Saturday, June 10, 2017

Swearingen SA227-TT, N53DA: Accident occurred March 12, 2017 at Santa Monica Airport (KNSO), California and Incident occurred October 17, 2016 at Hayward Executive Airport (KHWD), Alameda County, California

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

Aviation Accident Final Report - National Transportation Safety Board:

Investigation Docket - National Transportation Safety Board:
Extant LLC
c/o:  Meridan Aviation Inc:

Location: Santa Monica, CA
Accident Number: GAA17CA333
Date & Time: 03/12/2017, 1224 PDT
Registration: N53DA
Aircraft Damage: Substantial
Defining Event: Hard landing
Injuries: 2 None
Flight Conducted Under:  Part 91: General Aviation - Personal


The pilot reported that, while on short final following a jet airplane, the airplane "encountered turbulence that induced significant rolling." He added that the airplane "was not able to completely re-establish a stabilized approach prior to touching down." Subsequently, the airplane touched down "more firm than usual." The pilot taxied the airplane to the ramp without further incident.

The airplane sustained substantial damage to the fuselage.

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

Probable Cause and Findings

The National Transportation Safety Board determines the probable cause(s) of this accident to be:
The pilot's unstabilized approach after encountering wake turbulence, which resulted in a hard landing.


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

Personnel issues
Aircraft control - Pilot (Cause)

Environmental issues
Wake turbulence - Effect on operation

Factual Information

History of Flight

Aircraft wake turb encounter


Hard landing (Defining event)

Pilot Information

Certificate: Commercial
Age: 52, Male
Airplane Rating(s): Multi-engine Land; Single-engine Land
Seat Occupied: Unknown
Other Aircraft Rating(s): None
Restraint Used: Unknown
Instrument Rating(s): Airplane
Second Pilot Present: No
Instructor Rating(s): None
Toxicology Performed: No
Medical Certification: Class 2 With Waivers/Limitations
Last FAA Medical Exam: 07/29/2016
Occupational Pilot: No
Last Flight Review or Equivalent: 10/13/2016
Flight Time: (Estimated) 4900 hours (Total, all aircraft), 410 hours (Total, this make and model), 4700 hours (Pilot In Command, all aircraft), 102 hours (Last 90 days, all aircraft), 32 hours (Last 30 days, all aircraft), 2 hours (Last 24 hours, all aircraft)

Aircraft and Owner/Operator Information

Aircraft Manufacturer: SWEARINGEN
Registration: N53DA
Model/Series: SA227 TT TT
Aircraft Category: Airplane
Year of Manufacture: 1981
Amateur Built: No
Airworthiness Certificate: Normal
Serial Number: TT-438
Landing Gear Type: Retractable - Tricycle
Seats: 12
Date/Type of Last Inspection:  Unknown
Certified Max Gross Wt.: 12500 lbs
Time Since Last Inspection:
 Engines: 2 Turbo Prop
Airframe Total Time: 
Engine Manufacturer: AIRESEARCH
ELT: Installed, not activated
Engine Model/Series: TPE331
Registered Owner: EXTANT LLC.
Rated Power: 904 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: KSMO, 174 ft msl
Observation Time: 1851 UTC
Distance from Accident Site: 0 Nautical Miles
Direction from Accident Site: 45°
Lowest Cloud Condition: Clear
Temperature/Dew Point: 18°C / 13°C
Lowest Ceiling: None
Visibility:  5 Miles
Wind Speed/Gusts, Direction: 7 knots, 200°
Visibility (RVR): 
Altimeter Setting: 30.03 inches Hg
Visibility (RVV): 
Precipitation and Obscuration: Moderate - Haze; No Obscuration; No Precipitation
Departure Point: PALM SPRINGS, CA (PSP)
Type of Flight Plan Filed: IFR
Destination: Santa Monica, CA (SMO)
Type of Clearance:  IFR
Departure Time: 1151 PDT
Type of Airspace: Class D

Airport Information

Runway Surface Type: Asphalt
Airport Elevation: 177 ft
Runway Surface Condition: Dry
Runway Used: 21
IFR Approach: Global Positioning System
Runway Length/Width: 4973 ft / 150 ft
VFR Approach/Landing: Full Stop

Wreckage and Impact Information

Crew Injuries: 1 None
Aircraft Damage: Substantial
Passenger Injuries: 1 None
Aircraft Fire: None
Ground Injuries: N/A
Aircraft Explosion:  None
Total Injuries: 2 None

Latitude, Longitude:  34.015000, -118.452222 (est)

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

Aircraft on takeoff roll, skidded off the runway into the grass.

Date: 17-OCT-16
Time: 21:02:00Z
Regis#: N53DA
Aircraft Make: SWEARINGEN
Aircraft Model: SA227
Event Type: Incident
Highest Injury: None
Damage: None
Flight Phase: UNKNOWN (UNK)

State: California

HAYWARD (KRON) — Crews responded to an airplane that made an emergency landing at the Hayward Executive Airport Monday afternoon, according to the Hayward fire department.

According to the Federal Aviation Administration, a Swearingen SA227-TT veered off of runway 28 at 1:00 p.m.

Hayward fire crews said, the plane had to make the abrupt landing due to the brakes on the plane locking up.

The plane landed on grass area near the runway. 

Airport officials had to tow the plane off the grass because the brakes were extremely hot, and they were concerned that a fire would erupt.

According to fire crews, no injuries were reported and fire crews will stay on the scene as a precaution.

The FAA has announced that they will be investigating the cause of the landing.


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