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NTSB Reports is an independent research and search tool for public aviation accident and incident records. It brings NTSB aviation reports, structured fields, docket files, extracted figures, photos, videos, and update history into one searchable interface.

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NTSB Report

July 18, 1990 · Cessna 421C · N6089X

Lancaster, CA

Overview

Report Status

Probable Cause

Event Type

Accident

Date

July 18, 1990

Injury Outcomes

No injuries (5 uninjured)

Location

Lancaster, CA

Aircraft

Cessna 421C

Tail Number

N6089X

Operator

Pacifica

Injuries

None

Aircraft Damage

Substantial

NTSB Number

LAX90LA259

ERODED IGNITION SPARK PLUG ELECTRODES AND MAINTENANCE PERSONNEL NEGLECTING TO ADJUST SPARK PLUG ELECTRODES AND MAINTENANCE PERSONNEL NEGLECTING TO ADJUST SPARK PLUG GAP. THE ROUGH TERRAIN IN WHICH THE AIRCRAFT LANDED WAS A FACTOR IN THE ACCIDENT.

NTSB Probable Cause

THE ACCIDENT WAS ERODED IGNITION SPARK PLUG ELECTRODES AND MAINTENANCE PERSONNEL NEGLECTING TO ADJUST SPARK PLUG ELECTRODES AND MAINTENANCE PERSONNEL NEGLECTING TO ADJUST SPARK PLUG GAP. THE ROUGH TERRAIN IN WHICH THE AIRCRAFT LANDED WAS A FACTOR IN THE ACCIDENT.

Full Narrative

ERODED IGNITION SPARK PLUG ELECTRODES AND MAINTENANCE PERSONNEL NEGLECTING TO ADJUST SPARK PLUG ELECTRODES AND MAINTENANCE PERSONNEL NEGLECTING TO ADJUST SPARK PLUG GAP. THE ROUGH TERRAIN IN WHICH THE AIRCRAFT LANDED WAS A FACTOR IN THE ACCIDENT.

Flight

Event TypeAccident

Event Time09:33 PDT

Nearest AirportGen. William J Fox (0nm N)

Runway24

Runway Length5001 ft

Runway Width150 ft

Flight Plan FiledNone

Aircraft FireNo

Aircraft ExplosionNo

Aircraft

AircraftCessna 421C

Tail NumberN6089X

Aircraft CategoryAir

DamageSubstantial

OperatorPacifica

Operating RulePart 91

Engines2

Engine TypeReciprocating

Engine DetailsContinental · GTSI-O-520-L · Reciprocating · 375

Seats8

People & Injuries

Injury SummaryNo injuries (5 uninjured)

Fatal0

Serious0

Minor0

Uninjured5

Total5

Crew 1Age 67 · Second Class

Conditions

ConditionsVMC

LightDaylight

Wind240° @ 5 kt

Visibility40 sm

CeilingNone

Temperature / Dew Point0 C / 0 C

Altimeter0

Observation Time16:30

Weather SourceWFAC

500 – Data service is offline

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July 18, 1990 · Cessna 421C · N6089X

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