Wednesday, June 19, 2019

Aerodynamic Stall: Tecnam P2002 Sierra, N75SY, accident occurred July 05, 2018 at San Carlos Airport (KSQL), San Mateo County, California

Additional Participating Entity: 
Federal Aviation Administration / Flight Standards District Office; San Jose, California 

Aviation Accident Final Report - National Transportation Safety Board:

Aviation Accident Data Summary - National Transportation Safety Board:

Investigation Docket - National Transportation Safety Board:

Location: San Carlos, CA 
Accident Number: GAA18CA395
Date & Time: 07/05/2018, 1530 PDT
Registration: N75SY
Aircraft Damage: Substantial
Defining Event: Aerodynamic stall/spin
Injuries: 1 None
Flight Conducted Under: Part 91: General Aviation - Personal


The pilot reported that, while landing in a crosswind, the approach was "too low," and he added power. The airplane then "rolled and veered" left. He added that marks on the terrain indicated that the left wing struck the ground, and tracks showed that the airplane touched down on the pavement before the runway threshold. The airplane then exited the runway, the nose landing gear collapsed, and the airplane came to rest nose down.

The airplane sustained substantial damage to the engine mount, left wing, and fuselage.

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

The automated weather observation system located at the airport reported that, about the time of the accident, the wind was from 330° at 8 knots. The pilot landed the airplane on runway 30. 

Probable Cause and Findings

The National Transportation Safety Board determines the probable cause(s) of this accident to be:
The pilot's failure to maintain a proper glidepath and crosswind correction during landing, which resulted in an aerodynamic stall.


Descent/approach/glide path - Not attained/maintained (Cause)
Crosswind correction - Not attained/maintained (Cause)

Personnel issues
Aircraft control - Pilot (Cause)

Environmental issues
Crosswind - Response/compensation (Cause)
Crosswind - Effect on operation

Factual Information

History of Flight

Approach-VFR go-around
Aerodynamic stall/spin (Defining event)

Landing area undershoot
Runway excursion
Landing gear collapse
Nose over/nose down

Pilot Information

Certificate: Private
Age: 72, Male
Airplane Rating(s): Single-engine Land
Seat Occupied:Left 
Other Aircraft Rating(s): None
Restraint Used: Unknown
Instrument Rating(s): None
Second Pilot Present: No
Instructor Rating(s): None
Toxicology Performed: No
Medical Certification: Sport Pilot
Last FAA Medical Exam:
Occupational Pilot: No
Last Flight Review or Equivalent: 07/23/2016
Flight Time:  (Estimated) 802 hours (Total, all aircraft), 277 hours (Total, this make and model), 802 hours (Pilot In Command, all aircraft), 9 hours (Last 90 days, all aircraft), 3 hours (Last 30 days, all aircraft) 

Aircraft and Owner/Operator Information

Registration: N75SY
Model/Series: P2002 SIERRA
Aircraft Category: Airplane
Year of Manufacture: 2008
Amateur Built: No
Airworthiness Certificate: Special Light-Sport
Serial Number: 359
Landing Gear Type: Tricycle
Seats: 2
Date/Type of Last Inspection: 02/15/2018, Annual
Certified Max Gross Wt.: 1320 lbs
Time Since Last Inspection:
Engines: 1 Reciprocating
Airframe Total Time: 355.1 Hours at time of accident
Engine Manufacturer: Rotax
ELT: Installed, not activated
Engine Model/Series: 912ULS
Registered Owner: On file
Rated Power: 100 hp
Operator: On file
Operating Certificate(s) Held: None

Meteorological Information and Flight Plan

Conditions at Accident Site: Visual Conditions
Condition of Light: Day
Observation Facility, Elevation: KSQL, 5 ft msl
Distance from Accident Site: 0 Nautical Miles
Observation Time: 2247 UTC
Direction from Accident Site: 7°
Lowest Cloud Condition: Clear
Visibility:  10 Miles
Lowest Ceiling: None
Visibility (RVR):
Wind Speed/Gusts: 8 knots /
Turbulence Type Forecast/Actual: None / None
Wind Direction: 330°
Turbulence Severity Forecast/Actual: N/A / N/A
Altimeter Setting: 30.12 inches Hg
Temperature/Dew Point: 23°C / 12°C
Precipitation and Obscuration: No Obscuration; No Precipitation
Departure Point: San Carlos, CA (SQL)
Type of Flight Plan Filed: None
Destination: San Carlos, CA (SQL)
Type of Clearance: None
Departure Time: 1500 PDT
Type of Airspace: Class D

Airport Information

Runway Surface Type: Asphalt
Airport Elevation:5 ft 
Runway Surface Condition:Dry 
Runway Used: 30
IFR Approach: None
Runway Length/Width: 2600 ft / 75 ft
VFR Approach/Landing: Full Stop

Wreckage and Impact Information

Crew Injuries: 1 None
Aircraft Damage: Substantial
Passenger Injuries: N/A
Aircraft Fire: None
Ground Injuries: N/A
Aircraft Explosion: None
Total Injuries: 1 None
Latitude, Longitude: 37.515278, -122.250278 (est)

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