Monday, May 27, 2019

Sys/Comp malf/fail (non-power): Cessna 180, N2469C, accident occurred July 01, 2018 at Rusty Allen Airport (KRYW), Lago Vista, Travis County, Texas

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

Additional Participating Entity:

Federal Aviation Administration / Flight Standards District Office; San Antonio, Texas

Aviation Accident Factual Report - National Transportation Safety Board:

Investigation Docket - National Transportation Safety Board:

Location: Lago Vista, TX
Accident Number: CEN18LA250
Date & Time: 07/01/2018, 2010 CDT
Registration: N2469C
Aircraft: Cessna 180
Aircraft Damage: Substantial
Defining Event: Sys/Comp malf/fail (non-power)
Injuries: 2 None
Flight Conducted Under: Part 91: General Aviation - Personal 

On July 1, 2018, about 2010 central daylight time, a Cessna 180 single-engine airplane, N2469C, was substantially damaged while landing at Rusty Allen Airport (RYW), Lago Vista, Texas. The airline transport pilot and passenger were not injured. The airplane was registered to and operated by the pilot under the provisions of Title 14 Code of Federal Regulations Part 91. Day visual meteorological conditions prevailed for the personal flight that departed Childress Municipal Airport (CDS), Childress, Texas, about 1740 with RYW as the intended destination.

According to the pilot, the surface wind was from 120° magnetic at 7 knots, gusting 17 knots, when he entered the traffic pattern for runway 15 at RYW. He noted that the wind direction became variable between 090° magnetic and 170° magnetic while the airplane was on the downwind leg. The pilot made a normal approach for three-point landing with a left crosswind correction; however, the airplane rolled left during the landing flare and landed hard on the left main landing gear. The pilot reported that the airplane bounced and that he was unable to regain roll control before the airplane landed hard again on the left main landing gear. The airplane bounced a second time and the left main landing gear spring separated from the fuselage on the third contact with the runway. The airplane subsequently ground-looped to the left and came to rest heading about 180° from the original runway direction. The left main wing spar was substantially damaged when the left wingtip impacted the runway.

The fractured left main landing gear spring was examined by the National Transportation Safety Board Materials Laboratory to determine if preexisting damage had contributed to its separation during the accident. The laboratory examination revealed a fracture surface that exhibited a relatively flat surface with a distinct shear lip along the periphery. Further examination of the fracture surface revealed a chevron pattern indicating the direction of crack propagation from a thumbnail shaped initiation point. The location of the fatigue crack was adjacent to where the landing gear fixation hardware contacted the landing gear spring. The initiation point exhibited features consistent with a multiple-origin fatigue crack. The approximate dimension of the fatigue crack was 0.14 inch wide and 0.04 inch deep.

The pilot stated that the airplane logbooks are not complete; however, there was no documented work on the left landing gear since the logbooks began in 1993. Based on the available information, the pilot estimated that the airplane had accumulated a total service time of about 4,101 hours. Based on a lack of complete maintenance documentation, it is unknown if the left main landing gear spring had been replaced or overhauled since new.

Pilot Information

Certificate: Airline Transport
Age: 73, Male
Airplane Rating(s): Multi-engine Land; Single-engine Land
Seat Occupied:  Left
Other Aircraft Rating(s): None
Restraint Used: 4-point
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: 05/21/2018
Occupational Pilot: No
Last Flight Review or Equivalent: 01/29/2018
Flight Time:  (Estimated) 16267 hours (Total, all aircraft), 270 hours (Total, this make and model), 14749 hours (Pilot In Command, all aircraft)

Aircraft and Owner/Operator Information

Aircraft Make: Cessna
Registration: N2469C 
Model/Series: 180
Aircraft Category: Airplane
Year of Manufacture: 1954
Amateur Built: No
Airworthiness Certificate: Normal
Serial Number: 30769
Landing Gear Type: Tailwheel
Seats: 4
Date/Type of Last Inspection: 04/23/2018, Annual
Certified Max Gross Wt.: 2550 lbs
Time Since Last Inspection: 37 Hours
Engines: 1 Reciprocating
Airframe Total Time: 4101 Hours at time of accident
Engine Manufacturer: Continental
ELT: C126 installed, activated, did not aid in locating accident
Engine Model/Series: O-470-J
Registered Owner: On file
Rated Power: 225 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: RYW, 1230 ft msl
Distance from Accident Site: 0 Nautical Miles
Observation Time: 2015 CDT
Direction from Accident Site:
Lowest Cloud Condition: Clear
Visibility:  10 Miles
Lowest Ceiling: None
Visibility (RVR):
Wind Speed/Gusts: 9 knots / 16 knots
Turbulence Type Forecast/Actual: None / None
Wind Direction: 150°
Turbulence Severity Forecast/Actual: N/A / N/A
Altimeter Setting: 29.95 inches Hg
Temperature/Dew Point: 33°C / 16°C
Precipitation and Obscuration: No Obscuration; No Precipitation
Departure Point: Childress, TX (CDS)
Type of Flight Plan Filed: None
Destination: Lago Vista, TX (RYW)
Type of Clearance: None
Departure Time: 1740 CDT
Type of Airspace: Class G

Airport Information

Airport: Rusty Allen Airport (RYW)
Runway Surface Type: Asphalt
Airport Elevation: 1230 ft
Runway Surface Condition: Dry
Runway Used: 15
IFR Approach: None
Runway Length/Width: 3808 ft / 50 ft
VFR Approach/Landing: Traffic Pattern 

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: 30.498611, -97.969444 (est)

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