SEA97LA209

NTSB accident investigation · de Havilland DHC-1 · Winlock, WA · September 13, 1997

Accident · Serious injuriesLimited investigationFinal report
Date
September 13, 1997, 16:00 local (23:00 UTC)
Place
Winlock, WA
Injuries
1 serious
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N6004Ade Havilland DHC-1
Weather
Visual (VMC) · Day
Status
Completed · report May 4, 1998
Report
Approved by Office Director
FAA report
19970913045429A
Case key
42690

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's failure to attain proper alignment during touchdown and failure to maintain directional control. A wet runway was a 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 control - on ground/waterLanding - roll
Proper alignment - not attainedPilot in commandCause
Airport facilities,runway/landing area condition - wetFactor
Directional control - not maintainedPilot in commandCause
On ground/water collision with objectLanding - roll
Object - hangar/airport building

Analysis

The pilot reported that while on final approach the airplane was too high. The pilot slipped the airplane to reduce altitude and held that attitude until a few feet above the runway and at the point of flare. The pilot stated that the airplane continued to descend in the flare and touched down still in the slip attitude. The airplane bounced and the pilot added power. The airplane was pointed to the right of runway heading and the pilot was unable to maintain directional control as the airplane traveled off the runway into the wet grass. The pilot reduced the power and applied heavy breaking action, however, the airplane continued and collided with a hangar.

Factual narrative

On September 13, 1997, at 1600 Pacific daylight time, a DeHavilland DHC-1, N6004A, registered to and operated by the pilot as a 14 CFR Part 91 personal flight, collided with a hangar after the pilot was unable to maintain directional control during the landing roll at a private airstrip near Winlock, Washington. Visual meteorological conditions prevailed at the time and no flight plan was filed. The airplane was substantially damaged and the private pilot, the sole occupant, was seriously injured. The flight had departed from another private airstrip near Napavine, Washington, approximately 30 minutes prior to the accident.

In a written statement, the pilot reported that while on final approach, the airplane's altitude was high. The pilot stated that she slipped the airplane to reduce altitude. The slip was held until a few feet of touchdown and at the point of flaring the airplane. The pilot stated that during the flare, the airplane continued to descend and was still in a slip attitude at touchdown. After the airplane touched down, it bounced. The pilot stated that she added power, however, the airplane was pointed to the right of runway heading and she was unable to maintain directional control. The power was reduced and the pilot applied heavy braking action. The airplane continued to travel off the runway, in the wet grass, and collided with a hangar.

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

Aircraft

Registration
N6004A
Reported as
de Havilland DHC-1
Category
Airplane
Serial number
C1-0509
Airframe hours
7,800
Engine
Bristol GIPSY, 145 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Maralyn G. Tuckness
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Annual · May 1, 1997 · 19 hours before
Departed
Napavine, WA
Airport
Pilots Pasture, runway 27, 2,200 × 90 ft, grass/turf

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
59
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Front
Flight hours
544 total · 378 in this make and model · 501 as pilot in command

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
4,200 ft broken
Temperature
63 °F, dew point 55 °F
Altimeter
29.00 inHg
Observed at
KLS, 23 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.