# NTSB ANC84LA135: Cessna 170B, N4691C, Kenai, AK, August 12, 1984

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: August 12, 1984, 11:20 local (19:20 UTC)
- Place: Kenai, AK
- Coordinates: 60.65924, -150.900207 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=60.6592&lon=-150.9002&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 4337
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC84LA135
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/4337/pdf
- Page: https://openairdocs.org/ntsb/ANC84LA135

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Undershoot, approach - vfr pattern - final approach
  - planned approach - misjudged, pilot in command (cause)
  - distance - misjudged, pilot in command (cause)
  - unsuitable terrain or takeoff/landing/taxi area - selected, pilot in command (cause)
- Hard landing, landing - flare/touchdown
  - landing gear,main gear attachment - overload (contributing factor)
  - directional control - not maintained, pilot in command (cause)
  - ground loop/swerve - not corrected, pilot in command (cause)

## Analysis

THE PLT WAS TRYING TO LAND ON A GRAVEL OIL DRILLING PAD. THE ACFT LANDED SHORT OF THE PAD AND COLLIDED WITH A BEAM. AFTER A BOUNCE AND A YAW THE ACFT TOUCHED DOWN AGAIN AND THE RT MAIN LANDING GEAR FAILED. THE PLT SAID HIS SELECTION OF LANDING AREA WAS POOR.

## Aircraft

- Registration: [N4691C](https://openairdocs.org/deregistered/N4691C-2014-10-14), registration cancelled 2014-10-14, S/N 25635, built 1953 (OpenAirDocs)
- Reported make and model: CESSNA 170B
- Registry model: [Cessna 170B](https://openairdocs.org/model/cessna-170b) (registry code 2072306) (OpenAirDocs)
- Registry engine: [Continental C145 series](https://openairdocs.org/engine/continental-c145-series) (registry code 17012, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 25635
- Airframe hours: 2857
- Engines: CONTINENTAL C-145 145 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Calvin A. Whitehead
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, April 2, 1984
- Departed: MRI, ANCHORAGE, AK

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 55; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 232 total, 195 in this make and model, 195 as pilot in command, 10 in the last 90 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 50 statute miles
- Lowest ceiling: none
- Temperature: 61 °F

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19840812040199A](https://openairdocs.org/incident/19840812040199A), Aug 12, 1984: Cessna 170B, Kenai, AK, Substantial damage. Bounced on landing in a rough area. Lost control and ground looped.

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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