# NTSB SEA83LA175: Pitts S-1S, N8067, Madras, OR, August 13, 1983

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: August 13, 1983, 11:00 local (18:00 UTC)
- Place: Madras, OR
- Coordinates: 44.599349, -121.049461 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=44.5993&lon=-121.0495&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 39753
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA83LA175
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/39753/pdf
- Page: https://openairdocs.org/ntsb/SEA83LA175

## Sequence of events

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

- Loss of control - in flight, maneuvering
  - aerobatics - performed, pilot in command (contributing factor)
  - proper altitude - not maintained, pilot in command (cause)
  - stall - inadvertent, pilot in command (cause)
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

THE ACFT COLLIDED WITH THE GROUND WHILE PERFORMING LOW LEVEL AEROBATICS OVER THE ARPT. THE PILOT STATED THAT WAS PRACTICING A LOW LEVEL PASS OVER THE ARPT AND THAT WHILE ROLLING HE FELT THE ACFT WAS NOT RESPONDING CORRECTLY. HE SAID HIS RATE OF DESCENT WAS GREATER THAN ANTICIPATED AND FELT HE MAY HAVE ENCOUNTERED A DOWNDRAFT. THE ACFT CRASHED OFFTHE RWY IN SAGEBRUSH AND SAND IN AN INVERTED POSITION.

## Aircraft

- Registration: [N8067](https://openairdocs.org/deregistered/N8067-2011-02-25), registration cancelled 2011-02-25, S/N 1-0036, built 1976 (OpenAirDocs)
- Reported make and model: PITTS S-1S
- Registry model: [Aerotek PITTS SPECIAL S-1S](https://openairdocs.org/model/aerotek-pitts-special-s-1s) (registry code 0110301) (OpenAirDocs)
- Registry engine: [Lycoming I0360 series](https://openairdocs.org/engine/lycoming-i0360-series) (registry code 41515, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 1-0036
- Airframe hours: 652
- Engines: LYCOMING IO-360-C1E6 180 horsepower reciprocating
- Damage: Destroyed
- Flight: Personal, Part 91
- Registered owner: William E. Stone
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Annual, June 29, 1983
- Departed: S33, MADRAS, OR
- Airport: S33, Madras City County

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 56; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: front; flight hours: 5,000 total, 652 in this make and model, 5,000 as pilot in command, 50 in the last 90 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 180° at 8 knots
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 81 °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 19830813043609A](https://openairdocs.org/incident/19830813043609A), Aug 13, 1983: Amtrpt PITTSSPECS1, Madras, OR, Destroyed. Lost control and flew into ground on an inverted low pass over airport. Was practicing under a waiver for aerobatics

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.