# NTSB GAA18CA385: Piper PA18, N4714Y, Anchorage, AK, June 28, 2018 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: June 28, 2018, 07:15 local (15:15 UTC) - Place: Anchorage, AK - Coordinates: 61.500278, -150.567779 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=61.5003&lon=-150.5678&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing: Nose over/nose down](https://openairdocs.org/ntsb-events/096) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report March 18, 2019 - Report: Approved by Office Director - NTSB office: General Aviation Accidents - Parties: FAA - NTSB case key (mKey): 97633 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=GAA18CA385 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/97633/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=97633 - Page: https://openairdocs.org/ntsb/GAA18CA385 ## Probable cause The pilot’s overapplication of the brakes during landing, which resulted in a nose-over. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Landing gear system: brake](https://openairdocs.org/ntsb-findings/01023242): Aircraft › Aircraft systems · Incorrect use/operation (probable cause); cases with it: [Piper PA-18-150, 10 cases](https://openairdocs.org/ntsb-findings/01023242/cases.md?model=7101828), [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: [Piper PA-18-150, 160 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=7101828), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md) - [Use of equip/info: use of equip/system](https://openairdocs.org/ntsb-findings/02063015): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Piper PA-18-150, 20 cases](https://openairdocs.org/ntsb-findings/02063015/cases.md?model=7101828), [All aircraft, 1,391 cases](https://openairdocs.org/ntsb-findings/02063015/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Landing: Miscellaneous/other](https://openairdocs.org/ntsb-events/900); cases with it: [Piper PA-18-150, 10 cases](https://openairdocs.org/ntsb-events/900/sequence.md?model=7101828), [All aircraft, 1,556 cases](https://openairdocs.org/ntsb-events/900/sequence.md) - [Landing: Nose over/nose down](https://openairdocs.org/ntsb-events/096) (defining event); cases with it: [Piper PA-18-150, 83 cases](https://openairdocs.org/ntsb-events/096/sequence.md?model=7101828), [All aircraft, 2,287 cases](https://openairdocs.org/ntsb-events/096/sequence.md) - [Landing: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Piper PA-18-150, 115 cases](https://openairdocs.org/ntsb-events/470/sequence.md?model=7101828), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) ## Analysis The pilot of the tundra-tire, tailwheel-equipped airplane reported that, while landing off airport on a gravel bar, he "got on the brakes a little too hard and the tail came up and the airplane flipped over." The airplane sustained substantial damage to the left wing lift strut. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. ## Factual narrative The pilot of the tundra tire, tailwheel-equipped airplane reported that, while landing off airport on a gravel bar, he "got on the brakes a little too hard and the tail came up and the airplane flipped over". The airplane sustained substantial damage to the left wing lift strut. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. ## Aircraft - Registration: [N4714Y](https://openairdocs.org/aircraft/N4714Y), registered now, S/N 18-8956 (OpenAirDocs) - Reported make and model: Piper PA18 (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: 18-8956 - Year built: 1971 - Airframe hours: 2162.68 - Engines: Lycoming O-320 SERIES 160 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Standard, Normal - Last inspection: Annual, February 23, 2018 - Departed: AK12, Anchorage, AK - Destination: Anchorage, AK - Equipment: Handheld GPS, Satellite tracking device ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 37; injuries: none; private; airplane ratings: single-engine land; medical: class 2, without waivers/limitations; last flight review July 10, 2016; seat: front; restraint: 4-point; flight hours: 324 total, 221 in this make and model, 263 as pilot in command, 27 in the last 90 days, 12 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: 60° at 4 knots - Visibility: 10 statute miles - Lowest ceiling: 8,000 ft overcast - Temperature: 54 °F, dew point 43 °F - Altimeter: 29.82 inHg - Observed at: PAUO, 21 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 20180628024109A](https://openairdocs.org/incident/20180628024109A), Jun 28, 2018: Piper PA-18-150, Anchorage, AK, Substantial damage. On 06/28/2018, at 0645 the pilot took off from (AK12) flying crown airport Anchorage, AK. He flew over to the susitna river just north of bell island. While… ## Other investigations on N4714Y (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 ANC92LA133](https://openairdocs.org/ntsb/ANC92LA133), Aug 18, 1992: Piper PA-18-150 (N4714Y), Mackey Lake, AK, substantial damage. Probable cause: A LOSS OF POWER FOR UNDETERMINED REASONS. A FACTOR WHICH CONTRIBUTED TO THE SEVERITY OF THE ACCIDENT WAS THE PILOT INADVERTENTLY STALLED THE AIRPLANE. ## Docket (2 files) The files NTSB released with the investigation on October 4, 2018, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=97633. 991 KB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 819 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40467235&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Master.PDF - Accident Picture (item 2, .PDF, 1 photo, 172 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40467236&FileExtension=.PDF&FileName=Accident%20Picture-Master.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.