULTON, NY (FZY)
Type of Clearance: VFR
Departure Time: 1815 EDT
Type of Airspace: Class E

Airport Information

Runway Surface Type: Asphalt
Airport Elevation: 475 ft
Runway Surface Condition: Dry
Runway Used: 33
IFR Approach: None
Runway Length/Width: 5196 ft / 100 ft
VFR Approach/Landing:  Forced Landing

Wreckage and Impact Information

Crew Injuries: 2 None
Aircraft Damage: None
Passenger Injuries: N/A
Aircraft Fire: None
Ground Injuries: N/A
Aircraft Explosion: None
Total Injuries: 2 None
Latitude, Longitude:  43.350833, -76.388056 (est)

NTSB Identification: CEN17IA233
14 CFR Part 91: General Aviation
Incident occurred Thursday, June 01, 2017 in Fulton, NY
Aircraft: SCHRODER DAVID LANCAIR IV P, registration: N366TF
Injuries: 2 Uninjured.

This is preliminary information, subject to change, and may contain errors. Any errors in this report will be corrected when the final report has been completed. NTSB investigators used data provided by various sources and may not have traveled in support of this investigation to prepare this aircraft incident report.

On June 1, 2017, at 1830 eastern daylight time, an amateur built Lancair IV-P airplane, N366TF, lost engine power and was forced landed at the Oswego County Airport (FZY), Fulton, New York. The pilot and flight instructor were not injured and the airplane sustained minor damage. The airplane was registered to and operated by MS Rochelle LLC under the provisions of 14 Code of Federal Regulations Part 91 as a personal flight. Day visual meteorological conditions prevailed for the local flight, which departed from FZY at 1819.

The purpose of the flight was to calibrate an angle of attack indicator, which required a series of zero G maneuvers. During the first maneuver, the flight instructor and pilot noticed the engine overspeed, as well as a noticeable "bang". Following a total loss of power, a forced landing was performed at FZY without further incident. Post flight examination revealed engine damage which included two fractured connecting rods. The engine was retained for follow on examination

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