LAX91LA321

NTSB accident investigation · Piper PA 18-135 · Gerlach, NV · July 21, 1991

Accident · No injuriesLimited investigationFinal report
Date
July 21, 1991, 10:00 local (17:00 UTC)
Place
Gerlach, NV
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N9977QPiper PA 18-135
Weather
Visual (VMC) · Day
Status
Completed · report May 27, 1993
Report
Approved by Office Director
FAA report
19910721029119A
Case key
27299

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 failure of the pilot to maintain adequate terrain clearance by the selection of an inappropriate cruise altitude resulting in an in flight collision with terrain.

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/waterCruise
Proper altitude - not selectedPilot in commandCause
Clearance - not maintainedPilot in commandCause

Analysis

In both his written and verbal statements the pilot said that he encountered a 'downdraft' while flying near Gerlach, Nevada. The pilot stated that the downdraft was encountered just as the aircraft overflew a small ridge at low altitude and he could not arrest the rate of descent prior to colliding with the ground in the valley beyond. In his written report of the accident, the pilot said that there was no mechanical malfunction of the aircraft. The closest weather reporting station was reporting winds of less than five knots. The pilot did not indicate that high winds or other unusual meteorological conditions were involved in the accident circumstances.

Aircraft

Registration
N9977Q
Reported as
Piper PA 18-135
Category
Airplane
Serial number
18-3575
Engine
Lycoming O-320, 160 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Gregory Powning
Registered owner
Gregory Powning
Last inspection
Unknown · January 2, 2000
Departed
NV18 · Reno, NV

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
42
Certificate
Private
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 3, Valid Medical--w/ waivers/lim
Flight hours
775 total · 500 in this make and model · 740 as pilot in command · 12 in the last 90 days · 4 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
180° at 4 knots
Visibility
30 statute miles
Lowest ceiling
None

FAA reports on this event · 1

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

Other investigations on N9977Q · 1

Matched to the same aircraft by N-number and date.