LAX91LA383

NTSB accident investigation · Cessna 172 · Arroyo Grande, CA · September 5, 1991

Accident · FatalLimited investigationFinal report
Date
September 4, 1991, 22:49 local (Sep 5, 1991, 05:49 UTC)
Place
Arroyo Grande, CA
Injuries
3 fatal, 1 serious
Damage
Destroyed
Phase of flight
Maneuvering
Aircraft
N739YGCessna 172
Weather
Instrument (IMC) · Night/dark
Status
Completed · report May 5, 1993
Report
Approved by Office Director
FAA report
19910905037959A
Case key
27350

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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Probable cause

The pilot's failure to maintain a proper altitude, and continued flight into instrument meteorological conditions.

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 objectManeuvering
Terrain condition - mountainous/hillyFactor
Weather condition - fogFactor
Light condition - nightFactor
Altitude - improperPilot in commandCause
Vfr flight into imc - attemptedPilot in commandCause
Judgment - poorPilot in commandCause
Weather evaluation - poorPilot in commandCause
Overconfidence in personal abilityPilot in commandFactor
In flight collision with terrain/waterDescent - uncontrolled

Analysis

The 100 hour private pilot received a limited preflight weather briefing for a proposed night flight in a rental aircraft. He was advised that AIRMET sierra was in effect, which called for general IFR conditions over his route of flight. Additionally, there was a SIGMET for thunderstorm activity along the route. He arrived at his destination late in the evening. Witnesses stated the weather was very foggy with about 1/2 mile visibility. The aircraft collided with trees and terrain near the destination airport.

Aircraft

Registration
N739YG
Reported as
Cessna 172
Category
Airplane
Serial number
17270908
Engine
Lycoming O-320-H2AD, 160 horsepower, reciprocating
Damage
Destroyed
Fire
On-Ground
Flight
Personal · Part 91
Operator
Novo Helicopters, Inc.
Registered owner
Novo Helicopters, Inc.
Last inspection
Unknown · January 2, 2000
Departed
LGB · Long Beach, CA
Destination
L52 · Oceano, 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
23
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--no waivers/lim.
Flight hours
100 total

Weather

Conditions
Instrument (IMC) · Night/dark
Wind
280° at 4 knots
Visibility
1 statute miles
Observed at
SMR, 12 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.