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No. of STCs: 3

STC Holder: Supreme Aircraft Service Box 82, Elmhurst, IL 60126, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA3-20	Status: Current	App Date:	Rev Date: 01/01/1960
Description: Warren McArthur seats 297 and and 297D (new designation297-ST) modified.
TC Nos.: A-757
Models: Raytheon Aircraft CompanyC18 Series
ACO: AIR-760: Central Certification Branch CHI

STC Holder: Supreme Aircraft Service Box 82, Elmhurst, IL 60126, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA3-21	Status: Current	App Date:	Rev Date: 01/01/1960
Description: Hardman 1200N seats (new designation 1200N-ST1) modified.
TC Nos.: A-757
Models: Raytheon Aircraft CompanyC18 Series
ACO: AIR-760: Central Certification Branch CHI

STC Holder: Supreme Aircraft Service Joliet Municipal Airport, Joliet, IL 60431, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA3-69	Status: Current	App Date: 06/27/1957	Rev Date: 07/25/1957
Description: Remove all deteriorated fabric from the upper surfaces of the wings except for 10" spanwise along the leading edge and 2" spanwise along the trailing edge. 1Apply fabric over the upper surface of the wings, as shown in the sketck on attaohed Form 337. PK screws are used to fasten the tabric to the ribs as on the original installation
TC Nos.: 1A6
Models: Piper Aircraft Inc.PA-22-108
ACO: AIR-760: Central Certification Branch CHI