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ASN Wikibase Occurrence # 133526
Last updated: 2 December 2021
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Date:13-JUN-1997
Time:11:40
Type:Silhouette image of generic SS2T model; specific model in this crash may look slightly different
Ayres S-2R-G10 Turbo Thrush
Owner/operator:C & C Flying Service Inc.
Registration: N6133X
MSN: G10-121
Fatalities:Fatalities: 0 / Occupants: 1
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Category:Accident
Location:Biggers, AR -   United States of America
Phase: Take off
Nature:Agricultural
Departure airport:
Destination airport:
Investigating agency: NTSB
Narrative:
On June 13, 1997, at 1140 central daylight time, an Ayres S2R-G10 agricultural airplane, N6133X, was destroyed when it impacted trees during a forced landing following a loss of engine power near Biggers, Arkansas. The commercial pilot, sole occupant of the airplane, was not injured. The airplane was registered to and operated by C & C Flying Service of Pocahontas, Arkansas. A flight plan was not filed, and visual meteorological conditions prevailed for the Title 14 CFR Part 137 local aerial application flight which was originating when the accident occurred.

During a personal interview conducted by the NTSB investigator-in-charge and in a written statement, the pilot reported that the engine "quit" as he completed rolling out of a left turn after takeoff from the private airstrip. He executed an "emergency landing in a small corn field;" however, the "field was not big enough," and during the landing roll, the airplane collided with trees at the edge of the field. Both wings separated from the fuselage, and the fuselage and tail section sustained structural damage.

On July 10, 1997, the engine, a Garrett TPE331-10-511K, S/N P-38032C, was disassembled at the facilities of Allied Signal in Phoenix, Arizona, under the supervision of a FAA inspector. According to the FAA inspector, no discrepancies were found that would have contributed to the power loss.

On August 19, 1997, the airframe was examined at Arkansas Airframe in Clinton, Arkansas, under the supervision of the NTSB investigator-in-charge. The fuel line leading from the forward left wing tank outlet fitting to the fuselage header tank was found completely blocked by a foreign object. Approximately 80 psi of air pressure was required to dislodge the object from the line. The object was irregularly shaped, measured about 1 inch by 1/2 inch by 1/2 inch, and appeared to be composed of black silicone rubber. Several other similar objects were found in the fuselage header tank.

Both the left and right wing tanks were inspected by removing tank access panels, and no foreign objects were found in either tank. Visual examination of the inner surface of each tank revealed no evidence that black silicone rubber had been used as a tank sealant or as gasket material during manufacture of the airplane. The lack of chipped paint on the tank access panels and the presence of paint on the heads of the screws holding the access panels in place suggested that the panels had not been removed subsequent to the factory paint being applied.

Review of the maintenance records by the NTSB investigator-in-charge indicated that the airplane's date of manufacture was February 1996. The most recent annual inspection was completed on February 20, 1997, at an airframe total time of 390.3 hours. According to the hour meter in the airplane, the airframe had accumulated 695.7 hours at the time of the accident. No mention was made in the records of any maintenance, repairs or modifications to the fuel system.

The object which was found blocking the fuel line was forwarded to Chemier/Polytech Laboratories, Inc., of Maryland Heights, Missouri, for chemical analysis. In their report dated September 23, 1997, Chemir/Polytech stated that the object "appears to be composed primarily of a poly(dimethylsiloxane) material, chemically similar to materials which are typically referred to as silicone rubber."

The Safety Board has investigated one other mishap in which silicone rubber was found blocking fuel lines of an Ayres S2R-G10. For details of this incident, refer to NTSB Factual Report FTW97IA362, Munday, Texas, May 8, 1997, Ayres S2R-G10, N3298Y.

In October 1997, in response to the findings of this accident investigation and the investigation into the May 8, 1997, incident, personnel from the FAA's Aircraft Certification Office in Atlanta, Georgia, and the Manufacturing Inspection Satellite Office in Mobile, Alabama, inspected the production line at the Ayres Corporation's factory in Albany, Georgia. No evidence was found that

Sources:

NTSB id 20001208X08121


Revision history:

Date/timeContributorUpdates
21-Dec-2016 19:26 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]

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