SEA07TA203

NTSB accident investigation · Cessna TU206G · New Meadows, ID · July 14, 2007

Accident · No injuriesFinal report
Date
July 14, 2007, 09:15 local (15:15 UTC)
Place
New Meadows, ID
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N9374ZCessna TU206G
Weather
Visual (VMC) · Day
Status
Completed · report December 20, 2007
Report
Approved by Office Director
Parties
FAA FSDO
FAA report
20070714013809A
Case key
66229

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 loss of engine power due to the loss of engine oil pressure following the oil pump's drive shaft failure for an undetermined reason. Contributing factors were the lack of suitable terrain for a forced landing and the rough/uneven terrain.

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 powerCruise - normal
Lubricating system,oil pressure pump - failure,totalCause
Forced landingDescent - emergency
On ground/water encounter with terrain/waterLanding - roll
Terrain condition - none suitableFactor
Terrain condition - rough/unevenFactor

Analysis

During cruise flight the airplane's engine began losing oil pressure and RPM. The pilot performed a forced landing, but encountered rough/uneven terrain during the landing roll. The aircraft's nose gear collapsed bending the bulkhead keels, nose wheel bracket, and the right wing tip rib. During the engine examination; the oil pump drive gear shaft was discovered to be fractured through at the spline drive. The reason for its failure was not determined.

Factual narrative

On July 14, 2007, at approximately 0915 mountain daylight time, a Cessna TU206G, N9374Z, was substantially damaged during a forced landing on Horse Mountain, near New Meadows, Idaho. The commercial pilot and his passenger were not injured. The airplane was being operated under contract to the United States Department of Agriculture, Forest Service (USFS) by McCall Aviation of McCall, Idaho, as a public use flight. The purpose of the flight was to conduct airborne fire reconnaissance. Visual meteorological conditions prevailed. A company flight plan had been filed; the flight had originated from McCall, Idaho, at 0813.

The pilot said that the airplane's engine began losing oil pressure and RPM. He performed a forced landing, but encountered rough/uneven terrain during the landing roll. The aircraft's nose gear collapsed bending the bulkhead keels, nose wheel bracket, and the right wing tip rib. On October 2, 2007, Teledyne Continental Motor's, Inc. and the United States Forest Service examined the engine; the oil pump drive gear shaft was discovered to be fractured through at the spline drive. The reason for its failure was not determined.

Aircraft

Registration
N9374Z
Reported as
Cessna TU206G
Category
Airplane
Serial number
U20606440
Airframe hours
4,046
Engine
Continental TSIO-520-M, 300 horsepower, reciprocating
Damage
Substantial damage
Flight
Public aircraft - federal · Part 91
Operator
U.S. Forest Service, doing business as McCall Aviation
Registered owner
Wilderness Aircraft II LLC
Airworthiness certificate
Standard, Normal
Last inspection
AAIP · July 1, 2007
Departed
MYL · McCall, ID
Destination
MYL
Flight plan
Company 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
29
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, With waivers/limitations
Last flight review
October 1, 2006
Seat
Left
Flight hours
2,800 total · 1,300 in this make and model · 2,600 as pilot in command · 250 in the last 90 days · 100 in the last 30 days · 4 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
104° at 6 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
72 °F, dew point 52 °F
Altimeter
30.14 inHg
Observed at
MYL, 25 nm away

FAA reports on this event · 1

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