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Aviation safety reports, made easier to study

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October 27, 2022 · Piper PA-22-160 · N8119D

Kenai, AK

Overview

Report Status
Final with probable cause
Event Type
Accident
Date
October 27, 2022
Injury Outcomes
No injuries (2 uninjured)
Location
Kenai, AK
Aircraft
Piper PA-22-160 (1957)
Tail Number
N8119D
Operator
Ham Keith W
Injuries
None
Aircraft Damage
Substantial
NTSB Number
ANC23LA005

Shortly after takeoff, the engine lost power and the propellor began to windmill. The flight instructor conducted emergency procedures but was unable to regain engine power. The flight instructor determined that they did not have sufficient altitude to make it back to the airport and he selected a road on which to make a forced landing. To avoid a car, the pilot turned slightly towards the edge of the road and was pulled into a snow berm, where the aircraft came to a full stop. The airplane sustained substantial damage to the right wing and fuselage. A postaccident examination of the engine found the crankshaft drive gear bolt was missing and the gear alignment dowel pin on the crankshaft was broken. The missing bolt was not found during the postaccident examination. The engine was last disassembled in 1983 and the accessory gearbox was opened for an oil pump rebuild in 2006; the investigation was not able to identify how long the engine had operated with the bolt missing. The crankshaft drive gear drives the accessory gear box and, according to the engine manufacturer, failure of the gear or the gear attaching parts would result in complete engine stoppage.

NTSB Probable Cause

Improper installation of the crankshaft drive gear by maintenance personnel, who failed to install all required hardware, resulting in an in-flight engine failure.

Full Narrative

On October 26, 2022, about 1656 Alaska daylight time, a Piper PA-22-160, N8119D, sustained substantial damage when it was involved in an accident in Kenai, Alaska. The flight instructor and the pilot receiving instruction, who was a private pilot, sustained no injuries. The airplane was operated by the instructor pilot as a Title 14 Code of Federal Regulations Part 91 general aviation flight. The purpose of the flight was to conduct pilot training. The airplane took off from the Kenai Municipal Airport, Kenai. Shortly after takeoff, the engine lost total power and the propellor began to windmill. The flight instructor conducted emergency procedures but was unable to regain engine power. The flight instuctor informed the airport tower of their loss of engine power and was cleared to land back at the airport. He determined that they did not have sufficient altitude to make it back to the airport and landed on a road about 2 miles southeast of the airport. During the landing, to avoid a car, the flight instructor turned slightly towards the edge of the road and was pulled into a snow berm where the airplane came to rest. The airplane sustained substantial damage to the right wing and fuselage. A postaccident examination of the engine revealed that the crankshaft drive gear was missing a bolt and a broken dowel pin on the crankshaft. The missing bolt was not found during the postaccident examination. The engine was last disassembled in 1983. The accessory gearbox was opened for an oil pump rebuild in 2006. The crankshaft drive gear drives the accessory gear box and, according to the engine manufacturer, failure of the gear or the gear attaching parts would result in complete engine stoppage.

Flight

Event TypeAccident
Event Time16:56 AKDT
Nearest Airport0nm
Flight Plan FiledVFR
Flight Plan ActivatedUnknown
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftPiper PA-22-160
Tail NumberN8119D
Aircraft CategoryAir
DamageSubstantial
OperatorHam Keith W
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-360-A4A · Reciprocating · 180
Seats4

People & Injuries

Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 31 · Third Class · None
Crew 2Age 17 · Third Class · None

Conditions

ConditionsVMC
LightDaylight
WindCalm
CeilingNone
Temperature / Dew Point25 F / 0 F
Altimeter0
Observation Time16:30
Weather SourcePILO

Appendix: Source Data