# NTSB SEA86LA224: Piper PA-18-150, N23TT, Kent, WA, August 24, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: August 24, 1986, 16:15 local (23:15 UTC)
- Place: Kent, WA
- Coordinates: 47.639778, -121.89096 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=47.6398&lon=-121.8910&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 40486
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA86LA224
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/40486/pdf
- Page: https://openairdocs.org/ntsb/SEA86LA224

## Sequence of events

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

- Loss of control - on ground/water, landing - roll
  - directional control - not maintained, pilot in command (cause)
  - brakes(normal) - delayed, pilot in command (cause)
  - ground loop/swerve - inadvertent, pilot in command (cause)
- On ground/water encounter with terrain/water, landing - roll

## Analysis

THE PLT LOST CONTROL OF THE ACFT DURING LANDING ROLL AND A GROUND LOOP TO THE RIGHT OCCURRED DESPITE THE PLTS ATTEMPT TO REGAIN CONTROL OF THE ACFT. THE PLT STATED HIS ABILITY TO USE THE HEEL BRAKES WAS DELAYED DUE TO THE TYPE OF SHOES HE WAS WEARING.

## Aircraft

- Registration: [N23TT](https://openairdocs.org/aircraft/N23TT), registered now, S/N 18-6684 (OpenAirDocs)
- Reported make and model: PIPER PA-18-150
- Registry model: [Piper PA-18](https://openairdocs.org/model/piper-pa-18) (registry code 7101802) (OpenAirDocs)
- Registry engine: [Continental C90 series](https://openairdocs.org/engine/continental-c90-series) (registry code 17009, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 18-6684
- Engines: LYCOMING O-320-A2A 150 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Richard Taylor
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, May 11, 1986, 50 hours before
- Departed: RTN, RENTON, WA
- Destination: S36, KENT, WA
- Airport: S36, Crest Airpark, runway 33, 3,100 × 75 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 37; flight instructor, commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: front; flight hours: 1,442 total, 25 in this make and model, 1,297 as pilot in command, 123 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 330° at 10 knots
- Visibility: 50 statute miles
- Lowest ceiling: none
- Temperature: 70 °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 (OpenAirDocs).

- [Accident 19860824075599A](https://openairdocs.org/incident/19860824075599A), Aug 24, 1986: Piper PA18, Kent, WA, Substantial damage. The aircraft ground looped on landing rollout. The pilot reported that his shoes interferred with brake operation.

## Other investigations on N23TT (1)

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.

- [NTSB WPR11CA308](https://openairdocs.org/ntsb/WPR11CA308), Jul 2, 2011: Piper PA-18 (N23TT), Enumclaw, WA, destroyed. Probable cause: The pilot's failure to maintain an adequate airspeed during an encounter with a mountain wave and downdraft landing.

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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