ASN Wikibase Occurrence # 201156
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| Date: | Friday 10 November 2017 |
| Time: | 11:20 |
| Type: |  Temco GC-1B Swift |
| Owner/operator: | Private |
| Registration: | N2363B |
| MSN: | 3663 |
| Year of manufacture: | 1948 |
| Total airframe hrs: | 1526 hours |
| Engine model: | Lycoming IO-360-A1A |
| Fatalities: | Fatalities: 1 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Rapides Parish, near Buhlow Lake, LA -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Private |
| Departure airport: | Shepherd, TX (XS99) |
| Pineville, LA (2L0) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The airline transport pilot departed on a cross-country flight to relocate his newly-purchased airplane to his home state. A fixed-based operator employee at the airport reported that the pilot overflew the airport and requested verification that his landing gear were extended. The employee confirmed that they were down. After overflying the runway the airplane descended and impacted trees and terrain.
Another witness reported that after the low pass, the airplane started to climb and then turned right at an altitude of 250 to 300 ft above ground level. He added that as the airplane turned, its tail "wobbled," which he attributed to a loss of engine power. Then the nose pitched down before it descended below the tree line. The airplane separated into several pieces, and the forward fuselage and engine came to rest inverted behind the empennage.
The signatures on the propeller were consistent with little or no power at the time of the accident. A postaccident examination of the engine, airframe, and flight controls revealed no preimpact anomalies that would have precluded normal operations. Investigators were not able to ascertain why the pilot asked for verification of the landing gear position. The landing gear were found retracted in the airplane wreckage.
The airplane had been equipped with an aftermarket auxiliary fuel tank system; however, the system installed did not match the specifications of the supplemental type certificate (STC) identified in the maintenance logbooks or any other STC approved for the make and model of the airplane. The system had been installed about 9 years before the accident and before the pilot had purchased the airplane. The airplane had only flown about 4.5 hours since the fuel tanks were installed.
The auxiliary fuel tanks were not vented properly which could have resulted in a vacuum preventing fuel flow through the lines and to the engine. In addition, neither auxiliary fuel tank was equipped with a fuel pickup line inside of the tank. During a turn into the selected fuel tank it is possible that the fuel could unport resulting in fuel starvation and a loss of engine power.
The fuel selector valve was selected to the main tank which was empty; however, it is unknown what position change the pilot may have made following the loss of engine power. Evidence of fuel was found in the fuel lines and fuel pump following the accident. Although the amount of fuel onboard the airplane could not be determined, this evidence indicates there was likely sufficient fuel and that fuel exhaustion did not occur.
Given the configuration of the auxiliary fuel tanks, the engine likely lost power due to fuel starvation. This resulted from the unporting of the fuel due to the auxiliary fuel tank's improper configuration and occurred during the right turn the airplane entered after the low pass over the airport.
Probable Cause: The loss of engine power due to fuel starvation, which resulted from the unporting of the fuel during a right turn due to the auxiliary fuel tanks' improper configuration.
Accident investigation:
 |
|
Sources:
NTSB
FAA register: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=N2363B
Location
Media:
Plane crashes near Buhlow Lake, Louisiana, USA. One dead. https://t.co/Y7HKsYAmHh pic.twitter.com/EXMy2TEacd
— Planes Of Legend (@PlanesOfLegend) 11 novembre 2017
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 11-Nov-2017 02:09 | Geno | Added |
| 11-Nov-2017 09:28 | Iceman 29 | Updated [Time, Source, Embed code] |
| 13-Nov-2017 18:27 | Geno | Updated [Aircraft type, Registration, Cn, Operator, Source, Embed code] |
| 15-Jul-2019 18:06 | ASN Update Bot | Updated [Time, Operator, Nature, Departure airport, Destination airport, Source, Damage, Narrative, Accident report, ] |
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