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Atlas / NTSB / CEN11CA511

NTSB CAROL · Event

Event CEN11CA511

2011-07-23 Broomfield, Colorado, United States Airport · KBJC None 1 aircraft Status: Completed

Registry · N915BW

FAA Aircraft Registry record.

Make / Model

ROBINSON HELICOPTER R44 II

Year of manufacture

2006 · 5 years old at event

TCDS

H11NM · ROBINSON HELICOPTER CO

Engine

LYCOMING IO-540-AE1A5 (260 hp)

Seats / Engines

4 seats · 1 engine

Last airworthiness date

20060918

ADS-B equipped

Yes — Mode-S ACA96C

Registrant of record

PIGNERI PAUL A

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

Probable cause & findings

A loss of control due to the pilot's diverted attention as a result of an open door.

Factual narrative

According to the pilot, the takeoff was normal and as the helicopter accelerated forward, the right door of the helicopter came open. The pilot, who was seated in the right seat, reacted by attempting to secure the door and subsequently lost control of the helicopter. The helicopter impacted the ramp. During the impact, the left skid separated, the right skid was crushed up and bent out, and the firewall and tailrotor were bent. The pilot reported that there were no mechanical failures or malfunctions prior to the accident. He did state that he had checked the security of the door with elbow pressure prior to departure but postulated that the securing pin was not fully engaged. According to the pilot, the right door opened during takeoff; he lost control of the helicopter while attempting to secure the door. The helicopter impacted the ramp, the skids separated, and the firewall and tail rotor sustained substantial damage. The pilot reported that there were no mechanical failures or malfunctions prior to the accident. He stated that, prior to departure, he checked the security of the door with elbow pressure but postulated that the securing pin was not fully engaged. 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-Psychological-Attention/monitoring-Attention-Pilot - C
  • Aircraft-Aircraft structures-Doors-(general)-Related operating info
  • C Personnel issues-Task performance-Use of equip/info-Aircraft control-Pilot - C

Verbatim from NTSB's published report. Source file NTSB_2011_CEN11CA511.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.

Related research

What the literature says.

Academic papers and agency reports matching this event's aircraft type or causal vocabulary (loss of control). Sourced from NASA NTRS, NTSB Safety Studies, FAA CAMI, AOPA Air Safety Institute, Embry-Riddle Scholarly Commons, arXiv, and the Semantic Scholar academic graph.

Browse the full corpus — academia portal ↗