# NTSB SEA84LA004: Cessna 180, N180TC, Silverdale, WA, October 1, 1983

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: October 1, 1983, 14:00 local (21:00 UTC)
- Place: Silverdale, WA
- Coordinates: 47.669345, -122.720214 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=47.6693&lon=-122.7202&mi=10
- Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 39843
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA84LA004
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/39843/pdf
- Page: https://openairdocs.org/ntsb/SEA84LA004

## Sequence of events

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

- Airframe/component/system failure/malfunction, taxi
  - landing gear,normal brake system - failure,total (cause)
- Main gear collapsed, taxi
  - landing gear,main gear - overload

## Analysis

THE PLT STATED HE WAS DEMONSTRATING HOW NOT TO GROUND LOOP AN AIRPLANE. WHEN SPEED WAS BUILT UP ON THE TAXIWAY, HE APPLIED BRAKES & THE LEFT BRAKE FAILED. THE LEFT MAIN GEAR & LEFT WING FOLDED.

## Aircraft

- Registration: [N180TC](https://openairdocs.org/aircraft/N180TC), registered now, S/N 18052455 (OpenAirDocs)
- Reported make and model: CESSNA 180
- Registry model: [Cessna 180J](https://openairdocs.org/model/cessna-180j) (registry code 2072622) (OpenAirDocs)
- Registry engine: [Continental O-470 series](https://openairdocs.org/engine/continental-o-470-series) (registry code 17026, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 18052455
- Airframe hours: 990
- Engines: CONTINENTAL O-470-R 230 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Thomas Casey
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, May 1, 1983
- Departed: S42, SILVERDALE, WA
- Flight plan: Unknown
- Airport: S42, Apex

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 46; commercial; airplane ratings: single-engine sea, single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; flight hours: 6,500 total, 900 in this make and model, 6,400 as pilot in command, 101 in the last 90 days, 5 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 260° at 4 knots
- Visibility: 15 statute miles
- Lowest ceiling: 8,000 ft broken
- Temperature: 61 °F, dew point 41 °F
- Altimeter: 29.00 inHg
- Observed at: PWT, 10 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 (OpenAirDocs).

- [Accident 19831001054259A](https://openairdocs.org/incident/19831001054259A), Oct 1, 1983: Cessna 180J, Silverdale, WA, Substantial damage. Aircraft ground looped during fast taxi when pilot was demonstrating how not to ground loop.

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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