Sunday, April 11, 2021

Hard Landing: Sonex, N1222C; accident occurred April 27, 2020 near Cable Airport (KCCB), Upland, San Bernardino County, California

Aviation Accident Final Report - National Transportation Safety Board

The National Transportation Safety Board did not travel to the scene of this accident.

Additional Participating Entity: 

Federal Aviation Administration / Flight Standards District Office; Riverside, California

Investigation Docket - National Transportation Safety Board:

Location: Upland, California
Accident Number: WPR20CA132
Date & Time: April 27, 2020, 08:20 Local
Registration: N1222C
Aircraft: COOK SONEX
Aircraft Damage: Substantial
Defining Event: Hard landing 
Injuries: 1 None
Flight Conducted Under: Part 91: General aviation - Personal


The pilot reported that he returned from a local flight and was practicing touch-and-go landings. During the second takeoff, as the airplane gained altitude, the engine began to gradually lose power. Unable to return to the runway, the pilot initiated a precautionary landing to a strip of gravel that is perpendicular to the runway. During the landing, the right wing was substantially damaged.  

The pilot reported that he did not believe there was problem with the engine, but that the problem was with the fuel-to-air mixture caused by the fuel pressure regulator not keeping a continuous constant pressure that led to the gradual loss of engine power.

Probable Cause and Findings

The National Transportation Safety Board determines the probable cause(s) of this accident to be:
A gradual loss of engine power during takeoff due to the pressure regulator not keeping continuous fuel pressure which led to a precautionary off airport landing and collision with terrain.


Aircraft Fuel pressure indicating - Damaged/degraded
Environmental issues Rough terrain - Not specified

Factual Information

History of Flight

Emergency descent Collision with terr/obj (non-CFIT)
Landing Hard landing (Defining event)

Pilot Information

Certificate: Private 
Age: 66,Male
Airplane Rating(s): Single-engine land 
Seat Occupied: Left
Other Aircraft Rating(s): None 
Restraint Used:
Instrument Rating(s): None 
Second Pilot Present: No
Instructor Rating(s): None 
Toxicology Performed: No
Medical Certification: BasicMed With waivers/limitations
Last FAA Medical Exam: November 26, 2019
Occupational Pilot: No 
Last Flight Review or Equivalent: November 25, 2019
Flight Time: (Estimated) 639 hours (Total, all aircraft), 166 hours (Total, this make and model), 7 hours (Last 90 days, all aircraft), 3 hours (Last 30 days, all aircraft), 1 hours (Last 24 hours, all aircraft)

Aircraft and Owner/Operator Information

Aircraft Make: COOK
Registration: N1222C
Model/Series: SONEX 
Aircraft Category: Airplane
Year of Manufacture: 2016
Amateur Built: Yes
Airworthiness Certificate: Experimental (Special) 
Serial Number: 1662
Landing Gear Type: Tailwheel 
Seats: 2
Date/Type of Last Inspection: April 16, 2020 Annual 
Certified Max Gross Wt.:
Time Since Last Inspection:
Engines: Reciprocating
Airframe Total Time: 130 Hrs at time of accident 
Engine Manufacturer: Jabiru
ELT: C126 installed, activated, aided in locating accident
Engine Model/Series: 3300
Registered Owner: 
Rated Power: 120 Horsepower
Operator: On file
Operating Certificate(s) Held: None

Meteorological Information and Flight Plan

Conditions at Accident Site: Visual (VMC)
Condition of Light: Day
Observation Facility, Elevation: KCCB,1439 ft msl 
Distance from Accident Site: 0 Nautical Miles
Observation Time: 08:15 Local
Direction from Accident Site: 309°
Lowest Cloud Condition: Clear 
Visibility: 10 miles
Lowest Ceiling: None 
Visibility (RVR):
Wind Speed/Gusts: 3 knots / 
Turbulence Type Forecast/Actual: None / None
Wind Direction: 360°
Turbulence Severity Forecast/Actual: N/A / N/A
Altimeter Setting: 29.96 inches Hg
Temperature/Dew Point: 20°C / 9°C
Precipitation and Obscuration: No Obscuration; No Precipitation
Departure Point: Upland, CA (CCB)
Type of Flight Plan Filed: None
Destination: Upland, CA (CCB) 
Type of Clearance: None
Departure Time:
Type of Airspace: Class G

Airport Information

Airport: CABLE CCB 
Runway Surface Type: Asphalt
Airport Elevation: 1443 ft msl 
Runway Surface Condition: Dry
Runway Used: 24 IFR
Approach: None 
Runway Length/Width: 3863 ft / 75 ft
VFR Approach/Landing: None

Wreckage and Impact Information

Crew Injuries: 1 None 
Aircraft Damage: Substantial
Passenger Injuries:
Aircraft Fire: None
Ground Injuries: N/A
Aircraft Explosion: None
Total Injuries: 1 None
Latitude, Longitude: 34.110553,-117.681945(est)

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