# NTSB ANC99LA084: Jasper THUNDERBIRD-2C, N63832, Chugiak, AK, June 25, 1999

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 25, 1999, 15:00 local (23:00 UTC)
- Place: Chugiak, AK
- Coordinates: 61.409481, -149.169891 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=61.4095&lon=-149.1699&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report June 23, 2000
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 46713
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC99LA084
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/46713/pdf
- Page: https://openairdocs.org/ntsb/ANC99LA084

## Probable cause

The failure of the pilot in command to maintain the proper rate of descend and flare, following an engine failure for undetermined reasons.

## Sequence of events

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

- Loss of engine power, approach - vfr pattern - final approach
  - reason for occurrence undetermined (contributing factor)
- Hard landing, emergency descent/landing
  - proper descent rate - not maintained, pilot in command (cause)
  - flare - inadequate, pilot in command (cause)

## Analysis

The pilot was on final approach to land when the engine lost power.  The pilot landed hard on the 1,000 feet long by 50 feet wide ultralight runway.  The control yoke support tube, and aileron control cables were damaged.  It was the pilot's first flight in the experimental, kit built airplane.

## Factual narrative

On June 25, 1999, about 1500 Alaska daylight time, an experimental Jasper Thunderbird-2C airplane, N63832, sustained substantial damage during a hard landing at the Birchwood Airport, Chugiak, Alaska.  The solo private pilot was not injured.  The airplane was operated under 14 CFR Part 91 as a local area personal flight.  The flight departed the Birchwood Airport about 1430, and remained in the local traffic pattern.  Visual meteorological conditions prevailed at the time of the accident, and no flight plan was filed.

The pilot stated to the NTSB investigator-in-charge (IIC) during a telephone interview on July 6, that the engine lost power on final approach to ultralight runway 01.  The airplane landed hard on the 1,000 feet long by 50 feet wide ultralight runway.  The right-forward control yoke support tube was fractured, and two aileron teleflex control cables were damaged.  The pilot had no explanation for the loss of engine power.  It was the pilot's first flight in the airplane.

## Aircraft

- Registration: [N63832](https://openairdocs.org/deregistered/N63832-2000-06-29), registration cancelled 2000-06-29, S/N 99218 (OpenAirDocs)
- Reported make and model: JASPER THUNDERBIRD-2C (THUNDERBIR)
- Registry model: [Jasper Cary TIERRA II/T-BIRD II](https://openairdocs.org/model/jasper-cary-tierra-ii-t-bird-ii) (registry code 05607FQ) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: 99218
- Engines: Rotax 582 66 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Cary W. Jasper
- Airworthiness certificate: Special, Experimental (Special)
- Departed: BCV, BIRCHWOOD, AK
- Airport: BCV, Birchwood, runway 1, 1,000 × 50 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 44; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; seat: left; flight hours: 150 total, 1 in this make and model

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 10 statute miles
- Lowest ceiling: none

## 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 19990625023999A](https://openairdocs.org/incident/19990625023999A), Jun 25, 1999: Amtr THUNDERBIRD2, Birchwood, AK, Substantial damage. No preliminary accident narrative available. (-23) on short final, the engine lost power. A hard landing collapsed the right gear which departed the aircraft.…

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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