Monday, March 09, 2020

Loss of Control on Ground: de Havilland Canada DHC-6-300 Twin Otter, N72GC; accident occurred March 06, 2020 at Boulder City Municipal Airport (KBVU), Clark County, Nevada

Additional Participating Entity:
Federal Aviation Administration / Flight Standards District Office; Las Vegas, Nevada

Aviation Accident Factual Report - National Transportation Safety Board: https://app.ntsb.gov/pdf 

 
https://registry.faa.gov/N72GC


Location: Boulder City, NV
Accident Number: WPR20CA112
Date & Time: 03/06/2020, 1115 PDT
Registration: N72GC
Aircraft: De Havilland DHC6
Aircraft Damage: Substantial
Defining Event: Loss of control on ground
Injuries:2 None 
Flight Conducted Under: Part 91: General Aviation - Instructional 

The newly hired pilot was being trained for a First Officer position in the twin-engine airplane by one of the operator's trainer pilots. After accomplishing air work, the flight returned to practice landings and takeoffs. According to both pilots, the first approach was normal, and the airplane made a normal touchdown, just slightly right of the runway centerline. The trainee pilot stated that after touchdown, the airplane began drifting further to the right, and that he was unable to correct that deviation. The trainer pilot reported that when directional control became unstable, he told the trainee "I have the controls". The trainer pilot observed that the trainee released his hands from the engine power levers and the yoke, but the airplane continued to deviate to the right, contrary to his control inputs. He added asymmetric power to the engines to help regain the centerline, without success.

The trainer pilot realized that based on his inputs, the airplane should have returned to the centerline but did not, and that the airplane was behaving as if the trainee pilot was applying some braking. At that point, the trainer pilot "clearly shouted a second time" for the trainee to release the controls. The airplane then exited the right side of the runway and collided with a ditch. During that rollout, the trainer pilot used the brakes, which he reported applied and released normally.

The trainer pilot reported that it was his opinion that the trainee pilot's feet were either on the brakes or interfered with his brake and/or rudder application attempts. The trainee reported that he could not recall the position of his feet after he relinquished airplane control to the trainer pilot.

The airplane sustained substantial damage to the right wing.

The pilot reported that there were no mechanical failures or malfunctions with the airplane that would have precluded normal operation. 

Flight Instructor Information

Certificate: Airline Transport
Age: 55, Male
Airplane Rating(s): Multi-engine Land
Seat Occupied: Left
Other Aircraft Rating(s): None
Restraint Used:
Instrument Rating(s): Airplane
Second Pilot Present: Yes
Instructor Rating(s): None
Toxicology Performed: No
Medical Certification: Class 1 With Waivers/Limitations
Last FAA Medical Exam: 02/25/2020
Occupational Pilot: Yes
Last Flight Review or Equivalent: 10/22/2019
Flight Time:  23500 hours (Total, all aircraft), 20000 hours (Total, this make and model), 18500 hours (Pilot In Command, all aircraft), 75 hours (Last 90 days, all aircraft), 28 hours (Last 30 days, all aircraft), 3 hours (Last 24 hours, all aircraft)

Pilot Information

Certificate: Commercial; Private
Age: 52, Male
Airplane Rating(s): Multi-engine Land; Single-engine Land
Seat Occupied: Right
Other Aircraft Rating(s): None
Restraint Used:
Instrument Rating(s): Airplane
Second Pilot Present: Yes
Instructor Rating(s): None
Toxicology Performed:No 
Medical Certification: Class 1 With Waivers/Limitations
Last FAA Medical Exam: 01/17/2020
Occupational Pilot:Yes 
Last Flight Review or Equivalent: 09/26/2018
Flight Time:  583 hours (Total, all aircraft), 4 hours (Total, this make and model), 539 hours (Pilot In Command, all aircraft), 8 hours (Last 90 days, all aircraft), 6 hours (Last 30 days, all aircraft), 1 hours (Last 24 hours, all aircraft)

Aircraft and Owner/Operator Information

Aircraft Make: De Havilland
Registration: N72GC
Model/Series: DHC6 300
Aircraft Category: Airplane
Year of Manufacture: 1969
Amateur Built: No
Airworthiness Certificate: Normal
Serial Number: 264
Landing Gear Type: Tricycle
Seats:21 
Date/Type of Last Inspection: 09/25/2019, Continuous Airworthiness
Certified Max Gross Wt.: 12500 lbs
Time Since Last Inspection:
Engines: 2 Turbo Prop
Airframe Total Time: 50964 Hours as of last inspection
Engine Manufacturer:
ELT: Installed, not activated
Engine Model/Series:
Registered Owner: Monarch Enterprises Inc
Rated Power:
Operator: Grand Canyon Airlines
Operating Certificate(s) Held: Commercial Air Tour (136)

Meteorological Information and Flight Plan

Conditions at Accident Site: Visual Conditions
Condition of Light: Day
Observation Facility, Elevation: BVU, 2200 ft msl
Distance from Accident Site: 0 Nautical Miles
Observation Time: 1115 PST
Direction from Accident Site:
Lowest Cloud Condition: Clear
Visibility:  10 Miles
Lowest Ceiling: None
Visibility (RVR):
Wind Speed/Gusts: 5 knots /
Turbulence Type Forecast/Actual:
Wind Direction: Variable
Turbulence Severity Forecast/Actual:
Altimeter Setting: 30.08 inches Hg
Temperature/Dew Point: 21°C / -1°C
Precipitation and Obscuration: No Obscuration; No Precipitation
Departure Point: Boulder City, NV (BVU)
Type of Flight Plan Filed: Company VFR
Destination: Boulder City, NV (BVU)
Type of Clearance: None
Departure Time: 1005 PDT
Type of Airspace: Class E

Airport Information

Airport: Boulder City (BVU)
Runway Surface Type: Asphalt
Airport Elevation: 2200 ft
Runway Surface Condition: Dry
Runway Used: 27
IFR Approach: None
Runway Length/Width: 4803 ft / 75 ft
VFR Approach/Landing: Traffic Pattern

Wreckage and Impact Information

Crew Injuries: 2 None
Aircraft Damage: Substantial
Passenger Injuries: N/A
Aircraft Fire: None
Ground Injuries: N/A
Aircraft Explosion: None
Total Injuries: 2 None
Latitude, Longitude: 35.947222, -114.864722 (est)

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