# NTSB WPR10CA061: Boeing A75N1, N56099, Deer Valley, AZ, November 21, 2009 - Type: NTSB accident investigation - Classification: Accident · Minor injuries · Data collection · Final report - Date: November 21, 2009, 12:30 local (19:30 UTC) - Place: Deer Valley, AZ - Coordinates: 33.688056, -112.082496 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=33.6881&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: Minor injuries - Injuries: 1 minor - Status: Completed, report March 23, 2010 - Report: Approved by Office Director - NTSB office: Western Pacific Region - Parties: Federal Aviation Administration - NTSB case key (mKey): 75080 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR10CA061 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/75080/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=75080 - Page: https://openairdocs.org/ntsb/WPR10CA061 ## Probable cause The pilot's failure to maintain directional control. ## 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: [All aircraft, 3,958 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md) - [Landing gear system: main gear strut/axle/truck](https://openairdocs.org/ntsb-findings/01023213): Aircraft › Aircraft systems · Inoperative; cases with it: [All aircraft, 86 cases](https://openairdocs.org/ntsb-findings/01023213/cases.md) - [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [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: [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) - [Landing-landing roll: Runway excursion](https://openairdocs.org/ntsb-events/300); cases with it: [All aircraft, 3,643 cases](https://openairdocs.org/ntsb-events/300/sequence.md) ## Analysis The pilot stated that the airplane touched down on the runway smoothly. As the pilot was slowing the airplane the left wing remained high, and the airplane was veering right. He applied left aileron and a burst of power, but the airplane continued to veer right. The airplane went off the right side of the runway and nosed over. The pilot stated that he believes the left landing gear oleo did not compress during the landing touchdown. ## Factual narrative The pilot stated that the airplane touched down on the runway smoothly. As he was slowing the airplane the left wing remained high, and the airplane was veering right. He applied left aileron and a burst of power, but the airplane continued to veer right. The airplane went off the right side of the runway and nosed over. The pilot stated that he believes the left landing gear oleo did not compress during the landing touchdown. ## Aircraft - Registration: N56099 (not matched to a registry record) - Reported make and model: BOEING A75N1 - Category: Airplane - Serial number: 75-873 - Airframe hours: 7257 - Engines: CONT MOTOR W670-6N 220 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: Pollack Jack - Registered owner: Pollack Jack - Airworthiness certificate: Standard, Aerobatic; Standard, Normal - Last inspection: Annual, January 28, 2008 - Departed: KDVT, Deer Valley, AZ - Destination: KDVT, Deer Valley, AZ - Airport: KDVT, Deer Valley, runway 07L, 8,200 × 100 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 59; injuries: minor; commercial, private; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, without waivers/limitations; last flight review December 31, 2008; seat: rear; flight hours: 2,400 total, 450 in this make and model ## Weather - Conditions: Visual (VMC), Day - Wind: calm - Visibility: 41 statute miles - Lowest ceiling: none - Temperature: 72 °F, dew point 19 °F - Altimeter: 29.87 inHg - Observed at: KDVT ## 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 20091121022509A](https://openairdocs.org/incident/20091121022509A), Nov 21, 2009: Boeing A75N1, Phoenix, AZ, Substantial damage. Pilot landed on runway 7R. Left landing gear strut did not fully compress. During rollout aircraft continued off the right side of runway and flipped over.… ## Docket (2 files) The files NTSB released with the investigation on December 22, 2009, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=75080. 203 KB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 192 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40323225&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.PDF - Record of Conversation With the Pilot (item 2, .PDF, 11 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40323195&FileExtension=.PDF&FileName=Record%20of%20Conversation%20With%20the%20Pilot-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. --- 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.