CHI94LA286

NTSB accident investigation · Snow S2C · Leslie, MO · August 17, 1994

Accident · No injuriesLimited investigationFinal report
Date
August 17, 1994, 09:48 local (14:48 UTC)
Place
Leslie, MO
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N9498RSnow S2C
Weather
Visual (VMC) · Day
Status
Completed · report January 25, 1995
Report
Approved by Office Director
FAA report
19940817021669A
Case key
9643

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 separation of the cylinder and subsequent oil leak. A factor to the accident was the pilot's restricted visual outlook.

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(total) - mech failure/malfCruise
Engine assembly,cylinder - separationCause
Fluid,oil - leakCause
Visual lookout - restrictedFactor
Forced landingDescent - emergency
In flight collision with objectApproach
Object - tree(s)
In flight collision with terrain/waterDescent - uncontrolled
Terrain condition - ground

Analysis

During cruise flight the #2 cylinder (head) separated and oil leaking from the fracture covered the windshield and side windows of the airplane restricting the pilot's visibility. He was unable to avoid trees on approach during the forced landing.

Factual narrative

On August 17, 1994, at 0948 central daylight time, a Snow S2C, N9498R, registered to Farmers Air Service, Inc., of Houston, Missouri, and operated by a commercial pilot, experienced a loss of engine power while in cruise flight. During a forced landing the airplane impacted a tree and the terrain near Leslie, Missouri. The airplane sustained substantial damage. The pilot reported no injuries. The 14 CFR Part 91 ferry flight was operating in visual meteorological conditions. No flight plan was on file. The flight departed Pekin, Illinois, with the intended destination of Houston, Missouri, at 0800.

The airplane was being repositioned between aerial application jobs.

The pilot stated that while in cruise flight the engine lost power and oil covered the windshield and side door windows hampering his visibility. He was unable to see to avoid trees on the approach during a forced landing.

Subsequent examination of the airplane engine revealed that the #2 cylinder (head) had separated through a crack at the parting threads between the cylinder head and cylinder barrel. Lubricating oil was released through the open cylinder and valve mechanism into the cooling air flow around the cylinder and cylinder head.

Aircraft

Registration
N9498R
Reported as
Snow S2C
Category
Airplane
Serial number
1138-C
Engine
P&W R-985-14B, 450 horsepower, reciprocating
Damage
Substantial damage
Flight
Ferry · Part 91
Registered owner
Farmers Air Service, Inc.
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · August 2, 1994 · 36 hours before
Departed
C15 · Pekin, IL
Destination
M48 · Houston, MO

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
65
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Center
Flight hours
22,095 total · 2,800 in this make and model · 21,980 as pilot in command · 105 in the last 90 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
0° at 3 knots
Visibility
15 statute miles
Lowest ceiling
None
Temperature
81 °F, dew point 45 °F
Altimeter
29.00 inHg

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.