Schroder David LANCAIR IV P N366TF
1 June 2017 · Fulton, New York, United States · No injuries
Summary
On 1 June 2017 at about 22:30 local time, a Schroder David LANCAIR IV P registered N366TF was involved in an incident near Fulton, New York, United States. 2 people were on board and nobody was injured. The NTSB has published a probable cause for this accident; it is quoted in full below.
The record
- Date
- at 22:30
- Classification
- Incident
- Location
- Fulton, New York, United States
- Nearest airport
- Oswego County (FZY)
- Coordinates
- 43.3508, -76.3881
- Aircraft
- Schroder David LANCAIR IV P
- Registration
- N366TF
- Category
- Airplane
- Year built
- 2000
- Engines
- 1
- Operator
- Not recorded
- Operating rule
- Part 91: General Aviation
- Purpose of flight
- Personal
- Phase of flight
- Not recorded
- Route
- Fulton → Fulton
- Aircraft damage
- Not recorded
- Weather
- VMC
- Light
- Day
- NTSB number
- CEN17IA233
People
Nobody was injured.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| 2 | 0 | 0 | 0 | 2 |
Probable cause
The loss of oil pressure and subsequent engine overspeed/surge during a zero g-force maneuver, which resulted in the separation of a crankshaft counterweight and loss of engine power.
Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.
Read the full NTSB narrative
The pilot and a flight instructor planned to conduct an inflight calibration of an angle of attack indicator. Following a zero g-force maneuver, engine oil pressure decreased to 3 psi and engine speed increased to 3,140 rpm. Immediately after the engine overspeed, a total loss of power occurred. The pilot performed a forced landing to the departure airport without further incident. Examination of the engine revealed one of the two rear crankshaft counterweights (6th order) separated from the crankshaft, with a 6th order counterweight connecting pin lodged in the crankcase between cylinder Nos. 4 and 6. An impression in the No. 1 connecting rod matched the shape of a 6th order counterweight connecting pin. The oil sump contained significant debris, including four counterweight pin retaining snap rings, four counterweight pin retainer plates, and two 6th order counterweight connecting pins. Based on the examination, the lack of oil pressure and subsequent engine rpm overspeed/surge likely caused the separation of the crankshaft counterweight and engine failure.
Quoted verbatim from the NTSB record.
Other Schroder David LANCAIR accidents
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 8 Mar 2026 | Schroder David LANCAIR IV-P | Feather Sound, Florida, United States | Majul Enterprises Inc | No injuries | - |
Other accidents in this area
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 5 Mar 2017 | Cessna 150J | Argyle, New York, United States | - | Minor injuries | - |
| 21 Sep 2017 | Dji PHANTOM | Hoffman Island, New York, United States | - | No injuries | - |
| 28 Nov 2017 | Boeing 777 | Jamaica, New York, United States | Egypt Airlines | Unknown | - |
| 4 Jul 2017 | Luscombe 8 | Remsen, New York, United States | - | Fatal | 1 |
| 28 Jul 2017 | Thomas J Hankamp VAN'S AIRCRAFT RV4 | Poughkeepsie, New York, United States | - | No injuries | - |
| 21 Sep 2017 | Thomas J Murray KITFOX SUPER SPORT | Old Forge, New York, United States | - | Minor injuries | - |