# NTSB NYC84LA063: Navion G, N2459T, Spring Valley, NY, December 30, 1983

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: December 30, 1983, 11:20 local (16:20 UTC)
- Place: Spring Valley, NY
- Coordinates: 41.119342, -74.049224 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=41.1193&lon=-74.0492&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 35486
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=NYC84LA063
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/35486/pdf
- Page: https://openairdocs.org/ntsb/NYC84LA063

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Loss of engine power, takeoff - initial climb
  - reason for occurrence undetermined (cause)
- Forced landing, landing
- In flight collision with terrain/water, landing

## Analysis

THE ENG LOST POWER DURING TAKEOFF & THE ACFT CRASHED BEYOND THE PERIMETER OF THE ARPT. DURING AN EXAM OF THE ACFT, ONLY A FEW DROPS OF WATER & A SLIGHT AMOUNT OF SEDIMENT WERE FOUND IN THE FUEL. NO PREIMPACT/MECHANICAL PROBLEM WAS FOUND.

## Aircraft

- Registration: [N2459T](https://openairdocs.org/aircraft/N2459T), registered now, S/N NAV-4-2459, built 1962 (OpenAirDocs)
- Reported make and model: NAVION G
- Registry model: [Navion NAVION G](https://openairdocs.org/model/navion-navion-g) (registry code 6150120) (OpenAirDocs)
- Registry engine: [Continental I0-470 series](https://openairdocs.org/engine/continental-i0-470-series) (registry code 17027, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: NAV-4-2459T
- Airframe hours: 2810
- Engines: CONTINENTAL IO-470-H 260 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Harry Koopalethes
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, April 14, 1983
- Airport: N24, Ramapo Valley, runway 26, 2,185 × 50 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 55; private; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 1,890 total, 1,560 as pilot in command, 18 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 275° at 8 knots
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 25 °F

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19831230065099A](https://openairdocs.org/incident/19831230065099A), Dec 30, 1983: Tmpson NAVIONG, Spring Valley, NY, Substantial damage. Impacted ground after power loss on takeoff. Trace amount of water found in fuel. No mechanical discrepancy found.

## Other investigations on N2459T (2)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB OAK70DVW06](https://openairdocs.org/ntsb/OAK70DVW06), Mar 19, 1970: Navion G (N2459T), Lone Pine, CA, substantial damage
- [NTSB UNK64X2443](https://openairdocs.org/ntsb/UNK64X2443), Jun 23, 1964: Navion G1 (N2459T), Needles, CA, substantial damage

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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