SEA96LA159

NTSB accident investigation · Cessna A188B · Pullman, WA · July 16, 1996

Accident · Serious injuriesLimited investigationFinal report
Date
July 16, 1996, 06:45 local (13:45 UTC)
Place
Pullman, WA
Injuries
1 serious
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N9336RCessna A188B
Weather
Visual (VMC) · Day
Status
Completed · report May 23, 1997
Report
Approved by Office Director
FAA report
19960716017919A
Case key
42421

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 pilot to maintain terrain clearance during a swath run. Factors relating to the accident were: unfavorable (variable) wind conditions, low airspeed, and uneven 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/waterManeuvering - aerial application
Weather condition - unfavorable windFactor
Weather condition - variable windFactor
Airspeed - lowPilot in commandFactor
Terrain condition - rough/unevenFactor
Clearance - not maintainedPilot in commandCause

Analysis

The pilot stated that he was spraying a field to the north and south with a light wind from the northwest and wind shear from different directions. He reported that as he was spraying south toward a small ridge, the airplane suddenly settled. The airplane collided with terrain, just below the top of a ridge, then it bounced and became airborne. The pilot tried to recover; however, the engine was no longer responding. The airplane then stalled and again collided with the terrain, flat on its belly. The pilot reported that there was no mechanical failure or malfunction with the airplane at the time of the accident.

Factual narrative

On July 16, 1996, at 0645 Pacific daylight time, a Cessna A188B, N9336R, registered to and operated by the pilot as a 14 CFR Part 137 aerial application flight, collided with the terrain while maneuvering near Pullman, Washington. Visual meteorological conditions prevailed at the time and no flight plan was filed for the local flight. The airplane was substantially damaged and the commercial pilot, the sole occupant, was seriously injured. The flight had departed from Pullman approximately ten minutes prior to the accident.

In a written statement, the pilot reported that he was spraying an insecticide north and south over a pea field with a light wind from the northwest, and wind shear conditions from different directions. The pilot stated that he began a spray run to the south, toward a small ridge, when that the airplane suddenly settled to the ground and the airplane collided with the ridge just below the top. The airplane bounced and became airborne. The pilot tried to recover, however, the engine was no longer responding. The pilot stated that the airplane "stalled" and again collided with the terrain flat on its belly.

After the accident, the pilot reported that there were no mechanical failures or malfunctions with the airplane at the time of the accident.

Aircraft

Registration
N9336R
Reported as
Cessna A188B
Category
Airplane
Serial number
18802243T
Airframe hours
4,400
Engine
Lycoming IO-540-S1A5, 300 horsepower, reciprocating
Damage
Substantial damage
Flight
Aerial application · Part 137
Registered owner
Sager, Arthur W.
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · March 31, 1996 · 400 hours before
Departed
PUW · Pullman, WA

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
56
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Front
Flight hours
2,800 total · 800 in this make and model · 2,700 as pilot in command · 350 in the last 90 days · 105 in the last 30 days · 5 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Visibility
20 statute miles
Lowest ceiling
None
Temperature
64 °F, dew point 46 °F
Altimeter
29.00 inHg
Observed at
PUW, 7 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.