# NTSB SEA87FA145: Cessna T210N, N6326Y, Avery, ID, July 21, 1987

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Field investigation · Final report
- Date: July 21, 1987, 16:55 local (23:55 UTC)
- Place: Avery, ID
- Coordinates: 47.170009, -115.800163 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=47.1700&lon=-115.8002&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 2 fatal
- Status: Completed, report December 27, 1988
- Report: Approved by Office Director
- NTSB case key (mKey): 40527
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA87FA145
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/40527/pdf
- Page: https://openairdocs.org/ntsb/SEA87FA145

## Analysis

WHILE IN CRUISE AT 15000 FT MSL, PLT REQUESTED ATC DEVIATION AROUND TSTM SHOWN ON ACFT STORMSCOPE. AFTER PASSING, ATC GAVE VECTOR TO REJOIN AIRWAY.  PLT REQUESTED FURTHER DEVIATION AROUND ANOTHER CELL.  RADIO AND RADAR CONTACT WERE THEN LOST.  INVESTIGATION REVEALED CHARACTERISTICS OF LOW LEVEL INFLT BREAKUP DUE PILOT INDUCED OVERLOAD.  WX AND RADAR STUDY SHOW ACFT PENETRATED HEART OF TSTM OF AT LEAST MODERATE INTENSITY.

## Sequence of events

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

- In flight encounter with weather, cruise - normal
  - weather condition - thunderstorm,level ii (contributing factor)
  - weather condition - turbulence(thunderstorms) (contributing factor)
  - remedial action - attempted, pilot in command (contributing factor)
  - flight into known adverse weather - inadvertent, pilot in command (cause)
- Loss of control - in flight, cruise
- Airframe/component/system failure/malfunction, descent - uncontrolled
  - design stress limits of aircraft - exceeded, pilot in command (cause)
  - wing - overload
  - stabilizer - overload
- In flight collision with terrain/water, descent - uncontrolled

## Aircraft

- Registration: [N6326Y](https://openairdocs.org/deregistered/N6326Y-1991-02-01), registration cancelled 1991-02-01, S/N 21064336 (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: 21064336
- Engines: CONTINENTAL TSIO-520R 310 horsepower reciprocating
- Damage: Destroyed
- Fire: On-Ground
- Flight: Personal, Part 91
- Registered owner: Allan E. Bagge
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, February 17, 1987
- Departed: YYJ, VICTORIA
- Destination: GTF, GREAT FALLS, MT
- Flight plan: IFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 58; private; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 3, valid medical--w/ waivers/lim; seat: left; toxicology performed; flight hours: 2,700 total, 300 in this make and model, 36 in the last 90 days

## Weather

- Conditions: Day
- Wind: calm
- Visibility: 8 statute miles
- Lowest ceiling: 8,000 ft overcast
- Temperature: 72 °F
- Observed at: S06, 19 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 19870721082659A](https://openairdocs.org/incident/19870721082659A), Jul 21, 1987: Cessna T210N, Avery, ID, Destroyed, 2 fatal. Flew into a thunderstorm en route IFR. Lost control and aircraft came apart in the air. Was trying to deviate storm

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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