SEA95LA050

NTSB accident investigation · Beech S-35 · Wolf Point, MT · February 11, 1995

Accident · No injuriesLimited investigationFinal report
Date
February 10, 1995, 17:53 local (Feb 11, 1995, 00:53 UTC)
Place
Wolf Point, MT
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N8828MBeech S-35
Weather
Visual (VMC) · Dusk
Status
Completed · report September 24, 1995
Report
Approved by Office Director
FAA report
19950210030809A
Case key
42109

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 loss of power due to lost oil pressure and a failed connecting rod. Factors include fence posts and dusk lighting conditions which limited visibility.

Analysis

The pilot noted a loss of oil pressure, which he monitored. The engine began running roughly after one to three minutes, and he elected to make a forced landing. The pilot stated that he chose a level spot for the forced landing, but it was getting dark and he didn't see a barbed wire fence across the landing site. He did not see the fence posts until flaring for a landing. The right wing struck two fence posts, causing substantial damage. Engine teardown revealed that a connecting rod failed. The engine had five hours since major overhaul.

Factual narrative

On February 10, 1995, approximately 1753 mountain standard time, a Beech S-35, N8828M, sustained substantial damage during a forced landing after a loss of engine power while en route to Wolf Point, Montana. The commercial pilot, who was the sole occupant of the aircraft, was uninjured. The flight, which was a non-scheduled cargo flight operated under 14CFR135, had departed Glasgow, Montana about ten minutes earlier. There was no fire and no report of an ELT actuating. Visual meteorological conditions prevailed at the time of the flight.

The pilot noted a loss of oil pressure, but the engine continued to run smoothly. About one to three minutes after the loss of oil pressure, the engine started knocking and the pilot shut it down. An inspection by FAA inspectors noted that the number six connecting rod had failed. The engine had five hours since major overhaul.

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 - normal
Fluid,oil - no pressureCause
Engine assembly,connecting rod - failure,totalCause
Forced landingEmergency descent/landing
On ground/water collision with objectEmergency descent/landing
Object - fence postFactor
Light condition - duskFactor

Aircraft

Registration
N8828M
Reported as
Beech S-35
Category
Airplane
Serial number
D-7349
Airframe hours
9,590
Engine
Continental IO-520-BA10B, 285 horsepower, reciprocating
Damage
Substantial damage
Flight
Part 135
Registered owner
Richland Aviation
Airworthiness certificate
Standard, Normal
Last inspection
Annual · February 2, 1995 · 1 hours before
Departed
GGW · Glasgow, MT
Destination
OLF
Flight plan
VFR

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
50
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
3,691 total · 476 in this make and model · 3,398 as pilot in command · 65 in the last 90 days · 30 in the last 30 days

Weather

Conditions
Visual (VMC) · Dusk
Wind
350° at 20 knots, gusting 30
Visibility
15 statute miles
Lowest ceiling
3,000 ft broken
Temperature
7 °F, dew point -0 °F
Altimeter
30.00 inHg
Observed at
OLF

FAA reports on this event · 1

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