# NTSB DEN87LA181: Piper PA-18-150, N4237Z, Worland, WY, July 14, 1987

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 14, 1987, 15:24 local (21:24 UTC)
- Place: Worland, WY
- Coordinates: 44.000381, -107.950309 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=44.0004&lon=-107.9503&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report May 9, 1988
- Report: Approved by Office Director
- NTSB case key (mKey): 17268
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN87LA181
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/17268/pdf
- Page: https://openairdocs.org/ntsb/DEN87LA181

## Sequence of events

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

- Loss of control - on ground/water, landing - flare/touchdown
  - recovery from bounced landing - improper, pilot in command (cause)
  - lack of total experience in type of aircraft, pilot in command (contributing factor)
  - go-around - not performed, pilot in command (cause)
  - ground loop/swerve - uncontrolled, pilot in command (cause)
- Nose down, landing - roll
  - brakes(normal) - improper use of, pilot in command (cause)

## Analysis

THE PLT SAID THE ACFT BOUNCED DURING LANDING AND HE LOST CONTROL. THE ACFT RAN OFF THE RWY AND WHEN THE PLT APPLIED THE BRAKES TOO HARD, THE ACFT NOSED OVER.

## Aircraft

- Registration: [N4237Z](https://openairdocs.org/aircraft/N4237Z), registered now, S/N 18-8464 (OpenAirDocs)
- Reported make and model: PIPER PA-18-150
- Registry model: [Piper PA-18-150](https://openairdocs.org/model/piper-pa-18-150) (registry code 7101828) (OpenAirDocs)
- Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 18-8464
- Airframe hours: 1676
- Engines: LYCOMING O-320 160 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Carl Yorgason
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, April 7, 1987, 24 hours before
- Airport: WRL, Worland, runway 34, 7,004 × 100 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 32; private; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; seat: front; flight hours: 131 total, 30 in this make and model, 109 as pilot in command, 17 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 10° at 7 knots
- Visibility: 40 statute miles
- Lowest ceiling: none
- Temperature: 84 °F, dew point 43 °F
- Altimeter: 30.00 inHg
- Observed at: WRL, 1 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 19870714048939A](https://openairdocs.org/incident/19870714048939A), Jul 14, 1987: Piper PA18150, Worland, WY, Substantial damage. The aircraft touched down fast, bounced and departed the side of the runway. Excessive braking caused nose over.

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.