ASN Wikibase Occurrence # 230538
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| Date: | Tuesday 29 May 2018 |
| Time: | 13:45 |
| Type: |  Cessna 337 Super Skymaster |
| Owner/operator: | Private |
| Registration: | N86507 |
| MSN: | 33701212 |
| Year of manufacture: | 1969 |
| Total airframe hrs: | 1925 hours |
| Engine model: | Continental IO-360 SER |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Atlanta, GA -
 United States of America
|
| Phase: | Landing |
| Nature: | Private |
| Departure airport: | Atlanta-DeKalb Peachtree Airport, GA (PDK/KPDK) |
| Atlanta-DeKalb Peachtree Airport, GA (PDK/KPDK) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The private pilot was conducting a cross-country, personal flight. He stated that, while on approach to the destination airport, he was unable to extend the landing gear. He declared an emergency and attempted to pump the landing gear down via the emergency gear-extension handle to no avail. He then observed a large puddle of red hydraulic fluid on the floorboards near the hydraulic pump. The pilot realized that he would not be able to extend the gear and conducted a gear-up landing, which resulted in substantial damage to the lower fuselage.
Postaccident examination of the airplane revealed that the hydraulic reservoir was nearly empty. When the emergency handle was activated, a stream of hydraulic fluid sprayed from the surface of the aluminum hydraulic line connecting the emergency handle/pump to the electric hydraulic pump that was mounted under and behind the pilot’s instrument panel. Magnified visual examination of the leaking hydraulic line revealed an area of corrosion and pitting on the aluminum surface, which likely resulted in a loss of hydraulic pressure and the pilot's inability to extend the landing gear.
Probable Cause: An area of pitting and corrosion on the surface of the aluminum hydraulic line connecting the emergency handle/pump to the electric hydraulic pump, which resulted in a loss of hydraulic pressure and the pilot’s inability to extend the landing gear.
Accident investigation:
 |
|
Sources:
NTSB
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 11-Nov-2019 17:43 | ASN Update Bot | Added |
| 16-Nov-2022 20:21 | Ron Averes | Updated [Aircraft type, Departure airport, Destination airport, Narrative] |
Corrections or additions? ... Edit this accident description
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