- Date
- August 31, 2025, 21:02 local (Sep 1, 2025, 02:02 UTC)
- Place
- Round Mountain, TX
- Injuries
- 3 serious
- Damage
- Substantial damage
- Phase of flight
- Landing
- Aircraft
- N36RPSikorsky S-76
- Defining event
- Landing: Collision during takeoff/land
- Weather
- Visual (VMC) · Night/dark
- Status
- Completed · report August 25, 2026
- Report
- Approved by Office Director
- Investigation class
- Class 3
- NTSB office
- Central Region
- Parties
- Pratt & Whitney Canada, FAA San Antonio FSDO, Transportation Safety Board of Canada
- FAA report
- 20250831012969A
- Case key
- 200918
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
Probable cause
The flight crew’s failure to properly identify the heliport in dark night conditions, which resulted in the flight crew attempting to land and a subsequent impact with trees and terrain.
Findings · 8
NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.
Sequence of events
The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.
Analysis
The purpose of the on-demand night flight in the helicopter was to transport the passenger from a commercial airport to a private heliport on a ranch in a rural area. Due to previous issues with the helicopter’s autopilot system and the possible concern of losing control in instrument meteorological conditions, the captain decided not to perform an instrument flight rules flight to the heliport. During the flight, an instrument approach was loaded into the helicopter’s flight management system, but it was not activated. Additionally, each pilot had an Apple iPad mounted in the cockpit, that was utilizing ForeFlight with the heliport coordinates loaded into ForeFlight. During the approach to the heliport, the captain contacted the ranch manager via text message on a cellular phone, to ensure the heliport floodlight system was activated. The first officer activated the heliport ground lights, which were a green color, via a radio frequency. Both pilots acknowledged observing green lights in their sight. The captain reported that he “cross-checked” the map display with the outside visual references to confirm alignment with the heliport, which he thought had matched. The first officer extended the landing gear, he completed the before landing checklist, and he then transitioned to viewing outside of the helicopter to try and visually acquire the heliport. The captain delayed turning on the landing lights until closer to the heliport to avoid glare from moisture and haze reflecting in the light beams. The captain began maneuvering the helicopter for landing. Within seconds, the captain lost outside visual references, and he transitioned to instruments. The first officer looked inside the cockpit and observed the radar altimeter indicated 20 ft. Before the first officer could verbally call out to execute a go around, the helicopter terrain awareness and warning system activated an alert, and the helicopter impacted trees and terrain. The helicopter sustained substantial damage to the fuselage, the main rotor system, the tail boom, the empennage, and the tail rotor system. The captain reported there were no preimpact mechanical malfunctions or failures with the airframe or the two turboshaft engines that would have precluded normal operation. A review of meteorological data at the time of the accident showed dark night conditions were present for the accident site. It is likely the flight crew failed to properly identify the heliport in dark night conditions, which resulted in the flight crew attempting to land at the incorrect location. It is also likely the flight crew failed to properly utilize navigation information and visual cues to verify the location of the heliport.
Factual narrative
On August 31, 2025, about 2102 central daylight time, a Sikorsky S-76D helicopter, N36RP, sustained substantial damage when it was involved in an accident near Round Mountain, Texas. The captain, the first officer, and the passenger sustained serious injuries. The helicopter was operated by Paradigm Helicopters, LLC, as a Title 14 Code of Federal Regulations Part 135 on-demand flight. The purpose of the unaided night flight in the transport category helicopter was to transport the passenger from a commercial airport to a private heliport on a ranch in a rural area. Due to previous issues with the helicopter’s autopilot system and the possible concern of losing control in instrument meteorological conditions, the captain decided not to perform an instrument flight rules flight to the heliport. Prior to the flight, the captain completed the operator’s flight risk assessment tool. During the flight, an instrument approach was loaded into the helicopter’s flight management system, but it was not activated. Additionally, each pilot had an Apple iPad mounted in the cockpit, that was utilizing ForeFlight with the heliport coordinates loaded into ForeFlight. During the approach to the heliport, the captain contacted the ranch manager via text message on a cellular phone, to ensure the heliport floodlight system was activated. The first officer activated the heliport ground lights, which were a green color, via a radio frequency. Both pilots acknowledged observing green lights in their sight. The captain reported that he “cross-checked” the map display with the outside visual references to confirm alignment with the heliport, which he thought had matched. The first officer extended the landing gear, he completed the before landing checklist, and he then transitioned to viewing outside of the helicopter to try and visually acquire the heliport. The captain delayed turning on the landing lights until closer to the heliport to avoid glare from moisture and haze reflecting in the light beams. The captain began maneuvering the helicopter for landing. Within seconds, the captain lost outside visual references, and he transitioned to instruments. The first officer looked inside the cockpit and observed the radar altimeter indicated 20 ft. Before the first officer could verbally call out to execute a go around, the helicopter terrain awareness and warning system activated an alert, and the helicopter impacted trees and terrain. The helicopter came to rest on its right side. The first officer, who then moved the two engine throttle levers to what he believed was the stop position, was able to egress from the helicopter on his own, while the captain and the passenger were assisted by witnesses and first responders. The captain reported that he previously landed at the heliport between 20 to 25 times, during both day and night conditions, and that he did not recall experiencing any visual illusions during the accident flight. The first officer reported that hepreviously landed at the heliport 20 times, but only during day conditions. The accident site, which was a heavily wooded area near a recreational vehicle park on private property, was about 1.54 miles north of the heliport, and a prominent west to east running river separates the two locations. A review of meteorological data at the time of the accident showed dark night conditions were present for the accident site. While the flight crew reported checking meteorological data from several enroute locations, they did not report checking meteorological data from the closest weather stations near the heliport. The helicopter sustained substantial damage to the fuselage, the main rotor system, the tail boom, the empennage, and the tail rotor system. The captain reported there were no preimpact mechanical malfunctions or failures with the airframe or the two turboshaft engines that would have precluded normal operation. The operator reported that the accident could have been prevented by implementing a night vision goggle program for non-airport operations.
Aircraft
- Registration
- N36RP
- Reported as
- Sikorsky S-76 (D)
- Category
- Helicopter
- Serial number
- 761037
- Built
- 2013
- Airframe hours
- 1,005.2
- Engines
- Pratt & Whitney Canada PW210S, 1,077 horsepower, turbo shaftPratt & Whitney Canada PW210S, 1,077 horsepower, turbo shaft
- Damage
- Substantial damage
- Flight
- Part 135
- Operator
- Paradigm Helicopters LLC, doing business as Paradigm Helicopters LLC
- Registered owner
- Mirasol Sky LLC
- Airworthiness certificate
- Standard, Transport
- Last inspection
- 100 hour · August 4, 2025 · 3.6 hours before
- Departed
- DAL · Dallas, TX
- Destination
- TA22 · Dripping Springs, TX
- Flight plan
- Company VFR
- Airport
- TA22 · Mirasol Hills, runway Helipad H1, 10 × 10 ft, grass/turf
- Equipment
- Electronic flight bag or handheld device, Electronic multifunction display, Electronic primary flight display, Onboard weather, ADS-B, Auto-pilot, Data recorder
Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.
Flight crew · 2
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 64
- Injuries
- Serious
- Certificate
- Commercial
- Instrument ratings
- Helicopter
- Medical
- Class 2, With waivers/limitations
- Last flight review
- April 4, 2025
- Seat
- Right
- Restraint
- 5-point
- Flight hours
- 13,043 total · 344 in this make and model · 12,125 as pilot in command · 14 in the last 90 days · 3 in the last 30 days · 1 in the last 24 hours
- Role
- Co-pilot
- Age
- 55
- Injuries
- Serious
- Certificates
- Private, Flight instructor, Commercial, Airline transport
- Airplane ratings
- Single-engine land, Multi-engine land
- Instrument ratings
- Helicopter, Airplane
- Medical
- Class 1, With waivers/limitations
- Last flight review
- May 9, 2025
- Seat
- Left
- Restraint
- 5-point
- Flight hours
- 6,160 total · 56 in this make and model · 3,165 as pilot in command · 151 in the last 90 days · 21 in the last 30 days · 1 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Night/dark
- Wind
- 60° at 3 knots
- Visibility
- 7 statute miles
- Temperature
- 73 °F, dew point 73 °F
- Altimeter
- 30.08 inHg
- Observed at
- KRYW, 14 nm away
- METAR
- METAR KRYW 010215Z AUTO 06003KT 7SM -RA SCT005 23/23 A3008 RMK AO2 T02260226=
Docket · 23
The files NTSB released with the investigation on August 19, 2026, on NTSB’s docket system: statements, records, photos and specialists’ reports. 78.8 MB in all.
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.