ASN Wikibase Occurrence # 279483
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| Date: | Tuesday 21 June 2022 |
| Time: | 08:30 LT |
| Type: |  Rockwell Commander 114 |
| Owner/operator: | Ellis Jeffrey Mark |
| Registration: | N4888W |
| MSN: | 14218 |
| Year of manufacture: | 1977 |
| Total airframe hrs: | 4586 hours |
| Engine model: | Lycoming IO-540 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Ellison Onizuka Kona Airport, Hawaii, HI -
 United States of America
|
| Phase: | Landing |
| Nature: | Private |
| Departure airport: | Waimea, HI |
| Kailua-Kona, HI | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
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.
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.
Accident investigation:
 |
|
Sources:
NTSB ANC22LA046
FAA register: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=4888W
https://flightaware.com/live/flight/N4888W/history/20220621/1800Z/PHKO/PHKO
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 22-Jun-2022 04:02 | Geno | Added |
| 22-Jun-2022 09:06 | RobertMB | Updated [Registration, Nature, Source, Damage, Narrative] |
| 22-Jun-2022 09:12 | RobertMB | Updated [Source] |
| 24-Jun-2022 15:53 | Captain Adam | Updated [Source, Damage, Narrative] |
| 24-Jun-2022 16:57 | RobertMB | Updated [Source, Damage, Narrative] |
| 30-Jun-2022 02:55 | Captain Adam | Updated [Damage, Narrative] |
| 20-Jul-2022 01:07 | Captain Adam | Updated [Time, Departure airport, Source, Narrative, Category] |
| 10-Jun-2023 10:13 | Ron Averes | Updated [[Time, Departure airport, Source, Narrative, Category]] |
Corrections or additions? ... Edit this accident description
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