NTSB CAROL · Event
Event CEN11CA326
Registry · N314JF
FAA Aircraft Registry record.
Make / Model
ZIPLINE INTERNATIONAL INC P2 ZIP
ADS-B equipped
Yes — Mode-S A3567B
Registrant of record
ZIPLINE INTERNATIONAL INC
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
The pilot's loss of elevator control, due to control stick's counter-weight binding with the airplane's header tank.
Factual narrative
The pilot had just purchased the kit airplane and had spent part of the day doing taxi tests,in order to become familiar with the airplane. Later in the day, the pilot and passenger decided on flying the airplane. The pilot reported during the initial take-off, he thought there was a little binding on the control stick, but dismissed it as just requiring some lubrication. After about an hour of maneuvering the airplane, they decided on doing several practice approaches. On the third approach, the pilot realized that he was unable to move the control stick forward. The pilot found that he was able to control the airplane's altitude by engine power and trim. During the flight to a larger airport for the emergency landing, the pilot asked his passenger to check the control stick's counterweight, located near the airplane's header tank. The passenger reportedly told the pilot that the counterweight was binding on the fuel tank. A forced landing was conducted and the airplane bounced twice before impacting the propeller, and separating of the airplane's left canard/landing gear. The pilot added that the pivot bolt holding the counterweight was tight; however, the counterweight had a little movement, allowing the weight to bind with the airplane's header tank. The pilot was becoming familiar with the experimental airplane he had just purchased by practicing taxi tests. He decided to take the airplane on a flight and during the initial takeoff, he experienced some binding on the control stick, but dismissed it as just requiring some lubrication. He flew for about an hour and decided to practice a few approaches. On the third approach, he realized that he was unable to move the control stick forward, but he was able to control the airplane's altitude by engine power and trim. He elected to divert to another airport and performed an emergency landing. During the landing the airplane bounced twice, the propeller struck the ground and the airplane's left canard/landing gear separated. The pilot reported that the pivot bolt holding the counterweight was tight and the counterweight had a little movement which allowed the weight to bind with the airplane's header tank. 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 Aircraft-Aircraft systems-Flight control system-(general)-Not specified - C
Verbatim from NTSB's published report. Source file
NTSB_2011_CEN11CA326.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
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Related research
What the literature says.
Academic papers and agency reports matching this event's aircraft type or causal vocabulary (icing). Sourced from NASA NTRS, NTSB Safety Studies, FAA CAMI, AOPA Air Safety Institute, Embry-Riddle Scholarly Commons, arXiv, and the Semantic Scholar academic graph.
- NASA NTRS 2026 · Contractor Report (CR)
Icing Physics Studies Using the 3D SIDRM Test Article: 2023 Icing Tests Analysis
In-flight icing is an important safety issue and is a factor that affects aircraft design and performance. Newer regulations are driving a need for improvements in airframe and engine icing simulation…
- arXiv 2025 · arXiv preprint
Multi-Agent Deep Reinforcement Learning for UAV-Assisted 5G Network Slicing: A Comparative Study of MAPPO, MADDPG, and MADQN
The growing demand for robust, scalable wireless networks in the 5G-and-beyond era has led to the deployment of Unmanned Aerial Vehicles (UAVs) as mobile base stations to enhance coverage in dense urb…
- Embry-Riddle Scholarly Commons 2025 · Journal article (JAAER)
A Mathematical Model on the Temporal Dynamics of Aviation Competitive Pricing
This study investigates the competitive dynamics of airport pricing using U.S. airport data to validate the findings. It employs linear and nonlinear ordinary differential equation models to analyze t…
- NASA NTRS 2025 · Presentation
NASA Icing Update – March 2025
This NASA Icing Update was prepared for presentation to the SAE International AC-9C Inflight Icing Technology Committee. This update includes the following topics: planned Rotational Icing Scaling tes…
- arXiv 2024 · arXiv preprint
An energy-stable phase-field model for droplet icing simulations
A phase-field model for three-phase flows is established by combining the Navier-Stokes (NS) and the energy equations, with the Allen-Cahn (AC) and Cahn-Hilliard (CH) equations and is demonstrated ana…
- NASA NTRS 2024 · Presentation
NASA Icing Update – Oct 2024
This presentation provides a status update on select NASA icing research activities for the SAE AC-9C Icing Technical Committee Meeting on Oct 21, 2024.
Browse the full corpus — academia portal ↗