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No. of STCs: 4

STC Holder: Heyworth Eugene 10560 Left Wing Ct., Silverdale, WA 98383, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA00958SE	Status: Current	App Date:	Rev Date: 08/22/2001
Description: Manufacture and installation of audio control panel in accordance with wiring diagrams, specifications, and photographs contained within the FAA project file. Data pertaining to this modification are considered inadequate for duplication in other aircraft. This approval for change in type design is limited to Cessna Model 177, Serial Numbers 17700123 and 17700674 only.
TC Nos.: A13CE
Models: The Cessna Aircraft Company177
ACO: AIR-770: West Certification Branch SEA

STC Holder: Heyworth Eugene 10560 Left Wing Ct., Silverdale, WA 98383, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA4359NM	Status: Current	App Date: 05/26/1987	Rev Date: 05/17/1999
Description: Installation of redesigned upper door hinge pin and retainer.
TC Nos.: A13CE, A20CE
Models: Cessna Aircraft Company177, 177A, 177B, 177RG
ACO: AIR-770: West Certification Branch SEA

STC Holder: Heyworth Eugene 10560 Left Wing Ct., Silverdale, WA 98383, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA5696NM	Status: Current	App Date: 04/24/1990	Rev Date: 03/20/1992
Description: Repair of the Cabin Door lower hinge
TC Nos.: A13CE
Models: Cessna Aircraft Company177
ACO: AIR-770: West Certification Branch SEA

STC Holder: Heyworth Eugene 10560 Left Wing Ct., Silverdale, WA 98383, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA5697NM	Status: Current	App Date: 04/24/1990	Rev Date: 08/04/2000
Description: Repair of upper hinge on the cabin door.
TC Nos.: A13CE, A20CE
Models: The Cessna Aircraft Company177, 177A, 177B, 177RG
ACO: AIR-770: West Certification Branch SEA