# NTSB WPR22LA051: Travel Air 4-D, N476N, Riverside, CA, November 30, 2021 - Type: NTSB accident investigation - Classification: Accident · No injuries · Class 4 · Limited · Final report - Date: November 30, 2021, 13:30 local (21:30 UTC) - Place: Riverside, CA - Coordinates: 33.5703, -117.2647 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=33.5703&lon=-117.2647&mi=10 - Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping) - Defining event: [Taxi: Loss of control on ground](https://openairdocs.org/ntsb-events/230) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed - Report: Approved by Office Director - Investigation class: Class 4 - Basic report with no Prelim publish - NTSB office: Western Pacific Region - Parties: Riverside FSDO - NTSB case key (mKey): 104337 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR22LA051 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/104337/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=104337 - Page: https://openairdocs.org/ntsb/WPR22LA051 ## Probable cause The pilot's failure to abort a high-speed taxi in time before the airplane exited the end of the airstrip which resulted in the pilot’s over application of the brakes and subsequent nose over. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Travel Air 4-D, 1 case](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=2621010), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md) - [Info processing/decision: decision making/judgment](https://openairdocs.org/ntsb-findings/02041520): Personnel issues › Action/decision · Pilot (probable cause); cases with it: [Travel Air 4-D, 1 case](https://openairdocs.org/ntsb-findings/02041520/cases.md?model=2621010), [All aircraft, 3,098 cases](https://openairdocs.org/ntsb-findings/02041520/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Taxi: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [Travel Air 4-D, 1 case](https://openairdocs.org/ntsb-events/230/sequence.md?model=2621010), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) - [Taxi: Attempted remediation/recovery](https://openairdocs.org/ntsb-events/060); cases with it: [Travel Air 4-D, 1 case](https://openairdocs.org/ntsb-events/060/sequence.md?model=2621010), [All aircraft, 1,422 cases](https://openairdocs.org/ntsb-events/060/sequence.md) - [Taxi: Nose over/nose down](https://openairdocs.org/ntsb-events/096); cases with it: [Travel Air 4-D, 1 case](https://openairdocs.org/ntsb-events/096/sequence.md?model=2621010), [All aircraft, 2,287 cases](https://openairdocs.org/ntsb-events/096/sequence.md) - [Landing-landing roll: Runway excursion](https://openairdocs.org/ntsb-events/300); cases with it: [Travel Air 4-D, 1 case](https://openairdocs.org/ntsb-events/300/sequence.md?model=2621010), [All aircraft, 3,643 cases](https://openairdocs.org/ntsb-events/300/sequence.md) ## Analysis The pilot reported that, he was going to conduct a high-speed taxi before taxing back to takeoff. During the high-speed taxi, about 2/3 of the way down the grass airstrip, the pilot reduced power and began to slow down. The asphalt overrun approached faster than he expected as the airplane over ran the grass airstrip onto the asphalt run-up area. The pilot overly applied the brakes which resulted in the airplane nosing over and coming to rest inverted. The outboard struts, rudder and engine mount were substantially damaged. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. ## Aircraft - Registration: [N476N](https://openairdocs.org/aircraft/N476N), registered now, S/N 1366 (OpenAirDocs) - Reported make and model: TRAVEL AIR 4-D - Registry model: [Travel Air 4-D](https://openairdocs.org/model/travel-air-4-d) (registry code 2621010) (OpenAirDocs) - Category: Airplane - Serial number: 1366 - Year built: 1929 - Airframe hours: 1071 - Engines: Wright R-760 235 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: Zieler Richard - Registered owner: Zieler Richard - Airworthiness certificate: Standard, Normal - Last inspection: Continuous airworthiness, October 29, 2021 - Airport: RIR, Flabob, runway 06, 2,040 × 100 ft, grass/turf - Equipment: ADS-B ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 78; injuries: none; commercial; airplane ratings: single-engine land, single-engine sea, multi-engine land; instrument ratings: airplane; medical: class 2; last flight review July 22, 2021; seat: rear; restraint: 3-point; flight hours: 5,062 total, 408 in this make and model, 3,246 as pilot in command, 11 in the last 90 days, 6 in the last 30 days, 0 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 30° at 7 knots, gusting 14 - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 72 °F, dew point 21 °F - Altimeter: 30.01 inHg - Observed at: KRIR - METAR: SA 30/11/2021 21:53-> METAR KRAL 302153Z VRB06G21KT 10SM CLR 32/M06 A2997 RMK AO2 SLP133 T03171056= ## 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 20211130020879A](https://openairdocs.org/incident/20211130020879A), Nov 30, 2021: Travel Air 4-D, Jurupa Valley, CA, Substantial damage. Accident involves an attempted high-speed taxi "shake-down" of a newly restored antique aircraft. The pilot's intention was to enter a grass infield area for a… ## Docket (3 files) The files NTSB released with the investigation on March 16, 2022, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=104337. 2.4 MB in all. - Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 9 pages, 1.7 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=13133235&FileExtension=pdf&FileName=01%20NTSB%20Form%206120_1_FlatRedacted-Rel.pdf - Record of conversation (pilot) (item 2, PDF, 1 page, 156 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=13373095&FileExtension=pdf&FileName=04%20Blank%20Record%20of%20Conversation%20508%20Phone-Rel.pdf - Photo (item 3, PDF, 1 page, 1 photo, 534 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=13137465&FileExtension=pdf&FileName=Photo%201-Rel.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. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.