# NTSB WPR10CA167: Piper PA-18-150, N4425Z, Okanogan, WA, March 17, 2010 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: March 17, 2010, 11:30 local (18:30 UTC) - Place: Okanogan, WA - Coordinates: 48.374168, -119.616386 - Nearby events: https://openairdocs.org/map.md?lat=48.3742&lon=-119.6164&mi=10 - Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping) - Defining event: [Takeoff: Collision during takeoff/land](https://openairdocs.org/ntsb-events/490) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report July 1, 2010 - Report: Approved by Office Director - NTSB office: Western Pacific Region - Parties: Federal Aviation Administration FSDO - NTSB case key (mKey): 75548 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR10CA167 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/75548/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=75548 - Page: https://openairdocs.org/ntsb/WPR10CA167 ## Probable cause The pilot's failure to maintain clearance from a fence at the end of the runway. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Object/animal/substance: fence/fence post](https://openairdocs.org/ntsb-findings/03022047): Environmental issues › Physical environment · Response/compensation (probable cause); cases with it: [Piper PA-18-150, 5 cases](https://openairdocs.org/ntsb-findings/03022047/cases.md?model=7101828), [All aircraft, 313 cases](https://openairdocs.org/ntsb-findings/03022047/cases.md) - [Action: incorrect action performance](https://openairdocs.org/ntsb-findings/02041015): Personnel issues › Action/decision · Pilot (probable cause); cases with it: [Piper PA-18-150, 12 cases](https://openairdocs.org/ntsb-findings/02041015/cases.md?model=7101828), [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. - [Takeoff: Collision during takeoff/land](https://openairdocs.org/ntsb-events/490) (defining event); cases with it: [Piper PA-18-150, 25 cases](https://openairdocs.org/ntsb-events/490/sequence.md?model=7101828), [All aircraft, 1,309 cases](https://openairdocs.org/ntsb-events/490/sequence.md) ## Analysis The pilot said that he was practicing touch-and-go landings. After one of the takeoffs, he pulled the throttle back to practice an aborted takeoff from an altitude of 50 feet above ground level (agl). He lowered the flaps and performed a three-point landing. He added power for takeoff again, but had only climbed 3 feet agl before impacting a 4-foot fence at the end of the 3,675-foot-long gravel runway. The airplane came to rest upright with its left main landing gear bent back under the fuselage. The left wing sustained structural damage. ## Factual narrative The pilot said that he was practicing touch-and-go landings. After one of the takeoffs, he pulled the throttle back to practice an aborted takeoff from an altitude of 50 feet above ground level (agl). He lowered the flaps and performed a three-point landing. He added power for takeoff again, but had only climbed 3 feet agl before impacting a 4-foot fence at the end of the 3,675-foot-long gravel runway. The airplane came to rest upright with its left main landing gear bent back under the fuselage. The left wing sustained structural damage. ## Aircraft - Registration: [N4425Z](https://openairdocs.org/aircraft/N4425Z), registered now, S/N 18-8762, built 1968 (OpenAirDocs) - Reported make and model: PIPER PA-18-150 - Registry model: [Piper PA-18-150](https://openairdocs.org/model/piper-pa-18-150) (registry code 7101828) (OpenAirDocs) - Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 18-8762 - Airframe hours: 4591 - Engines: LYCOMING 0-320 SERIES 180 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: Lockwood Aviation L P - Registered owner: Lockwood Aviation L P - Airworthiness certificate: Standard, Normal - Last inspection: Annual, April 17, 2009 - Departed: None, Okanogan, WA - Destination: None, Okanogan, WA - Airport: None, Private, runway 36, 3,675 × 50 ft, gravel ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 65; injuries: none; flight instructor, airline transport, commercial; airplane ratings: single-engine sea, single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, with waivers/limitations; last flight review June 23, 2009; seat: front; flight hours: 18,400 total, 1,000 in this make and model, 30 in the last 90 days, 20 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 130° at 6 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 52 °F, dew point 27 °F - Altimeter: 30.37 inHg - Observed at: OMK, 7 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 20100317029399A](https://openairdocs.org/incident/20100317029399A), Mar 17, 2010: Piper PA-18-150, Okanogan, WA, Substantial damage. During a simulated emergency no power approach the pilot landed long, bounced the landing, and elected to go-around. The aircraft main gear caught the airport… ## Other investigations on N4425Z (1) 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. - [NTSB OAK71DVM18](https://openairdocs.org/ntsb/OAK71DVM18), Sep 28, 1970: Piper PA-18 (N4425Z), Bradley, CA, substantial damage ## Docket (1 files) The files NTSB released with the investigation on April 9, 2010, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=75548. 416 KB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 416 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40328201&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. --- 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.