# NTSB GAA19CA507: Maule M5, N9096E, Anchorage, AK, August 22, 2019 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: August 22, 2019, 10:45 local (18:45 UTC) - Place: Anchorage, AK - Coordinates: 61.493331, -151.906387 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=61.4933&lon=-151.9064&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing: Loss of control on ground](https://openairdocs.org/ntsb-events/230) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report February 11, 2020 - Report: Approved by Office Director - NTSB office: General Aviation Accidents - Parties: FAA - NTSB case key (mKey): 100130 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=GAA19CA507 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/100130/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=100130 - Page: https://openairdocs.org/ntsb/GAA19CA507 ## Probable cause The pilot's excessive braking during landing on a dry lakebed, which resulted in a nose-over. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Use of equip/info: use of equip/system](https://openairdocs.org/ntsb-findings/02063015): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Maule M-5-235C, 4 cases](https://openairdocs.org/ntsb-findings/02063015/cases.md?model=5460135), [All aircraft, 1,391 cases](https://openairdocs.org/ntsb-findings/02063015/cases.md) - [Landing gear system: brake](https://openairdocs.org/ntsb-findings/01023242): Aircraft › Aircraft systems · Incorrect use/operation (probable cause); cases with it: [Maule M-5-235C, 2 cases](https://openairdocs.org/ntsb-findings/01023242/cases.md?model=5460135), [All aircraft, 297 cases](https://openairdocs.org/ntsb-findings/01023242/cases.md) - [Runway/land/takeoff/taxi surface: soft surface](https://openairdocs.org/ntsb-findings/03023020): Environmental issues › Physical environment · Effect on operation (probable cause); cases with it: [Maule M-5-235C, 3 cases](https://openairdocs.org/ntsb-findings/03023020/cases.md?model=5460135), [All aircraft, 264 cases](https://openairdocs.org/ntsb-findings/03023020/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: [Maule M-5-235C, 2 cases](https://openairdocs.org/ntsb-events/900/sequence.md?model=5460135), [All aircraft, 1,556 cases](https://openairdocs.org/ntsb-events/900/sequence.md) - [Landing: Abnormal runway contact](https://openairdocs.org/ntsb-events/090); cases with it: [Maule M-5-235C, 3 cases](https://openairdocs.org/ntsb-events/090/sequence.md?model=5460135), [All aircraft, 1,506 cases](https://openairdocs.org/ntsb-events/090/sequence.md) - [Landing: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [Maule M-5-235C, 8 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=5460135), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) - [Landing: Attempted remediation/recovery](https://openairdocs.org/ntsb-events/060); cases with it: [Maule M-5-235C, 3 cases](https://openairdocs.org/ntsb-events/060/sequence.md?model=5460135), [All aircraft, 1,422 cases](https://openairdocs.org/ntsb-events/060/sequence.md) - [Landing-landing roll: Nose over/nose down](https://openairdocs.org/ntsb-events/096); cases with it: [Maule M-5-235C, 18 cases](https://openairdocs.org/ntsb-events/096/sequence.md?model=5460135), [All aircraft, 2,287 cases](https://openairdocs.org/ntsb-events/096/sequence.md) ## Analysis The pilot of the tailwheel-equipped airplane reported that, after a three-point landing on a dry lakebed, the main landing gear "hit an unseen undulation in the landing pathway," and the airplane bounced. As the main landing gear touched down again, the pilot applied heavy braking, and the airplane nosed over. The airplane sustained substantial damage to the engine mount, right wing, and 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 tailwheel-equipped airplane reported that, after a three-point landing on a dry lakebed, the main landing gear "hit an unseen undulation in the landing pathway" and the airplane bounced. As the main landing gear touched down again, the pilot applied heavy braking and the airplane nosed over. The airplane sustained substantial damage to the engine mount, right wing and 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: [N9096E](https://openairdocs.org/aircraft/N9096E), registered now, S/N 7095C, built 1977 (OpenAirDocs) - Reported make and model: Maule M5 (235C) - Registry model: [Maule M-5-235C](https://openairdocs.org/model/maule-m-5-235c) (registry code 5460135) (OpenAirDocs) - Registry engine: [Lycoming 0-540 series](https://openairdocs.org/engine/lycoming-0-540-series) (registry code 41532, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 7095C - Year built: 1977 - Airframe hours: 1076.7 - Engines: Lycoming O-540 235 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Standard, Normal - Last inspection: Annual, August 31, 2018 - Departed: PAMR, Anchorage, AK - Destination: Anchorage, AK - Equipment: Electronic flight bag or handheld device ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 45; injuries: none; flight instructor, commercial, airline transport; airplane ratings: multi-engine land, single-engine land, single-engine sea; instrument ratings: airplane, helicopter; medical: class 1, without waivers/limitations; last flight review August 12, 2019; seat: right; restraint: 3-point; flight hours: 10,900 total, 230 in this make and model, 10,000 as pilot in command, 30 in the last 90 days, 15 in the last 30 days, 3 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 330° at 6 knots - Visibility: 8 statute miles - Lowest ceiling: 20,000 ft broken - Temperature: 61 °F, dew point 43 °F - Altimeter: 29.65 inHg - Observed at: PANC, 58 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 20190822022999A](https://openairdocs.org/incident/20190822022999A), Aug 22, 2019: Maule M-5-235C, Beluga Lake, AK, Substantial damage. Pilot landed on dry lake bed with fine, sandy surface. On rollout, aircraft hit small bump or rut, forcing main gear into the air. Tail then hit bump, pushing… ## Docket (2 files) The files NTSB released with the investigation on October 24, 2019, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=100130. 991 KB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 834 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40477072&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Master.PDF - Accident Photo (item 2, .PDF, 1 photo, 157 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40477073&FileExtension=.PDF&FileName=Accident%20Photo-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.