# NTSB SEA83FU006: American Aerolights Eagle XL, Happy Valley, OR, July 4, 1983

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Final report
- Date: July 4, 1983, 13:50 local (20:50 UTC)
- Place: Happy Valley, OR
- Coordinates: 45.480407, -122.510543 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=45.4804&lon=-122.5105&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 39640
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA83FU006
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/39640/pdf
- Page: https://openairdocs.org/ntsb/SEA83FU006

## Analysis

THE ULTRALIGHT COLLIDED WITH THE TERRAIN WHILE MANEUVERING DURING AN AIRSHOW. ACCORDING TO WITNESSES, THE PILOT HAD JUST EXECUTED A TOUCH-AND-GO LANDING AND COMMENCED A CLIMBING 180 DEGREE LEFT TURN TO DOWNWIND IN WHAT WAS DESCRIBED AS A WINGOVER TYPE MANEUVER. DURING THE TURN, THE VEHICLE WAS OBSERVED TO EXCEED 90 DEGREES OF BANK (LEFT WINGDOWN) AND A RAPID SLIP DEVELOPED. THE ULTRALIGHT WAS PLACARDED FOR A MAXIMUM ANGLE OF BANK OF 6O DEGREES. IT WAS OBSERVED TO DESCEND INTO TREES IN AN EXTREME LEFT WING LOW CONDITION.

## Sequence of events

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

- Loss of control - in flight, maneuvering
  - procedures/directives - disregarded, pilot in command (cause)
  - aerobatics - performed, pilot in command (cause)
  - aircraft handling - improper, pilot in command (cause)
  - stall - uncontrolled, pilot in command (contributing factor)
- In flight collision with terrain/water, maneuvering

## Aircraft

- Registration: UNREG (not matched to a registry record)
- Reported make and model: AMERICAN AEROLIGHTS EAGLE XL
- Category: Ultralight
- Engines: CUYUNA 430B 30 horsepower reciprocating
- Damage: Destroyed
- Flight: Personal, Part 103
- Registered owner: Anthony Krause
- Airport: S15, Troh'S Happy Valley, runway 34, 2,300 × 25 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 29; airplane ratings: single-engine land; medical: unknown; seat: front; flight hours: 60 total, 60 in this make and model, 60 as pilot in command

## Weather

- Conditions: Visual (VMC), Day
- Wind: 270° at 8 knots
- Visibility: 35 statute miles
- Lowest ceiling: none
- Temperature: 79 °F, dew point 63 °F
- Altimeter: 30.00 inHg
- Observed at: TTD, 8 nm away

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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