Dehavilland DHC-6-300 accident near Boulder City, Nevada, May 6, 2025
On May 6, 2025 at about 9:50 pm local time, a 1969 Dehavilland DHC-6-300, registered N142SA, was substantially damaged in an accident during enroute (cruise) near Boulder City, Nevada (Boulder City Muni airport). It was an aerial observation flight under charter and air-taxi rules (Part 135). No one was hurt; 13 people were on board or involved. The weather was visual conditions (good weather).
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The NTSB's probable cause their words, unchanged
The NTSB has not yet published a probable cause for this accident. Investigations usually take one to two years; this page updates when the final report is released.
Source: NTSB aviation accident database, copy made October 4, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- May 6, 2025 · about 9:50 pm local time
- Place
- Boulder City, Nevada · Boulder City Muni · map
- Type
- Accident
- Injuries
- No one was hurt; 13 people were on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Dehavilland DHC-6-300, built 1969 · all DHC-6-300s on the register
- Registration
- N142SA · registry record · serial 241
- Damage
- Substantial damage
- Flight
- Aerial observation flight · charter and air-taxi rules (Part 135)
The NTSB's narrative preliminary · quoted from the NTSB record
On May 6, 2023, about 1450 Pacific daylight time, a DeHavilland DHC-6-300, N142SA, was substantially damaged when it was involved in an accident near Boulder City, Nevada. The 2 pilots and 11 passengers were not injured. The airplane was operated as a Title 14 Code of Federal Regulations Part 135 non-scheduled air taxi flight. The pilot reported that while operating in visual flight rules (VFR) weather conditions from Grand Canyon Bar Ten Airstrip (1Z1) Whitmore, Arizona to Boulder City Municipal Airport (BVU). While enroute to BVU, they observed adverse weather along their route of flight and diverted south with the intention of landing at Henderson Executive Airport (HND), Henderson, Nevada if the weather worsened. The pilot stated that the weather conditions improved east of BVU and they turned towards the airport. About 7 miles southeast of BVU while maneuvering for weather, the airplane encountered brief light turbulence and hail that lasted about 5 to 6 seconds. The pilot stated that following the encounter, they landed at BVU uneventfully. A convective significant Meteorological Information (SIGMET) 11W was valid on the day of the accident from 1355 to 1459, 20 miles southeast of Las Vegas, Nevada. An isolated thunderstorm was moving from 300° at 15 knots with the tops of the clouds ay about 33,000 ft. The valid time of the report ended at 1555. Post flight examination of the airplane revealed substantial damage to both wings, , vertical stabilizer, and horizontal stabilizers.
The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.
The factual record from the NTSB's investigation tables, in plain English
What happened, in order
- Windshear or thunderstorm during enroute (cruise) defining event
The aircraft
- Airframe total time: 70,008.2 hours
- Last inspection: continuous airworthiness programme, March 20, 2025; 565 hours since
- Maximum gross weight: 12,500 lb
- Seats: 21
- Landing gear: fixed
- Operator: Monarch Enterprises INC
The flight
- Departed from: 1Z1 Whitmore AZ
- Destination: BVD Boulder City NV
- Flight plan: none
- A second pilot was aboard
Weather at the time
- Light: daylight
- Wind: from 040° at 15 knots, gusting 27
- Visibility: 0.8 statute miles
- Sky: broken clouds at 600 ft; a few clouds
- Temperature: 59°F (15°C), dew point 52°F (11°C)
- Altimeter: 29.85 inHg
- Observation at 2:35 pm from KBVU
Weather report (METAR): KBVU 062135Z AUTO 04015G27KT 3/4SM VCTS RA BKN006 OVC030 15/11 A2985 RMK AO2
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Flig | 2 | |||
| Passengers | 11 |
Documents from the investigation the NTSB's docket: the evidence folder behind the report
The docket, the folder of records gathered during an investigation (maintenance records, photographs, witness statements, examinations), has not been read from the NTSB for this case yet; the list appears here once it has. Open the docket at the NTSB.
About this page
Everything above comes from the NTSB's public accident database: the narrative, probable cause and findings are the NTSB's own words, and the coded tables behind its report (pilot, aircraft, flight, weather, injuries, sequence of events) are written out in plain English. Pilots' ages, home towns and medical details are left out on purpose. The documents and photographs are the NTSB's docket, the folder of records gathered during the investigation, shown as the NTSB released them (the NTSB redacts some personal details first) and listed under the NTSB's own titles. This site's own text never names pilots, passengers or anyone else involved. A preliminary report describes what is known soon after the event and can change; the final report, with the probable cause, usually follows one to two years later and this page is refreshed when it does. Case number WPR25LA152.