# NTSB WPR12CA187: Glass Roy L RV-6, N164RG, Coolidge, AZ, April 27, 2012

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Data collection · Final report
- Date: April 27, 2012, 09:30 local (16:30 UTC)
- Place: Coolidge, AZ
- Coordinates: 32.935832, -111.426391 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=32.9358&lon=-111.4264&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: 2 uninjured
- Status: Completed, report June 28, 2012
- Report: Approved by Office Director
- NTSB office: Western Pacific Region
- Parties: Federal Aviation Administration
- NTSB case key (mKey): 83499
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR12CA187
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/83499/pdf
- NTSB docket: https://data.ntsb.gov/Docket?ProjectID=83499
- Page: https://openairdocs.org/ntsb/WPR12CA187

## Probable cause

The pilot’s loss of directional control during landing.

## 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: [Glass Roy L RV-6, 1 case](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=056178F), [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: [Glass Roy L RV-6, 1 case](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=056178F), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/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: [Glass Roy L RV-6, 1 case](https://openairdocs.org/ntsb-events/230/sequence.md?model=056178F), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md)
- [Landing-landing roll: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Glass Roy L RV-6, 1 case](https://openairdocs.org/ntsb-events/470/sequence.md?model=056178F), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md)

## Analysis

The pilot reported that he was demonstrating stop-and-go landings to his passenger. During the second landing roll, the airplane began to swerve to the right. The pilot applied left rudder pedal and pulled the control stick aft. The airplane then ground looped to the left and came to rest upright. The rudder sustained substantial damage. The pilot reported no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operation.

## Factual narrative

The pilot reported that he was demonstrating stop-and-go takeoffs and landings to his passenger. During the second landing roll, the airplane began to swerve to the right. The pilot applied left rudder pedal and pulled the control stick aft. The airplane then ground looped to the left and came to rest upright. The rudder sustained substantial damage. The pilot reported no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operation.

## Aircraft

- Registration: [N164RG](https://openairdocs.org/aircraft/N164RG), registered now, S/N 60266, built 2005 (OpenAirDocs)
- Reported make and model: GLASS ROY L RV-6
- Registry model: [Glass Roy L RV-6](https://openairdocs.org/model/glass-roy-l-rv-6) (registry code 056178F) (OpenAirDocs)
- Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: 60266
- Airframe hours: 447
- Engines: LYCOMING O-320-D1A 160 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Condition, December 1, 2011, 32 hours before
- Departed: FFZ, Mesa, AZ
- Destination: P08, Coolidge, AZ
- Airport: P08, Coolidge, runway 05, 5,528 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 57; injuries: none; private; airplane ratings: single-engine land; medical: class 3, with waivers/limitations; last flight review February 10, 2011; seat: left; flight hours: 762 total, 546 in this make and model, 22 in the last 90 days, 8 in the last 30 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 72 °F, dew point 41 °F
- Altimeter: 30.00 inHg
- Observed at: CGZ, 17 nm away

## 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 20120427008559A](https://openairdocs.org/incident/20120427008559A), Apr 27, 2012: Glass Roy L RV-6, Coolidge, AZ, Substantial damage. Pilot lost control of the experimental RV-6 aircraft on the landing rollout and ground looped while landing at the Coolidge muni airport (P08) near Coolidge…

## Docket (1 files)

The files NTSB released with the investigation on May 22, 2012, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=83499. 1.3 MB in all.

- Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 1.3 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40367709&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.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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