SEA88LA148

NTSB accident investigation · Weatherly 620 · Wilbur, WA · August 8, 1988

Accident · No injuriesLimited investigationFinal report
Date
August 8, 1988, 11:30 local (18:30 UTC)
Place
Wilbur, WA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N4603GWeatherly 620
Weather
Visual (VMC) · Day
Status
Completed · report September 29, 1989
Report
Approved by Office Director
FAA report
19880808031469A
Case key
40862

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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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
Fluid,fuel - starvationCause
Fuel system,pump - deterioratedCause
Fuel system,electric boost pump - deterioratedCause
Maintenance,inspection - inadequateCompany maintenance personnelFactor
Forced landingDescent - emergency
In flight collision with terrain/waterLanding
Terrain condition - rough/unevenFactor

Analysis

The pilot reported that an engine power loss occurred during an aerial application maneuver. The pilot made a forced landing in rough terrain. Examination of the engine revealed deteriorated seals in the engine driven fuel pump. Exam of the electric fuel pump disclosed similarly deteriorated seals.

Aircraft

Registration
N4603G
Reported as
Weatherly 620
Category
Airplane
Serial number
1506
Engine
P&W R-985, 450 horsepower, reciprocating
Damage
Substantial damage
Flight
Aerial application · Part 137
Registered owner
Dennis L. Buddrius
Airworthiness certificate
Special, Restricted (Special)

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
49
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Center
Flight hours
9,000 total · 6,000 in this make and model · 250 in the last 90 days · 90 in the last 30 days · 4 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
180° at 10 knots
Visibility
40 statute miles
Lowest ceiling
None
Temperature
70 °F

FAA reports on this event · 1

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