ANC84FA094

NTSB accident investigation · Cessna A185F · Talkeetna, AK · June 17, 1984

Accident · No injuriesField investigationFinal report
Date
June 17, 1984, 10:30 local (18:30 UTC)
Place
Talkeetna, AK
Injuries
4 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N1047FCessna A185F
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Case key
4215

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

On this page

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.

Airframe/component/system failure/malfunctionTakeoff
Terrain condition - rough/uneven
Landing gear,main gear - fatigueCause
Main gear collapsedLanding
Landing gear,main gear strut - overload

Analysis

The acft was being used to transport mountain climbers from a glacier. During takeoff from the glacier, the right landing gear strut failed at the axle point & the wheel/ski dangled free. When he landed on a gravel rwy, the plt held off the right side as long as possible. When the right strut touched down, it dug in, then collapsed. An exam revealed a fatigue crack thru aprx 65% of the strut, pn 0741001-8, where 2 bolt holes were drilled, aprx 1 1/2 inches from the lower end. The crack originated in the bottom of corrosion pits (rust) located at the inboard side of the upper aft spindle attachment bolt hole.

Aircraft

Registration
N1047F
Reported as
Cessna A185F
Category
Airplane
Serial number
18502704
Airframe hours
6,000
Engine
Continental IO-520, 300 horsepower, reciprocating
Damage
Substantial damage
Flight
Part 135
Registered owner
Talkeetna Air Taxi, Inc.
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · March 2, 1984 · 31 hours before
Departed
Kahiltna Glacer, AK
Flight plan
VFR
Airport
TKA · Talkeetna, runway 36, 4,000 × 60 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
30
Certificates
Commercial, Flight instructor
Airplane ratings
Single-engine land, Multi-engine land, Single-engine sea
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
9,860 total · 6,000 in this make and model · 9,850 as pilot in command · 150 in the last 90 days · 75 in the last 30 days · 6 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
50 statute miles
Lowest ceiling
None
Temperature
64 °F, dew point 10 °F

Other investigations on N1047F · 3

Matched to the same aircraft by N-number and date.