Wednesday, April 4, 2018

Stinson 108-2 Voyager, N927D: Accident occurred October 26, 2017 at Lewiston–Nez Perce County Airport (KLWS), Idaho

Additional Participating Entity:
Federal Aviation Administration / Flight Standards District Office; Seattle, Washington

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


Investigation Docket - National Transportation Safety Board: https://dms.ntsb.gov/pubdms


http://registry.faa.gov/N927D

Analysis

According to the pilot in the tailwheel-equipped airplane, this was his first solo flight in the airplane. During the landing roll, the airplane decelerated and veered to the left. The pilot reported that he overcorrected, and the airplane veered to the right. The airplane exited the runway, and the left wing struck the ground during the right ground loop.

The airplane sustained substantial damage to the left-wing spar and aileron.

The METAR at the accident airport reported that, about the time of the accident, the wind was calm, and the sky was clear.

The pilot noted in the National Transportation Safety Board's Pilot Aviation Accident Report Operator/Owner Safety Recommendation section that this type of accident could have been prevented if he had "flown with a properly rated pilot (tailwheel endorsed) and practiced landings before flying…solo."

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 failure to maintain directional control during the landing roll. Contributing to the accident was the pilot's failure to obtain appropriate training in the airplane before flying solo.

Findings

Aircraft
Directional control - Not attained/maintained (Cause)

Personnel issues
Aircraft control - Pilot (Cause)
Training with equipment - Pilot (Cause)

Factual Information

History of Flight

Landing-landing roll
Loss of control on ground
Runway excursion
Collision with terr/obj (non-CFIT)

Location: Lewiston, ID
Accident Number: GAA18CA028
Date & Time: 10/26/2017, 1230 PST
Registration: N927D
Aircraft: STINSON 108
Aircraft Damage: Substantial
Defining Event: Loss of control on ground
Injuries: 1 None
Flight Conducted Under:  Part 91: General Aviation - Personal 

According to the pilot in the tailwheel-equipped airplane, this was his first solo flight in the airplane.

During the landing roll, the airplane decelerated and veered to the left. The pilot reported that he over corrected and the airplane veered to the right. The airplane exited the runway and the left wing struck the ground during the right ground loop.

The airplane sustained substantial damage to the left-wing spar and aileron.

The METAR at the accident airport, reported that about the time of the accident, the wind was calm, and the sky was clear.

The National Transportation Safety Board's Pilot Aviation Accident Report identified in the Operator/Owner Safety Recommendation Section, that this type of accident could have been prevented if he had, "flown with a properly rated pilot (tailwheel endorsed) and practiced landings before flying… solo."

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

Pilot Information

Certificate: Flight Instructor; Commercial
Age: 40, Male
Airplane Rating(s): Multi-engine Land; Single-engine Land
Seat Occupied: Front
Other Aircraft Rating(s): None
Restraint Used: Lap Only
Instrument Rating(s): Airplane
Second Pilot Present: No
Instructor Rating(s): Airplane Single-engine
Toxicology Performed: No
Medical Certification: Class 3 Without Waivers/Limitations
Last FAA Medical Exam: 07/31/2013
Occupational Pilot: No
Last Flight Review or Equivalent: 08/28/2017
Flight Time:  (Estimated) 763 hours (Total, all aircraft), 1 hours (Total, this make and model), 695 hours (Pilot In Command, all aircraft), 46 hours (Last 90 days, all aircraft), 15 hours (Last 30 days, all aircraft), 3 hours (Last 24 hours, all aircraft) 

Aircraft and Owner/Operator Information

Aircraft Manufacturer: STINSON
Registration: N927D
Model/Series: 108 2
Aircraft Category: Airplane
Year of Manufacture: 1947
Amateur Built: No
Airworthiness Certificate: Normal
Serial Number: 108-2927
Landing Gear Type: Tailwheel
Seats: 2
Date/Type of Last Inspection: 06/18/2017, Annual
Certified Max Gross Wt.: 2400 lbs
Time Since Last Inspection:
Engines: 1 Reciprocating
Airframe Total Time: 1585 Hours as of last inspection
Engine Manufacturer: FRANKLIN
ELT: C91  installed, not activated
Engine Model/Series: 6A4165 SERIES
Registered Owner: On file
Rated Power: 165 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: KLWS, 1436 ft msl
Observation Time: 1929 UTC
Distance from Accident Site: 0 Nautical Miles
Direction from Accident Site: 318°
Lowest Cloud Condition: Clear
Temperature/Dew Point: 16°C / 9°C
Lowest Ceiling: None
Visibility: 10 Miles
Wind Speed/Gusts, Direction: Calm
Visibility (RVR):
Altimeter Setting: 30.29 inches Hg
Visibility (RVV):
Precipitation and Obscuration: No Obscuration; No Precipitation
Departure Point: Lewiston, ID (KLWS)
Type of Flight Plan Filed: None
Destination: Lewiston, ID (LWS)
Type of Clearance: VFR
Departure Time: 1130 PST
Type of Airspace: Class D

Airport Information

Airport: LEWISTON-NEZ PERCE COUNTY (LWS)
Runway Surface Type: Asphalt
Airport Elevation: 1441 ft
Runway Surface Condition: Dry
Runway Used: 30
IFR Approach: None
Runway Length/Width: 5002 ft / 100 ft
VFR Approach/Landing: Full Stop; Straight-in

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: 46.374444, -117.015278 (est)

No comments: