ANC94LA121

NTSB accident investigation · Cessna 172 · Wrangell, AK · August 18, 1994

Accident · No injuriesLimited investigationFinal report
Date
August 18, 1994, 11:06 local (19:06 UTC)
Place
Wrangell, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N78428Cessna 172
Weather
Visual (VMC) · Day
Status
Completed · report May 9, 1995
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19940818021799A
Case key
2553

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

Loss of engine power for undertermined reasons and the lack of a suitable landing area.

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) - nonmechanicalCruise - normal
Reason for occurrence undeterminedCause
Forced landingEmergency descent/landing
On ground/water collision with objectEmergency descent/landing
Terrain condition - none suitableCause
Dragged wing,rotor,pod,float or tail/skidLanding - roll

Analysis

The airplane experienced a partial power loss during cruise flight. The pilot was able to maintain partial power by pumping the throttle. He selected a forced landing area and during the landing roll the right wing hit a 'dead tree snag.' The reason for the engine power problem was undetermined.

Factual narrative

On August 18, 1994 at 1106 Alaska daylight time, a wheel equipped Cessna 172 airplane, N78428 experienced a partial power failure during cruise flight and was forced to land at Vande Put Point, near Thomas Bay, Alaska. The personal flight, operating under 14 CFR Part 91, departed Petersburg, Alaska, and the destination was Juneau, Alaska. Visual meteorological conditions prevailed and a VFR flight plan was filed. The student pilot, the sole occupant, was not injured and the airplane was substantially damaged.

According to the student pilot, he was able to keep the engine running partially by pumping the throttle. He attempted to select the left and right fuel tanks but the engine would not run. He finally selected fuel tanks "both" position and accomplished a magneto check. He stated the magnetos checked fine. He continued to pump the throttle to maintain some engine power. He executed a forced landing on the beach and during the landing roll the right wing hit a dead tree snag damaging the right wing.

Examination of the airplane did not show any reason for the power loss.

Aircraft

Registration
N78428
Reported as
Cessna 172
Category
Airplane
Serial number
17257612
Airframe hours
2,829
Engine
Lycoming O-320-E2D, 150 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Tullis, John L.
Airworthiness certificate
Standard, Normal
Departed
PSG · Petersburg, AK
Destination
JNU · Juneau, AK
Flight plan
VFR

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
71
Certificate
Student
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
73 total · 61 in this make and model · 11 in the last 90 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Visibility
20 statute miles
Temperature
61 °F, dew point 54 °F
Altimeter
30.00 inHg
Observed at
PSG, 12 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.

Other investigations on N78428 · 1

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