Skip to content

Atlas / NTSB / GAA16CA216

NTSB CAROL · Event

Event GAA16CA216

2016-05-03 Arlington, Washington, United States Airport · AWO None 1 aircraft Status: Completed

Registry · N528PG

FAA Aircraft Registry record.

Make / Model

AIRBORNE REDBACK

Year of manufacture

2002 · 14 years old at event

Engine

ROTAX 503 DCDI (52 hp)

Seats / Engines

2 seats · 1 engine

Last airworthiness date

20070516

ADS-B equipped

Yes — Mode-S A6A7F2

Registrant of record

HARMSWORTH COLIN C

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

Probable cause & findings

The pilot's failure to adequately secure the aircraft while manually starting the engine from outside the cockpit, which resulted in the unmanned aircraft becoming airborne and colliding with a hangar roof.

Factual narrative

According to the pilot of the weight shift controlled trike, he had spent several hours trying to start the trike on the previous day without success. He recalled that on the morning of the accident, with the ignition off, he sprayed ether into each of the carburetors and pulled several times on the engine's starter cord. He reported that he then turned on the ignition, pulled the starter cord once, the engine started and the trike accelerated forward. He recalled that the trike rolled over the chalks that were in front of the wheels, drug him for about 100 feet before he released the cord, and the trike became airborne. The trike was airborne for several seconds before impacting the rooftop of a hangar and sustaining substantial damage to the wing keel and the control bar. The pilot reported that there were not any pre-accident mechanical failures or anomalies with the trike that would have precluded normal operation prior to the accident. The pilot reported that in hind sight, he should have placed the hand throttle to idle before pulling the cord. According to the pilot of the weight shift controlled trike, he had spent several hours trying to start the trike on the previous day without success. He recalled that on the morning of the accident, with the ignition off, he sprayed ether into each of the carburetors and pulled several times on the engine's starter cord. He reported that he then turned on the ignition, pulled the starter cord once, the engine started and the trike accelerated forward. He recalled that the trike rolled over the chalks that were in front of the wheels, drug him for about 100 feet before he released the cord, and the trike became airborne. The trike was airborne for several seconds before impacting the rooftop of a hangar and sustaining substantial damage to the wing keel and the control bar. The pilot reported that there were not any pre-accident mechanical failures or anomalies with the trike that would have precluded normal operation prior to the accident. The pilot reported that in hind sight, he should have placed the hand throttle to idle before pulling the cord. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12

NTSB Findings

Hierarchical cause / factor breakdown from the FAA bulk avdata database. Each finding tagged C (Cause) or F (Factor).

  • C Personnel issues-Task performance-Use of equip/info-Aircraft control-Pilot - C
  • C Aircraft-Aircraft power plant-Engine starting-(general)-Incorrect use/operation - C
  • C Personnel issues-Action/decision-Action-Incorrect action sequence-Pilot - C
  • Environmental issues-Physical environment-Object/animal/substance-Airport structure-Contributed to outcome

Verbatim from NTSB's published report. Source file NTSB_2016_GAA16CA216.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.