# NTSB WPR09CA081: Parker 77, N60DE, Phoenix, AZ, January 9, 2009 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: January 9, 2009, 13:43 local (20:43 UTC) - Place: Phoenix, AZ - Coordinates: 33.688331, -112.082496 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=33.6883&lon=-112.0825&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 April 15, 2009 - Report: Approved by Office Director - NTSB office: Western Pacific Region - Parties: Federal Aviation Administration - NTSB case key (mKey): 73233 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR09CA081 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/73233/pdf - Page: https://openairdocs.org/ntsb/WPR09CA081 ## Probable cause The pilot's failure to maintain directional control during landing. Contributing to the accident was the pilot's improper application of brakes. ## 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: [Parker 77, 1 case](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=0564430), [All aircraft, 3,958 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md) - [Landing gear system: brake](https://openairdocs.org/ntsb-findings/01023242): Aircraft › Aircraft systems · Incorrect use/operation (probable cause); cases with it: [Parker 77, 1 case](https://openairdocs.org/ntsb-findings/01023242/cases.md?model=0564430), [All aircraft, 297 cases](https://openairdocs.org/ntsb-findings/01023242/cases.md) - [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Parker 77, 1 case](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=0564430), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md) - [Action: incorrect action performance](https://openairdocs.org/ntsb-findings/02041015): Personnel issues › Action/decision · Pilot (probable cause); cases with it: [Parker 77, 1 case](https://openairdocs.org/ntsb-findings/02041015/cases.md?model=0564430), [All aircraft, 1,386 cases](https://openairdocs.org/ntsb-findings/02041015/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: [Parker 77, 1 case](https://openairdocs.org/ntsb-events/230/sequence.md?model=0564430), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) ## Analysis The pilot reported that during rollout from a practice landing on runway 25L in his amateur-built, experimental biplane, he may have applied unequal toe brake pressure. The pilot stated that he lost directional control of the airplane, and while decelerating it swerved about 60 degrees sideways from the runway's centerline. During the mishap, the right main landing gear collapsed under the fuselage and the lower right wing impacted the runway. The pilot reported no mechanical failures with the airplane at the time of the accident. At the time, the surface wind was light and variable. A Federal Aviation Administration inspector examined the airplane and reported that the outboard portion of the lower right wing's aft spar was cracked. ## Factual narrative The pilot reported that during rollout from a practice landing on runway 25L in his amateur-built, experimental biplane, he may have applied unequal toe brake pressure. The pilot stated that he lost directional control of the airplane, and while decelerating, it swerved about 60 degrees sideways from the runway's centerline. During the mishap, the right main landing gear collapsed under the fuselage, and the lower right wing impacted the runway. The pilot reported no mechanical failures with the airplane at the time of the accident. At the time, the surface wind was light and variable. A Federal Aviation Administration inspector examined the airplane. He reported observing that the outboard portion of the lower right wing's aft spar was cracked. ## Aircraft - Registration: [N60DE](https://openairdocs.org/deregistered/N60DE-2022-04-02), registration cancelled 2022-04-02, S/N 1919, built 1977 (OpenAirDocs) - Reported make and model: PARKER 77 - Registry model: [Parker 77](https://openairdocs.org/model/parker-77) (registry code 0564430) (OpenAirDocs) - Registry engine: [Lycoming 0-290 series](https://openairdocs.org/engine/lycoming-0-290-series) (registry code 41506, 4 cycle) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: 1919 - Airframe hours: 272 - Engines: LYCOMING O-290 D2 135 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Special, Experimental (Special) - Last inspection: Condition, June 19, 2008, 5 hours before - Departed: DVT, Phoenix, AZ - Destination: DVT, Phoenix, AZ - Airport: DVT, Deer Valley, runway 25L, 8,197 × 100 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 71; injuries: none; airline transport, flight instructor, flight engineer; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 3, with waivers/limitations; last flight review February 1, 2008; seat: single; flight hours: 18,000 total, 30 in this make and model, 5 in the last 90 days, 1 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Visibility: 25 statute miles - Lowest ceiling: none - Temperature: 72 °F ## 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 20090109002059A](https://openairdocs.org/incident/20090109002059A), Jan 9, 2009: Parker 77, Phoenix, AZ, Substantial damage. (-23) The owner/pilot was doing touch and go landings for currency/proficiency. On the fifth landing, the pilot states he might have flared a little high, then… 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.