SEA86FA245

NTSB accident investigation · Cessna 150M · Carbonado, WA · September 12, 1986

Accident · FatalField investigationFinal report
Date
September 12, 1986, 14:39 local (21:39 UTC)
Place
Carbonado, WA
Injuries
2 fatal
Damage
Destroyed
Phase of flight
Maneuvering
Aircraft
N9250UCessna 150M
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
FAA report
19860912044729A
Case key
40305

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Abrupt maneuverManeuvering
Reason for occurrence undeterminedFactor
In flight collision with objectManeuvering
Object - wire,transmissionFactor
Clearance - inadequatePilot in commandCause
In flight collision with terrain/waterDescent - 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
Reported as
Cessna 150M
Category
Airplane
Serial number
15078200
Airframe hours
3,096
Engine
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

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
23
Certificate
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.