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No. of STCs: 3

STC Holder: Excalibur 421 LLC 335 Santa Bella, Paso Robles, CA 93446, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA1361SO	Status: Historical	App Date: 04/30/1980	Rev Date: 07/19/2012
Description: Replaces original reciprocating engines with Pratt & Whitney of Canada PT6A-135 or PT6A-112 turbopropeller engines and related changes.
TC Nos.: A7CE
Models: Cessna Aircraft Company421C
ACO: Los Angeles ACO Branch, Tel: +1 (562) 627-5200

STC Holder: Excalibur 421 LLC 335 Santa Bella, Paso Robles, CA 93446, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA1807NM	Status: Historical	App Date: 12/31/1981	Rev Date: 02/13/2013
Description: Installation of two 68.5 U. S. Gallon usable fuel nacelle tanks and fuel system
TC Nos.: A7CE
Models: Cessna Aircraft Company421
ACO: Los Angeles ACO Branch, Tel: +1 (562) 627-5200

STC Holder: Excalibur 421 LLC 4550 South El Pomar Road, Templeton, CA 93465, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA1807NM	Status: Current	App Date: 12/31/1981	Rev Date: 04/13/2017
Description: Installation of two 68.5 U. S. Gallon usable fuel nacelle tanks and fuel system
TC Nos.: A7CE
Models: Cessna Aircraft Company421
ACO: AIR-770: West Certification Branch LA