LAX85FA030

NTSB accident investigation · Cessna 150M · Lee Vining, CA · October 21, 1984

Accident · Serious injuriesField investigationFinal report
Date
October 21, 1984, 13:00 local (20:00 UTC)
Place
Lee Vining, CA
Injuries
2 serious
Damage
Destroyed
Phase of flight
Maneuvering
Aircraft
N704EQCessna 150M
Weather
Visual (VMC) · Dawn
Status
Completed
Report
Approved by Office Director
FAA report
19841021073239A
Case key
24430

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.

In flight collision with terrain/waterManeuvering - turn to reverse direction
Terrain condition - mountainous/hillyFactor
Weather condition - downdraftFactor
Preflight planning/preparation - poorPilot in commandCause
Procedures/directives - improperPilot in commandCause
Lack of familiarity with geographic areaPilot in commandFactor
Lowering of flaps - improperPilot in commandFactor
Proper altitude - not obtainedPilot in commandCause

Analysis

The acft crashed into a mountain during a VFR x-country. The acft was approaching the mountain ridge on the lee side anddid not clear the top of the ridge. The plt said that when he saw the acft was not going to clear the ridge he lowered 10 degrees of flaps and started a left turn. The left wing hit the side of the ridge and the nose of the acft hit a large rock. The acft then cartwheeled and came to a stop right side up. The aviation weather handbook states in part that the downdraft on the lee side of a mountain may drive an acft into the mountainside. It recommends a climb well in advance of the mountain to an alt in excess of the terrain to be cleared.

Aircraft

Registration
N704EQ
Reported as
Cessna 150M
Category
Airplane
Serial number
14078556
Airframe hours
3,241
Engine
Continental O-200-A, 100 horsepower, reciprocating
Damage
Destroyed
Flight
Personal · Part 91
Registered owner
General Air Services, Inc.
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · October 12, 1984 · 4 hours before
Departed
022 · Columbia, CA
Destination
024 · Lee Vining, CA

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
48
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 3, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
30 total · 27 in this make and model · 30 as pilot in command · 21 in the last 90 days · 14 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Dawn
Wind
360° at 30 knots, gusting 35
Visibility
25 statute miles
Lowest ceiling
None
Temperature
39 °F

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.