MIA97LA190

NTSB accident investigation · Schweizer G-164B · Edwards, MS · June 20, 1997

Accident · No injuriesLimited investigationFinal report
Date
June 20, 1997, 18:40 local (23:40 UTC)
Place
Edwards, MS
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N6816QSchweizer G-164B
Weather
Visual (VMC) · Day
Status
Completed · report October 31, 1997
Report
Approved by Office Director
FAA report
19970620018449A
Case key
38293

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

failure of the distributor drive gear in the right magneto, resulting in loss of engine power and a forced landing. The lack of suitable terrain for a forced landing was a related factor.

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.

Loss of engine power(partial) - mech failure/malfManeuvering - aerial application
Ignition system,magneto - failure,partialCause
Forced landingEmergency descent/landing
On ground/water collision with objectEmergency landing
Terrain condition - none suitableFactor
Object - tree(s)

Analysis

The engine lost power as the pilot pulled up from an aerial application run. The pilot immediately made a forced landing in a field and was unable to stop the aircraft before it collided with trees at the end of the field. Postcrash examination of the engine showed the right magneto distributor drive gear had several gear teeth missing, and the gear would occasionally not drive the distributor. This caused the magneto to lose timing with the engine. The pilot said he did not have time to cycle the magneto switches before making a forced landing.

Factual narrative

On June 20, 1997, about 1840 central daylight time, a Schweizer G164B, N6816Q, registered to Grays Flying Service, Inc., collided with trees while making a forced landing following loss of engine power at Edwards, Mississippi, while on a Title 14 CFR Part 137 aerial application flight. Visual meteorological conditions prevailed at the time and no flight plan was filed. The aircraft received substantial damage and the commercial-rated pilot was not injured. The flight originated from Edwards, the same day, about 1830.

The pilot stated during pull-up after an application run, the engine lost power. He made a forced landing in a soybean field and could not stop before colliding with trees at the end of the field.

Postcrash examination of the engine by an FAA inspector showed the right magneto had malfunctioned. The magneto was replaced and the engine was operated to full power with no further evidence of failure or malfunction. Examination of the right magneto showed the distributor drive gear had several gear teeth missing. The gear would not turn the distributor on occasion, causing the magneto to lose timing with the engine.

Aircraft

Registration
N6816Q
Reported as
Schweizer G-164B
Category
Airplane
Serial number
320B
Airframe hours
5,510
Engine
P&W R-985-14B, 450 horsepower, reciprocating
Damage
Substantial damage
Flight
Aerial application · Part 137
Registered owner
Grays Flying Service, Inc.
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · March 3, 1997 · 50 hours before
Departed
M16

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
47
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Center
Flight hours
11,000 total · 5,000 in this make and model · 11,000 as pilot in command · 50 in the last 90 days · 45 in the last 30 days · 10 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Variable at 5 knots
Visibility
9 statute miles
Lowest ceiling
None
Temperature
88 °F, dew point 72 °F
Altimeter
29.00 inHg
Observed at
JAN, 21 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.

Other investigations on N6816Q · 2

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