# NTSB SEA86FA245: Cessna 150M, N9250U, Carbonado, WA, September 12, 1986

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Field investigation · Final report
- Date: September 12, 1986, 14:39 local (21:39 UTC)
- Place: Carbonado, WA
- Coordinates: 47.010993, -121.979927 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=47.0110&lon=-121.9799&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 2 fatal
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 40305
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA86FA245
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/40305/pdf
- Page: https://openairdocs.org/ntsb/SEA86FA245

## Sequence of events

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

- Abrupt maneuver, maneuvering
  - reason for occurrence undetermined (contributing factor)
- In flight collision with object, maneuvering
  - object - wire,transmission (contributing factor)
  - clearance - inadequate, pilot in command (cause)
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

THE INSTRUCTOR AND PASSENGER DEPARTED ON EITHER AN INTRODUCTORY FLIGHT, INITIAL INSTRUCTIONAL FLIGHT, (OR COMBINATION THEREOF). DURING THE FLIGHT THE AIRCRAFT WAS FLOWN DOWN A CANYON WHICH THE INSTRUCTOR HAD FLOWN DOWN PREVIOUSLY. AS THE AIRCRAFT APPROACHED TRANSMISSION LINES SPANNING THE CANYON THE AIRCRAFT ENTERED AN UNEXPLAINED ABRUPT NOSE DOWN MANEUVER. THE PILOT IN COMMAND DID NOT/WAS UNABLE TO MAINTAIN ADEQUATE CLEARANCE WITH THE LINES AND COLLISION FOLLOWED. THE AIRCRAFT THEN DESCENDED OUT OF CONTROL TO THE BASE OF THE CANYON.

## Aircraft

- Registration: [N9250U](https://openairdocs.org/deregistered/N9250U-1989-03-15), registration cancelled 1989-03-15, S/N 15078200 (OpenAirDocs)
- Reported make and model: CESSNA 150M
- Registry model: [Cessna 150M](https://openairdocs.org/model/cessna-150m) (registry code 2071830) (OpenAirDocs)
- Category: Airplane
- Serial number: 15078200
- Airframe hours: 3096
- Engines: CONTINENTAL O-200A 100 horsepower reciprocating
- Damage: Destroyed
- Flight: Personal, Part 91
- Operator: Spanaflight
- Registered owner: William H. Raimer
- Airworthiness certificate: Standard, Utility
- Last inspection: Annual, June 24, 1986, 94 hours before
- Departed: 1S0, PUYALLUP, WA

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 23; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: right; toxicology performed; flight hours: 1,050 total, 185 in this make and model, 970 as pilot in command, 236 in the last 90 days, 84 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 260° at 3 knots
- Visibility: 30 statute miles
- Lowest ceiling: none
- Temperature: 70 °F, dew point 43 °F
- Altimeter: 29.00 inHg
- Observed at: TCM, 18 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 19860912044729A](https://openairdocs.org/incident/19860912044729A), Sep 12, 1986: Cessna 150M, Carbonado, WA, Destroyed, 1 fatal. The airplane struck transmission wires while flying down a canyon.

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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