# NTSB FTW86FA098: Cessna T210N, N9444Y, Sperry, OK, June 3, 1986

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Field investigation · Final report
- Date: June 3, 1986, 07:52 local (12:52 UTC)
- Place: Sperry, OK
- Coordinates: 36.289802, -95.98088 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=36.2898&lon=-95.9809&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 3 fatal
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 21909
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW86FA098
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/21909/pdf
- Page: https://openairdocs.org/ntsb/FTW86FA098

## Sequence of events

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

- Loss of control - in flight, cruise - normal
  - spatial disorientation, pilot in command (cause)
  - remedial action - not performed, pilot in command (cause)
  - weather condition - rain (contributing factor)
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

THE AIRPLANE DEPARTED JONES (RIVERSIDE) AIRPORT AND CLIMBED, ON COURSE, TO ITS ASSIGNED ALTITUDE. IT WAS IN IMC CONDITIONS AND A IFR FLIGHT PLAN HAD BEEN FILED. THE PILOT TOLD ATC (AFTER BEING ASKED) THAT HIS RIDE WAS 'SMOOTH SO FAR'. SHORTLY THEREAFTER THE AIRCRAFT STARTED VEERING RIGHT OF ITS ASSIGNED HEADING. THE PILOT WAS ADVISED OF THIS AND ACKNOWLEDGED. A CORRECTION WAS INITIATED BUT NOT COMPLETED. THE AIRCRAFT AGAIN VEERED RIGHT, ENTERED A STEEP DESCENT, AND DISAPPEARED FROM RADAR. THE PILOT DID NOT RESPOND TO FURTHER RADIO CALLS FROM ATC. THE AIRCRAFT CRASHED IN A STEEP NOSE DOWN ATTITUDE WHILE AT A HIGH RATE OF SPEED DURING A HEAVY RAINSTORM. POST ACCIDENT EXAMINATION REVEALED NO EVIDENCE OF PREIMPACT MECHANICAL FAILURE OR MALFUNCTION OF THE AIRCRAFT. PATHOLOGICAL AND TOXICOLOGICAL EXAMINATIONS OF THE PILOT REVEALED NO EVIDENCE OF A HUMAN FACTORS PROBLEM.

## Aircraft

- Registration: [N9444Y](https://openairdocs.org/deregistered/N9444Y-1989-03-16), registration cancelled 1989-03-16, S/N 21064507 (OpenAirDocs)
- Reported make and model: CESSNA T210N
- Registry model: [Cessna T210N](https://openairdocs.org/model/cessna-t210n) (registry code 2073456) (OpenAirDocs)
- Category: Airplane
- Serial number: T210-64507
- Airframe hours: 1755
- Engines: CONTINENTAL TSIO-520-R 285 horsepower reciprocating
- Damage: Destroyed
- Flight: Business, Part 91
- Registered owner: A-Llis Production Co.
- Airworthiness certificate: Standard, Normal
- Departed: RVS, TULSA, OK
- Destination: FOE, TOPEKA, KS
- Flight plan: IFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 49; flight instructor, commercial; airplane ratings: multi-engine land, single-engine sea, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: left; toxicology performed; flight hours: 4,320 total

## Weather

- Conditions: Instrument (IMC), Day
- Wind: 70° at 4 knots
- Visibility: 4 statute miles
- Lowest ceiling: 500 ft overcast
- Temperature: 70 °F, dew point 70 °F
- Altimeter: 30.00 inHg
- Observed at: TUL, 5 nm away

## 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 19860603021469A](https://openairdocs.org/incident/19860603021469A), Jun 3, 1986: Cessna T210N, Sperry, OK, Destroyed, 2 fatal. The aircraft struck the ground in an area of heavy rainstorms. Pilot failed to update weather at en route stop.

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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