ANC01LA141

NTSB accident investigation · Jacobs KE-1-A · Willow, AK · September 1, 2001

Accident · No injuriesLimited investigationFinal report
Date
September 1, 2001, 15:30 local (23:30 UTC)
Place
Willow, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N24KJJacobs KE-1-A
Weather
Visual (VMC) · Day
Status
Completed · report June 3, 2002
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
FAA-AL-ANC FSDO 03
Case key
53449

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

A loss of engine power during cruise flight for an undertermined reason.

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 powerCruise
Reason for occurrence undeterminedCause
Forced landingEmergency descent/landing
On ground/water collision with objectEmergency descent/landing
Object - tree(s)

Analysis

The private certificated pilot departed on a personal cross-country flight in a float-equipped experimental/homebuilt airplane. The airplane was one of two airplanes headed for a remote lake. The pilot said that during cruise flight about 2,300 feet msl, the engine lost power, decreasing from 2,350 to about 1,500 RPM. She activated the engine boost pump, and the engine RPM increased, but then decreased again. The pilot said she made several attempts to regain engine RPM by the use of the boost pump and engine throttle, but the engine quit. The pilot selected a small lake for an emergency landing, but the airplane touched down in an area of soft, swampy terrain, about 50 yards short of the lake. During the landing roll, the left wing collided with a tree, sustaining damage to the wing spar.

During repairs of the airplane, the operator reported that no mechanical malfunction was found.

Factual narrative

On September 1, 2001, about 1530 Alaska daylight time, a float-equipped experimental/homebuilt Jacobs KE-1-A airplane, N24KJ, sustained substantial damage during a forced landing, about 4.4 miles north of Willow, Alaska. The airplane was being operated as a visual flight rules (VFR) cross-country personal flight when the accident occurred. The airplane was operated by the pilot. The private certificated pilot, the sole occupant, was not injured. Visual meteorological conditions prevailed. The flight originated at the Lake Hood Seaplane Base, Anchorage, Alaska, at 1500.

During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC), on September 6, 2001, the pilot reported that the accident airplane was one of two airplanes flying from Lake Hood to Stephan Lake, located about 30 miles northeast of Talkeetna, Alaska. The pilot said that during cruise flight about 2,300 feet msl, the engine lost power, decreasing from 2,350 to about 1,500 RPM. She activated the engine boost pump, and the engine RPM increased, but then decreased again. The pilot said she made several attempts to regain engine RPM by the use of the boost pump and engine throttle, but the engine quit. The pilot selected a small lake for an emergency landing, but the airplane touched down in an area of soft, swampy terrain, about 50 yards short of the lake. During the landing roll, the left wing collided with a tree, sustaining damage to the wing spar.

On March 7, 2002, in a telephone conversation with the NTSB IIC, the owner/operator of the airplane reported that following recovery of the airplane, it underwent repairs. During the repair, the operator said that no mechanical malfunction was found.

Aircraft

Registration
N24KJ
Reported as
Jacobs KE-1-A
Category
Airplane, amateur-built
Serial number
KE1A1
Airframe hours
2,903
Engine
Continental IO-346, 165 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Valerie A. Van Brocklin
Registered owner
Karl S. Johnstone
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Annual · May 16, 2001 · 20 hours before
Departed
PALH · Anchorage, AK
Destination
Stephan Lake, AK

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
Injuries
None
Certificate
Private
Airplane ratings
Single-engine sea, Single-engine land
Medical
Class 3, Valid Medical--w/ waivers/lim
Last flight review
May 22, 2001
Seat
Front
Flight hours
495 total

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
30 statute miles
Lowest ceiling
6,000 ft overcast
Temperature
61 °F
Altimeter
29.25 inHg