ANC96LA152

NTSB accident investigation · Cessna 206F · Talkeetna, AK · September 8, 1996

Accident · No injuriesLimited investigationFinal report
Date
September 8, 1996, 12:16 local (20:16 UTC)
Place
Talkeetna, AK
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N9515GCessna 206F
Weather
Visual (VMC) · Day
Status
Completed · report August 25, 1997
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19960908029889A
Case key
2902

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Probable cause

The disconnection of the nosegear scissors assembly due to the loss of a retainer bolt.

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.

Nose gear collapsedLanding - roll
Landing gear,nose gear assembly - disconnectedCause
Miscellaneous,bolt/nut/fastener/clamp/spring - missingCause
Landing gear,steering system - disabled

Analysis

The pilot reported that shortly after a normal touchdown on a paved runway, the nosegear suddenly collapsed. An examination of the nosegear assembly disclosed that nosegear drag link scissors assembly was disconnected, and that the retaining bolt connecting the scissors halves was missing. The loss of the bolt and the separation of the scissors allowed the nosewheel to caster freely. The nosegear was equipped with an oversized, 8:50 by 10 inch tire, and larger than standard nose fork.

Factual narrative

On September 8, 1996, about 1216 Alaska daylight time, a wheel equipped Cessna 206F airplane, N9515G, sustained substantial damage while landing at the Talkeetna Airport, Talkeetna, Alaska. The airline transport certificated pilot and the sole passenger aboard were not injured. The local, 14 CFR Part 91 flight operated in visual meteorological conditions.

During a telephone conversation with the NTSB investigator-in-charge on September 12, the pilot related he had departed the Talkeetna airport for a short flight to Bald Mountain. The purpose of the flight was to assess the short landing strip located at Bald Mountain, and to see if the pilot thought the airstrip was suitable to haul fuel into to support a generator operated by a utility company. The pilot stated the landing at Bald Mountain was uneventful. He said he did an initial touch and go landing, and then made another, full stop landing. He said he walked the airstrip, and that the biggest rocks were about the size of a man's fist. He said he thought the airstrip would be okay to haul fuel to. The pilot said the takeoff from Bald Mountain was normal, but upon touchdown at Talkeetna, the airplane's nosewheel made a screeching sound as soon as it touched the runway. The nosewheel subsequently collapsed, and the right wing struck the ground.

Examination of the airplane's nosewheel landing gear by the pilot and FAA inspectors, disclosed a fractured nosewheel scissors drag link. The castellated nut which assists in holding the scissors links together was missing, and the pilot believes that the nut may have sheared prior to touchdown, allowing the bolt to fall out and the steerable nosewheel to caster freely. An FAA inspector and the pilot both noted the nosewheel tire appears to have a wear pattern which is consistent with the lower nosegear drag link rubbing against the nosegear tire.

The nosegear fork was a larger than standard fork, and the nosegear tire was an oversized, 8:50 by 10 inch tire.

Aircraft

Registration
N9515G
Reported as
Cessna 206F
Category
Airplane
Serial number
U20601715
Airframe hours
3,760
Engine
Continental IO-520-F, 300 horsepower, reciprocating
Damage
Substantial damage
Flight
Business · Part 91
Registered owner
Robert J. Priewe
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · August 31, 1996 · 7 hours before
Departed
TKA
Airport
TKA · Talkeetna, runway 36, 3,500 × 75 ft, asphalt

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
45
Certificate
Airline transport
Airplane ratings
Single-engine sea, Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
20,000 total · 2,000 in this make and model · 18,000 as pilot in command · 70 in the last 90 days · 40 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
90 statute miles
Lowest ceiling
None
Temperature
61 °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.