ANC93LA021

NTSB accident investigation · Piper PA-18 · Anchorage, AK · December 13, 1992

Accident · No injuriesLimited investigationFinal report
Date
December 13, 1992, 10:45 local (14:45 UTC)
Place
Anchorage, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N1954PPiper PA-18
Weather
Visual (VMC) · Day
Status
Completed · report September 28, 1993
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19921213049919A
Case key
5856

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 NTSB’s determination of the probable cause, and any contributing factors.

The total loss of engine power due to a short in the voltage regulator, and the lack of suitable terrain for the pilot to make the forced landing on.

Analysis

During the takeoff climb the pilot smelled what he thought was burning electrical wires, and the cockpit filled with smoke. The engine lost all power almost immediately. The off airport forced landing on the mud flats resulted in substantial damage to the airplane when it nosed over. Examination found that the voltage regulator had shorted out. This caused a brief localized fire which burned and shorted out the magneto 'p' leads, causing the engine to stop running.

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.

Airframe/component/system failure/malfunctionTakeoff - initial climb
Electrical system,voltage regulator - shortedCause
Loss of engine powerTakeoff - initial climb
Ignition system,magneto grounding lead (p-lead) - burnedCause
Forced landingDescent - emergency
Nose overLanding - flare/touchdown
Terrain condition - none suitableCause

Aircraft

Registration
N1954P
Reported as
Piper PA-18
Category
Airplane
Serial number
18-4181
Engine
Lycoming O-320, 150 horsepower, reciprocating
Damage
Substantial damage
Fire
In-Flight
Flight
Personal · Part 91
Operator
Smith, Hugh
Registered owner
Smith, Hugh
Airworthiness certificate
Standard, Normal
Last inspection
Annual · August 6, 1992 · 7 hours before
Departed
Z41 · Anchorage, AK
Airport
Z41 · Lake Hood, runway 31, 2,200 × 50 ft, gravel

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
60
Certificate
Commercial
Airplane ratings
Single-engine land, Single-engine sea
Medical
Class 3, Expired
Seat
Front
Flight hours
6,000 total · 2,000 in this make and model · 6,000 as pilot in command · 50 in the last 90 days · 15 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
160° at 3 knots
Visibility
60 statute miles
Lowest ceiling
9,000 ft broken
Temperature
28 °F, dew point 27 °F
Altimeter
28.00 inHg
Observed at
ANC, 2 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 N1954P · 1

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