LAX88FA297

NTSB accident investigation · Mooney M20J · Inyokern, CA · August 24, 1988

Accident · FatalField investigationFinal report
Date
August 23, 1988, 20:58 local (Aug 24, 1988, 03:58 UTC)
Place
Inyokern, CA
Injuries
1 fatal
Damage
Destroyed
Phase of flight
Enroute
Aircraft
N5769YMooney M20J
Weather
Visual (VMC) · Night/dark
Status
Completed · report July 9, 1990
Report
Approved by Office Director
FAA report
19880823035329A
Case key
25857

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

Pilots inflight loss of control after encountering a level four thunderstorm on a night VFR cross country. Contributing to the accident was the pilot's failure to obtain a preflight weather briefing.

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 encounter with weatherCruise - normal
Light condition - dark nightFactor
Weather condition - thunderstormFactor
Weather condition - rainFactor
Weather condition - turbulence(thunderstorms)Factor
Preflight planning/preparation - poorPilot in commandFactor
Preflight briefing service - not obtainedPilot in commandFactor
Flight into known adverse weather - attemptedPilot in commandCause
In-flight planning/decision - poorPilot in commandFactor
In flight collision with terrain/waterDescent - uncontrolled
Aircraft handling - not maintainedPilot in commandCause

Analysis

Weather reports from a nearby airport and witness observations indicate that a level 4 thunderstorms was near the accident site as the acft approached. The plt did not obtain a preflt wx briefing for this night VFR cross country. The wx information available at the time he departed clearly noted the thunderstorm with heavy rain and lightening present on his route. Radar data showed the acft tracking along a highway with the mode c reporting erratic altitude jumps. The radar data showed the acft turn right tightly and descend at a rapid rate. Evidence at the site showed the acft contacted the ground in a 60 degree right bank turn with the nose down at about 40 degrees and at a high rate of speed. The plt was not current for night flt.

Aircraft

Registration
N5769Y
Reported as
Mooney M20J
Category
Airplane
Serial number
24-1496
Airframe hours
1,632
Engine
Lycoming IO-360-A3B6D, 200 horsepower, reciprocating
Damage
Destroyed
Flight
Personal · Part 91
Operator
Flightworks Aviation, Inc.
Registered owner
Adam R. Felde
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · July 30, 1988 · 32 hours before
Departed
VNY · Van Nuys, CA
Destination
MMH · Mammoth, 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
46
Certificate
Private
Airplane ratings
Single-engine land, Multi-engine land
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Left
Toxicology
Performed
Flight hours
488 total · 297 in this make and model · 260 as pilot in command · 13 in the last 90 days · 3 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Night/dark
Wind
90° at 9 knots
Visibility
10 statute miles
Lowest ceiling
8,000 ft overcast
Temperature
81 °F, dew point 75 °F
Altimeter
30.00 inHg
Observed at
NID, 14 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.