# NTSB ANC22LA046: Rockwell International 114, N4888W, Kailua-Kona, HI, June 21, 2022 - Type: NTSB accident investigation - Classification: Accident · No injuries · Class 4 · Limited · Final report - Date: June 21, 2022, 08:30 local (18:30 UTC) - Place: Kailua-Kona, HI - Coordinates: 19.735699, -156.0427 - Nearby events: https://openairdocs.org/map.md?lat=19.7357&lon=-156.0427&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-landing roll: Landing gear collapse](https://openairdocs.org/ntsb-events/094) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed - Report: Approved by Office Director - Investigation class: Class 4 - Basic report with no Prelim publish - NTSB office: Alaska Regional Office - Parties: Federal Aviation Administration - NTSB case key (mKey): 105320 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC22LA046 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/105320/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=105320 - Page: https://openairdocs.org/ntsb/ANC22LA046 ## Probable cause The failure of the hydraulic power supply’s electric motor due to wear, which resulted in the left main landing gear and nose gear not fully extending and locking into place during landing. Contributing to the accident was the pilot's failure to adequately execute the emergency gear extension procedure. ## 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 · Fatigue/wear/corrosion (probable cause); cases with it: [Rockwell International 114, 1 case](https://openairdocs.org/ntsb-findings/01023230/cases.md?model=7630314), [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: [Rockwell International 114, 2 cases](https://openairdocs.org/ntsb-findings/02041035/cases.md?model=7630314), [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-landing roll: Landing gear collapse](https://openairdocs.org/ntsb-events/094) (defining event); cases with it: [Rockwell International 114, 2 cases](https://openairdocs.org/ntsb-events/094/sequence.md?model=7630314), [All aircraft, 1,787 cases](https://openairdocs.org/ntsb-events/094/sequence.md) ## Analysis The pilot reported that he was practicing pattern work and landings. After completing one landing, he back taxied, departed and entered the traffic pattern. While in the traffic pattern he lowered the landing gear; however, it did not extend properly. Multiple attempts to recycle the landing gear and manually extend the gear using the emergency extension procedure were not successful. He elected to return to a tower-controlled airport. The tower controller subsequently confirmed that the landing gear was only extended on the right side. The pilot executed an emergency landing which resulted in substantial damage to the left wing. Postaccident examination of the airplane revealed that the emergency gear extension handle was in the up and stowed position, and the emergency gear extension system worked as designed. The landing gear hydraulic power supply contained a reversible electric-motor driven hydraulic pump that was found inoperable. The electric motor was disassembled, and the brushes were found to be worn beyond limits. In addition, hydraulic fluid and dust were present on the permanent magnets, stator, and windings. ## Aircraft - Registration: [N4888W](https://openairdocs.org/deregistered/N4888W-2023-12-02), registration cancelled 2023-12-02, S/N 14218 (OpenAirDocs) - Reported make and model: ROCKWELL INTERNATIONAL 114 - Registry model: [Rockwell International 114](https://openairdocs.org/model/rockwell-international-114) (registry code 7630314) (OpenAirDocs) - Category: Airplane - Serial number: 14218 - Year built: 1977 - Airframe hours: 4586.4 - Engines: Lycoming IO-540 260 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Ellis Jeffrey Mark - Airworthiness certificate: Standard, Normal - Last inspection: 100 hour, March 5, 2021 - Departed: Waimea, HI - Destination: Same as departure - Airport: KOA, Ellison Onizuka Kona Intl At Keahole - Equipment: Stall warning system, Handheld GPS, Auto-pilot, ADS-B ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 67; injuries: none; private; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 3, with waivers/limitations; last flight review November 2, 2021; seat: left; flight hours: 2,200 total, 78 in this make and model, 2,200 as pilot in command, 47 in the last 90 days, 7 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 230° at 7 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 81 °F, dew point 68 °F - Altimeter: 30.03 inHg - Observed at: PHKO - METAR: PHKO 211853Z 23007KT 10SM CLR 27/20 A3003 RMK AO2 SLP167 T02720200 ## 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 20220621010839A](https://openairdocs.org/incident/20220621010839A), Jun 21, 2022: Rockwell International 114, Kona, HI, Substantial damage. 06/21/2022 - The pilot in command (PIC) of a Rockwell commander 114, registration [privacy data omitted], took off from Kona international airport (koa) and… ## Docket (3 files) The files NTSB released with the investigation on November 7, 2022, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=105320. 12.0 MB in all. - Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 7 pages, 8.8 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=14184010&FileExtension=pdf&FileName=CCF_000015_Redacted-Rel.pdf - Wreckage examination summary (item 2, PDF, 2 pages, 213 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=14183893&FileExtension=pdf&FileName=Wreckage%20Examination%20Summary_Redacted-Rel.pdf - Photos (item 3, PDF, 5 pages, 3.0 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=14581000&FileExtension=pdf&FileName=Photo%20Array-Rel.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.