# NTSB SEA88LA172: Young-Owens Cassutt 3M, N67Y, Caldwell, ID, September 6, 1988

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: September 6, 1988, 16:45 local (22:45 UTC)
- Place: Caldwell, ID
- Coordinates: 43.659816, -116.629089 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=43.6598&lon=-116.6291&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report January 16, 1990
- Report: Approved by Office Director
- NTSB case key (mKey): 40880
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA88LA172
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/40880/pdf
- Page: https://openairdocs.org/ntsb/SEA88LA172

## 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
  - reason for occurrence undetermined (cause)
- Miscellaneous/other, descent
  - emergency procedure - performed
  - misc eqpt/furnishings,survival equipment - engaged
  - misc eqpt/furnishings,parachute/drag chute - open
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

ON TEST FLT IN PREPARATION FOR RENO AIR RACES, PLT ENTERED POWER DIVE AT 10000 FT TO 230 KTS AND EXPERIENCED VIBRATIONS. HE REDUCED POWER AND ENTERED A STEEP NOSE HIGH CLIMB ALLOWING THE AIRCRAFT TO DECELERATE TO NEAR STALL SPEED. THE VIBRATION CONTINUED. AT THE TOP OF THE CLIMB, THE AIRCRAFT NOSED OVER TO A STEEP DESCENT AND WOULD NOT RESPOND TO ELEVATOR CONTROL INPUT. THE PLT PARACHUTED TO SAFETY. IMPACT DAMAGE PRECLUDED MEANINGFUL EXAMINATION OF THE AIRCRAFT CONTROLS. THERE WAS NO SEPARATION OF THE HORIZONTAL TAIL COMPONENTS.

## Aircraft

- Registration: [N67Y](https://openairdocs.org/deregistered/N67Y-1989-07-17), registration cancelled 1989-07-17, S/N 2001 (OpenAirDocs)
- Reported make and model: YOUNG-OWENS CASSUTT 3M
- Registry model: [Young-Owens CASSUTT 3-M](https://openairdocs.org/model/young-owens-cassutt-3-m) (registry code 1970514) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: 2001
- Airframe hours: 262
- Engines: CONTINENTAL O-200-A 100 horsepower reciprocating
- Damage: Destroyed
- Flight: Personal, Part 91
- Registered owner: Gary D. Hubler
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Unknown, September 1, 1988, 2 hours before
- Departed: U35

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 33; airline transport, flight instructor; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: center; flight hours: 9,400 total, 20 in this make and model, 9,200 as pilot in command, 300 in the last 90 days, 60 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 84 °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 19880906038919A](https://openairdocs.org/incident/19880906038919A), Sep 6, 1988: Amtrsx CASSUTT3M, Caldwell, ID, Destroyed. Lost elevator control during a load flight test. Aircraft uncontrollable and severe vibrations. Pilot bailed out.

## Other investigations on N67Y (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 MKC80FCA02](https://openairdocs.org/ntsb/MKC80FCA02), Nov 25, 1979: Young-Owens Cassut (N67Y), Valles Mines, MO, substantial damage

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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