# NTSB WPR14CA221: Boeing A75N1(PT17), N505V, McCall, ID, June 3, 2014

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Data collection · Final report
- Date: June 3, 2014, 12:00 local (18:00 UTC)
- Place: McCall, ID
- Coordinates: 45.069042, -115.969451 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=45.0690&lon=-115.9695&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Defining event: [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report September 24, 2014
- Report: Approved by Office Director
- NTSB office: Western Pacific Region
- Parties: FAA FSDO
- NTSB case key (mKey): 89349
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR14CA221
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/89349/pdf
- NTSB docket: https://data.ntsb.gov/Docket?ProjectID=89349
- Page: https://openairdocs.org/ntsb/WPR14CA221

## Probable cause

Loss of directional control during landing rollout due to a wind disturbance, which resulted in a runway veeroff and impact with a ditch.

## Findings

NTSB's coded findings; those marked are part of the probable cause.

- [Performance/control parameters: directional control](https://openairdocs.org/ntsb-findings/01062020): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [Boeing A75N1(PT17), 27 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=1380134), [All aircraft, 3,958 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md)
- [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Boeing A75N1(PT17), 33 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=1380134), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md)
- [Wind: variable wind](https://openairdocs.org/ntsb-findings/03034025): Environmental issues › Conditions/weather/phenomena · Effect on operation; cases with it: [Boeing A75N1(PT17), 2 cases](https://openairdocs.org/ntsb-findings/03034025/cases.md?model=1380134), [All aircraft, 113 cases](https://openairdocs.org/ntsb-findings/03034025/cases.md)
- [Terrain: sloped/uneven terrain](https://openairdocs.org/ntsb-findings/03021017): Environmental issues › Physical environment · Contributed to outcome; cases with it: [Boeing A75N1(PT17), 1 case](https://openairdocs.org/ntsb-findings/03021017/cases.md?model=1380134), [All aircraft, 270 cases](https://openairdocs.org/ntsb-findings/03021017/cases.md)

## Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event best describes what happened.

- [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [Boeing A75N1(PT17), 32 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=1380134), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md)
- [Landing-landing roll: Attempted remediation/recovery](https://openairdocs.org/ntsb-events/060); cases with it: [Boeing A75N1(PT17), 7 cases](https://openairdocs.org/ntsb-events/060/sequence.md?model=1380134), [All aircraft, 1,422 cases](https://openairdocs.org/ntsb-events/060/sequence.md)
- [Landing-landing roll: Runway excursion](https://openairdocs.org/ntsb-events/300); cases with it: [Boeing A75N1(PT17), 14 cases](https://openairdocs.org/ntsb-events/300/sequence.md?model=1380134), [All aircraft, 3,643 cases](https://openairdocs.org/ntsb-events/300/sequence.md)

## Analysis

The owner-pilot departed his home airport in the tailwheel-equipped airplane for a personal local flight. He spent about 45 minutes conducting airwork, and then returned for some practice landings and takeoffs, the first three of which were uneventful. According to the pilot, the ASOS (automated surface observing system) broadcast stated that the wind was from 220 degrees at 10 knots, so he selected runway 16 for the fourth landing. The pilot reported that he lost directional control during the landing rollout due to a wind disturbance. The airplane exited the east side of the runway, struck a ditch, and upended onto its nose. The right outboard wing was substantially damaged. Initial review of the recorded hourly wind data suggested that the winds were variable. The high resolution wind data revealed that the wind speed and direction both varied significantly in the minutes surrounding the accident time. The pilot reported no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operation.

## Factual narrative

The owner-pilot departed his home airport in the tailwheel-equipped airplane for a personal local flight. He spent about 45 minutes conducting airwork, and then returned for some practice landings and takeoffs, the first three of which were uneventful. According to the pilot, the ASOS (automated surface observing system) broadcast stated that the wind was from 220 degrees at 10 knots, so he selected runway 16 for the fourth landing. The pilot reported that he lost directional control during the landing rollout due to a wind disturbance. The airplane exited the east side of the runway, struck a ditch, and upended onto its nose. The right outboard wing was substantially damaged. Initial review of the recorded hourly wind data suggested that the winds were variable. The high resolution wind data revealed that the wind speed and direction both varied significantly in the minutes surrounding the accident time. The pilot reported no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operation.

## Aircraft

- Registration: [N505V](https://openairdocs.org/aircraft/N505V), registered now, S/N 75-2732, built 1943 (OpenAirDocs)
- Reported make and model: BOEING A75N1(PT17)
- Registry model: [Boeing A75N1(PT17)](https://openairdocs.org/model/boeing-a75n1-pt17) (registry code 1380134) (OpenAirDocs)
- Registry engine: [Continental W670 series](https://openairdocs.org/engine/continental-w670-series) (registry code 17018, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 75-2732
- Year built: 1943
- Airframe hours: 3251
- Engines: Continental 66706N 220 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Airworthiness certificate: Standard, Aerobatic
- Last inspection: Annual, November 1, 2013, 12 hours before
- Departed: MYL, McCall, ID
- Destination: MYL, McCall, ID
- Airport: MYL, McCall Municipal, runway 16, 6,107 × 75 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 78; injuries: none; commercial; airplane ratings: single-engine land; medical: class 3, with waivers/limitations; last flight review August 28, 2013; seat: rear; restraint: 4-point; flight hours: 3,200 total, 169 in this make and model, 2,518 as pilot in command, 8 in the last 90 days, 8 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: variable at 6 knots, gusting 15
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 66 °F, dew point 30 °F
- Altimeter: 29.94 inHg
- Observed at: MYL

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 20140603008309A](https://openairdocs.org/incident/20140603008309A), Jun 3, 2014: Boeing A75N1(PT17), Mccall, ID, Substantial damage. Pilot was out flying for an hour doing airwork. Pilot returned to the airport to do some touch and goes. The pilot reported the wind was variable and on the…

## Docket (9 files)

The files NTSB released with the investigation on September 4, 2014, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=89349. 5.9 MB in all.

- Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 3.3 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40416012&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.PDF
- Airport Information (item 2, .PDF, 176 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40416013&FileExtension=.PDF&FileName=Airport%20Information-Master.PDF
- Email re-Accident Time (item 3, .PDF, 205 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40416014&FileExtension=.PDF&FileName=Email%20re-Accident%20Time-Redacted.PDF
- METAR's (item 4, .PDF, 135 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40416015&FileExtension=.PDF&FileName=METAR%27s-Master.PDF
- Wind Data (item 5, XLSX, 27 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40416016&FileExtension=xlsx&FileName=Wind%20Data-Master
- Wind Plot (item 6, .PDF, 188 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40416017&FileExtension=.PDF&FileName=Wind%20Plot-Master.PDF
- Photo 1 - Airplane at Scene (Photo Courtesy of KMYL) (item 7, .PDF, 1.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40416018&FileExtension=.PDF&FileName=Photo%201%20-%20Airplane%20at%20Scene%20(Photo%20Courtesy%20of%20KMYL)-Master.PDF
- Photo 2 - Skid Marks (Photo Courtesy of KMYL) (item 8, .PDF, 315 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40416019&FileExtension=.PDF&FileName=Photo%202%20-%20Skid%20Marks%20(Photo%20Courtesy%20of%20KMYL)-Master.PDF
- Photo 3 - Wing Damage (Photo Courtesy of FAA) (item 9, .PDF, 307 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40416020&FileExtension=.PDF&FileName=Photo%203%20-%20Wing%20Damage%20(Photo%20Courtesy%20of%20FAA)-Master.PDF

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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