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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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The investigative work and source records belong to the National Transportation Safety Board and the published investigation record. This site is not affiliated with or endorsed by the NTSB.

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NTSB Report

March 23, 1985 · Cessna 175 · N6710E

Sonora, TX

Overview

Report Status

Preliminary report

Event Type

Accident

Date

March 23, 1985

Injury Outcomes

No injuries (1 uninjured)

Location

Sonora, TX

Aircraft

Cessna 175

Tail Number

N6710E

Injuries

None

Aircraft Damage

Substantial

NTSB Number

FTW85LA170

THE ACFT WAS DESTROYED DURING A FORCED LANDING IN ROUGH TERRAIN, FOLLOWING AN ENG FAILURE IN-FLT. INVESTIGATION REVEALEDTHAT THE NO. 3 CONNECTING ROD FAILED DUE TO OIL STARVATION. THE ROD OIL PASSAGEWAY WAS FOUND CLOGGED WITH SLUDGE AND FINE METAL PARTICLES, AS WERE THE OIL FILTER AND SCREEN. IN ADDITION, SEVERAL BROKEN RINGS AND LEAKING INTAKE MANIFOLD HOSES WERE FOUND. THE ACFT WAS OPERATING ON AUTO GAS AND MARVEL MYSTERY OIL.

Full Narrative

THE ACFT WAS DESTROYED DURING A FORCED LANDING IN ROUGH TERRAIN, FOLLOWING AN ENG FAILURE IN-FLT. INVESTIGATION REVEALEDTHAT THE NO. 3 CONNECTING ROD FAILED DUE TO OIL STARVATION. THE ROD OIL PASSAGEWAY WAS FOUND CLOGGED WITH SLUDGE AND FINE METAL PARTICLES, AS WERE THE OIL FILTER AND SCREEN. IN ADDITION, SEVERAL BROKEN RINGS AND LEAKING INTAKE MANIFOLD HOSES WERE FOUND. THE ACFT WAS OPERATING ON AUTO GAS AND MARVEL MYSTERY OIL.

Flight

Event TypeAccident

Event Time13:00 CST

Nearest AirportSONORA (23nm NW)

Runway0

Runway Length0

Runway Width0

Flight Plan FiledVFR

Aircraft FireNo

Aircraft ExplosionNo

Aircraft

AircraftCessna 175

Tail NumberN6710E

Aircraft CategoryAir

DamageSubstantial

Operating RulePart 91

Engines1

Engine TypeReciprocating

Engine DetailsContinental · GO-300-A · Reciprocating · 175

Seats4

People & Injuries

Injury SummaryNo injuries (1 uninjured)

Fatal0

Serious0

Minor0

Uninjured1

Total1

Crew 1Age 41 · Third Class

Conditions

ConditionsVMC

LightDaylight

Wind320° @ 10 kt, gusting 12 kt

Visibility15 sm

CeilingNone

Temperature / Dew Point10 C

Altimeter0

Weather SourcePILO

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March 23, 1985 · Cessna 175 · N6710E

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