# NTSB ANC20CA045: Grumman G44, N91040, Anchorage, AK, May 1, 2020 - Type: NTSB accident investigation - Classification: Accident · No injuries · Class 4 · Data collection · Final report - Date: April 30, 2020, 17:15 local (May 1, 2020, 01:15 UTC) - Place: Anchorage, AK - Coordinates: 61.215831, -149.84194 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=61.2158&lon=-149.8419&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-flare/touchdown: Landing gear not configured](https://openairdocs.org/ntsb-events/095) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed - Report: Approved by Office Director - Investigation class: Class 4 - Basic report with no Prelim publish - NTSB office: Alaska Regional Office - Parties: FAA - NTSB case key (mKey): 101246 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC20CA045 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/101246/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=101246 - Page: https://openairdocs.org/ntsb/ANC20CA045 ## Probable cause The pilot's failure to extend the landing gear for a runway landing, which resulted in a gear-up landing. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Landing gear system: gear extension and retract sys](https://openairdocs.org/ntsb-findings/01023230): Aircraft › Aircraft systems · Not used/operated (probable cause); cases with it: [Grumman G-44, 1 case](https://openairdocs.org/ntsb-findings/01023230/cases.md?model=3951502), [All aircraft, 416 cases](https://openairdocs.org/ntsb-findings/01023230/cases.md) - [Action: forgotten action/omission](https://openairdocs.org/ntsb-findings/02041035): Personnel issues › Action/decision · Pilot (probable cause); cases with it: [Grumman G-44, 1 case](https://openairdocs.org/ntsb-findings/02041035/cases.md?model=3951502), [All aircraft, 440 cases](https://openairdocs.org/ntsb-findings/02041035/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Landing-flare/touchdown: Landing gear not configured](https://openairdocs.org/ntsb-events/095) (defining event); cases with it: [Grumman G-44, 1 case](https://openairdocs.org/ntsb-events/095/sequence.md?model=3951502), [All aircraft, 584 cases](https://openairdocs.org/ntsb-events/095/sequence.md) ## Analysis The pilot reported that he failed to extend the landing gear on the amphibious airplane for a landing to an asphalt runway. Subsequently, the airplane landed with the landing gear in the retracted position, which resulted in substantial damage to the fuselage. 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 reported that he failed to extend the landing gear on the amphibious airplane for a landing to an asphalt runway. Subsequently, the airplane landed with the landing gear in the retracted position, which resulted in substantial damage to the fuselage. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. ## Aircraft - Registration: [N91040](https://openairdocs.org/aircraft/N91040), registered now, S/N 1267, built 1942 (OpenAirDocs) - Reported make and model: GRUMMAN G44 - Registry model: [Grumman G-44](https://openairdocs.org/model/grumman-g-44) (registry code 3951502) (OpenAirDocs) - Registry engine: [Continental I0-470 series](https://openairdocs.org/engine/continental-i0-470-series) (registry code 17027, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 1267 - Year built: 1942 - Airframe hours: 10946 - Engines: Continental IO-470D 260 horsepower reciprocating; Continental IO-470D 260 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Standard, Normal - Last inspection: Annual, December 27, 2019 - Departed: IYS, Wasilla, AK - Destination: MRI, Anchorage, AK - Flight plan: Company VFR - Airport: MRI, Merrill Field, runway 25, 4,000 × 100 ft, asphalt - Equipment: ADS-B, Electronic flight bag or handheld device, Satellite tracking device ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 53; injuries: none; commercial, airline transport; airplane ratings: single-engine sea, multi-engine sea, single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, with waivers/limitations; last flight review October 11, 2019; seat: left; restraint: 3-point; flight hours: 16,028 total, 228 in this make and model, 15,768 as pilot in command, 57 in the last 90 days, 48 in the last 30 days, 2 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 180° at 8 knots - Visibility: 8 statute miles - Lowest ceiling: 5,500 ft broken - Temperature: 50 °F, dew point 30 °F - Altimeter: 29.63 inHg - Observed at: PAMR ## 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 20200430007059A](https://openairdocs.org/incident/20200430007059A), Apr 30, 2020: Grumman G-44, Anchorage, AK, Substantial damage. Received a call from the operator, natron air, 04/30/2020 at 17:49PM. I contacted my frontline manager in juneau, Alaska. Reporting that natron had a gear up… ## Other investigations on N91040 (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 ANC73AA007](https://openairdocs.org/ntsb/ANC73AA007), Jul 22, 1972: Grumman G-44 (N91040), Kodiak, AK, substantial damage ## Docket (1 files) The files NTSB released with the investigation on August 5, 2020, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=101246. 423 KB in all. - Accident Picture (item 1, .PDF, 423 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40485898&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.