CHI02CA248

NTSB accident investigation · Piper PA-25-235 · Ray, ND · August 14, 2002

Accident · No injuriesData collectionFinal report
Date
August 14, 2002, 08:50 local (13:50 UTC)
Place
Ray, ND
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N7634ZPiper PA-25-235
Weather
Visual (VMC) · Day
Status
Completed · report September 20, 2002
Report
Approved by Office Director
Parties
FAA-Fargo FSDO
FAA report
20020814021929A
Case key
55571

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 pilot inadvertently stalled the airplane during takeoff. A factor was the tailwind.

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/waterTakeoff
Stall - inadvertentPilot in commandCause
Weather condition - tailwindFactor

Analysis

The airplane sustained substantial damage when the airplane stalled during takeoff and impacted the terrain. The pilot reported he had returned to the airstrip in order to fix a plugged spray nozzle. He landed on the southwest runway of the grass airstrip. Once the nozzle was fixed he departed to the northeast. He reported he departed on the northeast runway due to a construction crane located at the southwest end of the runway. He estimated he departed with a 3-4 knot tailwind. He reported, "Upon liftoff, enough airspeed was not obtained to be able to clear the tree row. Once out of ground effect, a stall occurred which may have come from a downdraft + or the possibility of a spark plug fowling while idling to fix nozzle." He reported, "Upon realizing the stall, power was pulled back + had to land in grain field."

Factual narrative

On August 14, 2002, at 0850 central daylight time, a Piper PA-25-235, N7634Z, sustained substantial damage when the airplane stalled during takeoff and impacted the terrain in a wheat field near Ray, North Dakota. The commercial pilot was not injured. The 14 CFR Part 137 aerial application flight was departing from a private grass airstrip on a local flight. Visual meteorological conditions prevailed. No flight plan was filed.

The pilot reported he had returned to the airstrip in order to fix a plugged spray nozzle. He landed on the southwest runway of the grass airstrip. Once the nozzle was fixed he departed to the northeast. He reported he departed on the northeast runway due to a construction crane located at the southwest end of the runway. He estimated he departed with a 3-4 knot tailwind. He reported, "Upon liftoff, enough airspeed was not obtained to be able to clear the tree row. Once out of ground effect, a stall occurred which may have come from a downdraft + or the possibility of a spark plug fowling while idling to fix nozzle." He reported, "Upon realizing the stall, power was pulled back + had to land in grain field."

Aircraft

Registration
N7634Z
Reported as
Piper PA-25-235
Category
Airplane
Serial number
25-3766
Engine
Lycoming O-540-B, reciprocating
Damage
Substantial damage
Flight
Aerial application · Part 137
Operator
Jeffrey T. Knox
Registered owner
Jeffrey Knox
Airworthiness certificate
Special, Restricted (Special)
Departed
Ray, ND
Airport
XXX · Private Airstrip, runway 050

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
40
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2
Flight hours
2,300 total · 1,200 in this make and model · 2,100 as pilot in command · 20 in the last 30 days

Weather

Conditions
Visual (VMC) · Day

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 N7634Z · 1

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