STC Holder: Williams Robert or Barbara

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No. of STCs: 26

STC Holder: Williams Robert or Barbara 213 N. Clark, Udall, KS 67146, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA1004CE	Status: Current	App Date:	Rev Date: 08/28/1985
Description: Install STOL kit.
TC Nos.: 5A6
Models: The Cessna Aircraft Company180, 180A, 180B, 180C, 180D, 180E, 180F, 180G, 180H, 180J, 180K
ACO: AIR-760: Central Certification Branch WI

STC Holder: Williams Robert or Barbara 213 N. Clark, Udall, KS 67146, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA1056SW	Status: Current	App Date:	Rev Date: 04/27/1984
Description: Revise wing contours, leading edge and redesign landing light deflector plates.
TC Nos.: A2CE, A6CE
Models: The Cessna Aircraft Company336, 337, 337A (USAF 02B), 337B, 337C, 337D, 337E, 337F, T337C, T337D, T337E, T337F
ACO: AIR-760: Central Certification Branch WI

STC Holder: Williams Robert or Barbara 213 N. Clark, Udall, KS 67146, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA1100SW	Status: Current	App Date:	Rev Date: 04/27/1984
Description: Increase wing leading edge radius.
TC Nos.: 3A21
Models: The Cessna Aircraft Company210G, 210H, 210J, 210K, T210G, T210H, T210J, T210K
ACO: AIR-760: Central Certification Branch WI

STC Holder: Williams Robert or Barbara 213 N. Clark, Udall, KS 67146, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA1371SW	Status: Current	App Date: 07/16/1971	Rev Date: 04/14/1983
Description: Wing leading cuff, wing tips and upper surface flow fences.
TC Nos.: 3A12, 3A13, 3A14, 3A17, 3A19, 3A21, 3A24, 5A2, 5A5, 5A6, A-799, A13CE, A16CE, A4CE
Models: Cessna Aircraft Company140A, 150, 150A, 150B, 150C, 150D, 150E, 150F, 150G, 150H, 150J, 150K, 150L, 150M, 152, 170, 170A, 170B, 172, 172A, 172B, 172C, 172D, 172E, 172F (USAF T-41A), 172G, 172H (USAF T-41A), 172I, 172K, 172L, 175, 175A, 175B, 175C, 177, 180, 180A, 180B, 180C, 180D, 180E, 180F, 180G, 180H, 182, 182A, 182B, 182C, 182D, 182E, 182F, 182G, 182H, 182J, 182K, 182L, 182M, 182N, 185, 185A, 185B, 185C, 185D, 185E, 206, 207, 210, 210-5 (205), 210-5A (205A), 210A, 210B, 210C, 210D, 210E, 210F, 210G, 210H, 210J, 210K, 210L, 210M, A150K, A150L, A150M, A152, A185E, P206, P206A, P206B, T207, T210F, T210G, T210H, T210J, T210K, T210L, T210M Regal Air Inc.305A, 305B, 305C, 305D, 305E, 305F
ACO: AIR-760: Central Certification Branch WI

STC Holder: Williams Robert or Barbara 213 N. Clark, Udall, KS 67146, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA1446SW	Status: Historical	App Date:	Rev Date: 04/27/1984
Description: Installation of wing leading edge cuff, strut fairings, and vortex generators.
TC Nos.: A9CE
Models: The Cessna Aircraft Company188, A188
ACO: Wichita ACO Branch, Tel: +1 (316) 946-4100

STC Holder: Williams Robert or Barbara 213 N. Clark, Udall, KS 67146, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA1446SW	Status: Current	App Date: 01/24/1972	Rev Date: 04/27/1984
Description: Installation of wing leading edge cuff, strut fairings, and vortex generators.
TC Nos.: A9CE
Models: The Cessna Aircraft Company188, A188
ACO: AIR-760: Central Certification Branch WI

STC Holder: Williams Robert or Barbara 213 N. Clark, Udall, KS 67146, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA1474SW	Status: Current	App Date: 03/22/1972	Rev Date: 09/05/1979
Description: Installation of 'MASA' 1223000-7 and -8 wing tip.
TC Nos.: 3A12, 3A13, 3A17, 3A19, 3A21, 3A24, 5A2, 5A5, 5A6, A-799, A16CE, A4CE
Models: Regal Air Inc.305A, 305C, 305D, 305F Textron Aviation Inc.140A, 150, 150A, 150B, 150C, 150D, 150E, 150F, 150G, 150H, 150J, 150K, 150L, 170A, 170B, 172, 172A, 172B, 172C, 172D, 172E, 172F (USAF T-41A), 172G, 172H (USAF T-41A), 172I, 172K, 172L, 175, 175A, 175B, 175C, 180, 180A, 180B, 180C, 180D, 180E, 180F, 180G, 180H, 182, 182A, 182B, 182C, 182D, 182E, 182F, 182G, 182H, 182J, 182K, 182L, 182M, 182N, 185, 185A, 185B, 185C, 185D, 185E, 206, 207, 210, 210-5 (205), 210-5A (205A), 210A, 210B, 210C, 210D, 210E, 210F, A150K, A150L, A185E, P206, P206A, P206B, P206C, P206D, P206E, T207, T210F, TP206A, TP206B, TP206C, TP206D, TP206E, TU206A, TU206B, TU206C, TU206D, TU206E, U206, U206A, U206B, U206C, U206D, U206E
ACO: AIR-760: Central Certification Branch WI

STC Holder: Williams Robert or Barbara 213 N. Clark, Udall, KS 67146, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA150NW	Status: Historical	App Date:	Rev Date: 09/06/1989
Description: Installation of flap gap seals.
TC Nos.: 3A12, 3A13, 3A17, 3A19, 3A21, 3A24, 5A5, 5A6, A-799
Models: The Cessna Aircraft Company150, 150A, 150B, 150C, 150D, 150E, 150F, 150G, 150H, 150J, 150K, 150L, 150M, 152, 170B, 172, 172A, 172B, 172C, 172D, 172E, 172F (USAF T-41A), 172G, 172H (USAF T-41A), 172I, 172K, 172L, 172M, 172N, 172P, 175, 175A, 175B, 175C, 180, 180A, 180B, 180C, 180D, 180E, 180F, 180G, 180H, 180J, 180K, 182, 182A, 182B, 182C, 182D, 182E, 182F, 182G, 182H, 182J, 182K, 182L, 182M, 182N, 182P, 182Q, 185, 185A, 185B, 185C, 185D, 185E, 210, 210-5 (205), 210-5A (205A), 210A, 210B, 210C, 210D, 305A (USAF 0-1A), 305C (USAF 0-1E), 305D (USAF 0-1G), 305F, A150K, A150L, A150M, A152, A185E, A185F, R172K, R182, TR182
ACO: Wichita ACO Branch, Tel: +1 (316) 946-4100

STC Holder: Williams Robert or Barbara 213 N. Clark, Udall, KS 67146, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA150NW	Status: Current	App Date: 10/24/1974	Rev Date: 03/22/1994
Description: Installation of flap gap seals.
TC Nos.: 3A12, 3A13, 3A17, 3A19, 3A21, 3A24, 5A5, 5A6, A-799
Models: The Cessna Aircraft Company150, 150A, 150B, 150C, 150D, 150E, 150F, 150G, 150H, 150J, 150K, 150L, 150M, 152, 170B, 172, 172A, 172B, 172C, 172D, 172E, 172F (USAF T-41A), 172G, 172H (USAF T-41A), 172I, 172K, 172L, 172M, 172N, 172P, 175, 175A, 175B, 175C, 180, 180A, 180B, 180C, 180D, 180E, 180F, 180G, 180H, 180J, 180K, 182, 182A, 182B, 182C, 182D, 182E, 182F, 182G, 182H, 182J, 182K, 182L, 182M, 182N, 182P, 182Q, 185, 185A, 185B, 185C, 185D, 185E, 210, 210-5 (205), 210-5A (205A), 210A, 210B, 210C, 210D, 305A (USAF 0-1A), 305C (USAF 0-1E), 305D (USAF 0-1G), 305F, A150K, A150L, A150M, A152, A185E, A185F, R172K, R182, TR182
ACO: AIR-760: Central Certification Branch WI

STC Holder: Williams Robert or Barbara 213 N. Clark, Udall, KS 67146, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA217RM	Status: Current	App Date: 03/09/1980	Rev Date: 04/19/1991
Description: Installation of Lycoming O-360-A1A engine (150 hp.), Sensenich76EM8S10-0-56 propeller, revised engine mount and fuel system, dorsal fin, wing leading edge cuffs, wing fences, aileron gap closures and other changes.
TC Nos.: 3A19
Models: Cessna Aircraft Company150K, 150L, 150M, 152, A150K, A150L, A150M, A152
ACO: AIR-760: Central Certification Branch WI

STC Holder: Williams Robert or Barbara 213 N. Clark, Udall, KS 67146, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA221GL	Status: Current	App Date:	Rev Date: 04/13/1982
Description: Installation of wheel replacement type skis, FluiDyne all metal (TSO approved) Model A2000A main skis, FluiDyne Model AT2000A tail ski.
TC Nos.: 3A19
Models: The Cessna Aircraft Company150, 150A, 150B, 150C, 150D, 150E, 150F, 150G, 150H, 150J, 150K, 150L, 150M, 152
ACO: AIR-760: Central Certification Branch WI

STC Holder: Williams Robert or Barbara PO Box 431, Udall, KS 67146, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA256NW	Status: Current	App Date: 11/03/1975	Rev Date: 04/12/1993
Description: Installation of aileron gap seals.
TC Nos.: 3A12, 3A13, 3A17, 3A19, 3A21, 3A24, 5A6, A-799
Models: Cessna Aircraft Company150, 150A, 150B, 150C, 150D, 150E, 150F, 150G, 150H, 150J, 150K, 150L, 150M, 152, 170A, 170B, 172, 172A, 172B, 172C, 172D, 172E, 172F (USAF T-41A), 172G, 172H (USAF T-41A), 172I, 172K, 172L, 172M, 172N, 172P, 172Q, 172RG, 175, 175A, 175B, 175C, 180, 180A, 180B, 180C, 180D, 180E, 180F, 180G, 180H, 180J, 180K, 182, 182A, 182B, 182C, 182D, 182E, 182F, 182G, 182H, 182J, 182K, 182L, 182M, 182N, 182P, 182Q, 182R, 185, 185A, 185B, 185C, 185D, 185E, 210, 210-5 (205), 210-5A (205A), A150K, A150L, A150M, A152, A185E, A185F, P172D, R172K, R182, T182, TR182
ACO: AIR-760: Central Certification Branch WI

STC Holder: Williams Robert or Barbara 213 N. Clark, Udall, KS 67146, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA256NW	Status: Historical	App Date:	Rev Date: 03/07/1986
Description: Installation of aileron gap seals. (R172K XP) (R182 RG) (210 THRU S/N 21058220THRU S/N 21058220)
TC Nos.: 3A12, 3A13, 3A17, 3A19, 3A21, 3A24, 5A6, A-799
Models: The Cessna Aircraft Company150, 150A, 150B, 150C, 150D, 150E, 150F, 150G, 150H, 150J, 150K, 150L, 150M, 152, 170, 170A, 170B, 172, 172A, 172B, 172C, 172D, 172E, 172F (USAF T-41A), 172G, 172H (USAF T-41A), 172I, 172K, 172L, 172M, 172N, 172P, 175, 175A, 175B, 175C, 180, 180A, 180B, 180C, 180D, 180E, 180F, 180G, 180H, 180J, 180K, 182, 182A, 182B, 182C, 182D, 182E, 182F, 182G, 182H, 182J, 182K, 182L, 182M, 182N, 182P, 182Q, 185, 185A, 185B, 185C, 185D, 185E, 210, 210-5 (205), 210-5A (205A), A150K, A150L, A150M, A152, A185E, A185F, P172D, R172K, R182
ACO: Wichita ACO Branch, Tel: +1 (316) 946-4100

STC Holder: Williams Robert or Barbara 213 N. Clark, Udall, KS 67146, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA268GL	Status: Current	App Date:	Rev Date: 04/13/1982
Description: Installation of wheel and ski adapters on Models 150F, G, H, J, K, L, M, 152 aircraft modified per STCSA175GL. Installation of adapter extension-landing gear, landing-gear extended-assembly of Models 150, 150A - H, J - M, A150K - A150M, 152, A152 aircraft modified per STC SA175GL.
TC Nos.: 3A19
Models: The Cessna Aircraft Company150, 150A, 150B, 150C, 150D, 150E, 150F, 150G, 150H, 150J, 150K, 150L, 150M, 152, A150K, A150L, A150M, A152
ACO: AIR-760: Central Certification Branch WI

STC Holder: Williams Robert or Barbara 213 N. Clark, Udall, KS 67146, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA2800CE	Status: Historical	App Date:	Rev Date: 04/08/1992
Description: Gross weight increase to 2550 pounds.
TC Nos.: 3A12
Models: The Cessna Aircraft Company172L, 172M, 172N, 172P
ACO: Wichita ACO Branch, Tel: +1 (316) 946-4100

STC Holder: Williams Robert or Barbara 213 N. Clark, Udall, KS 67146, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA318GL	Status: Current	App Date:	Rev Date: 04/13/1982
Description: Installation of Bolen wheel extenders on Cessna models modified per STC SA175GL and/or SA268GL.
TC Nos.: 3A19
Models: The Cessna Aircraft Company150, 150A, 150B, 150C, 150D, 150E
ACO: AIR-760: Central Certification Branch WI

STC Holder: Williams Robert or Barbara 213 N. Clark, Udall, KS 67146, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA319GL	Status: Current	App Date:	Rev Date: 04/13/1982
Description: Installation of Bolen wheel extenders on Cessna models modified per STCSA296GL.
TC Nos.: 3A12
Models: The Cessna Aircraft Company172D, 172E, 172F (USAF T-41A), 172G, 172H (USAF T-41A), 172I, 172K
ACO: AIR-760: Central Certification Branch WI

STC Holder: Williams Robert or Barbara Box 608, Udall, KS 67146, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA383GL	Status: Current	App Date: 01/08/1980	Rev Date: 04/13/1982
Description: Convert to conventional landing gear.
TC Nos.: 3A17
Models: Cessna Aircraft Company175, 175A, 175B, 175C, R172K
ACO: AIR-760: Central Certification Branch WI

STC Holder: Williams Robert or Barbara 213 N. Clark, Udall, KS 67146, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA419CE	Status: Current	App Date:	Rev Date: 01/28/1983
Description: Installation of engines, propellers, and dorsal fin, and increase takeoff weight.
TC Nos.: 1A10
Models: The New Piper Aircraft Inc.PA-23, PA-23-160
ACO: AIR-760: Central Certification Branch WI

STC Holder: Williams Robert or Barbara 213 N. Clark, Udall, KS 67146, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA420CE	Status: Historical	App Date: 01/28/1966	Rev Date: 07/01/1975
Description: Installation of O-360-() series engines, fixed pitch and constant speed propellers. (172D, 172E, 172F (USAFT-41A), 172G, 172H (USAFT-41A FLOATPLANES (EDO89-2000 FLOATS ONLY) (172A, 172B, 172C LANDPLANES)
TC Nos.: 3A12
Models: The Cessna Aircraft Company172, 172A, 172B, 172C, 172D, 172E, 172F (USAF T-41A), 172G, 172H (USAF T-41A)
ACO: Wichita ACO Branch, Tel: +1 (316) 946-4100

STC Holder: Williams Robert or Barbara 213 N. Clark, Udall, KS 67146, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA471CE	Status: Current	App Date:	Rev Date: 01/28/1983
Description: Installation of dorsal fin.
TC Nos.: 1A10
Models: The New Piper Aircraft Inc.PA-23, PA-23-160
ACO: AIR-760: Central Certification Branch WI

STC Holder: Williams Robert or Barbara 213 N. Clark, Udall, KS 67146, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA508GL	Status: Current	App Date:	Rev Date: 04/13/1982
Description: Installation of FluiDyne A2500A or AT2500A skis.
TC Nos.: 3A17
Models: The Cessna Aircraft Company175, 175A, 175B, 175C, R172K
ACO: AIR-760: Central Certification Branch WI

STC Holder: Williams Robert or Barbara 213 N. Clark, Udall, KS 67146, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA572CE	Status: Current	App Date: 03/22/1968	Rev Date: 12/20/2001
Description: Installation of Lycoming 150 or 160 hp Model O-320 engine.
TC Nos.: 3A19
Models: The Cessna Aircraft Company150, 150A, 150B, 150C, 150D, 150E, 150F, 150G, 150H, 150J, 150K, 150L, 150M, A150K, A150L, A150M
ACO: AIR-760: Central Certification Branch WI

STC Holder: Williams Robert or Barbara 213 N. Clark, Udall, KS 67146, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA750CE	Status: Current	App Date: 03/10/1971	Rev Date: 10/19/1987
Description: Installation of Lycoming 150 and160 hp Model O-320-( ) engine. (150, 150A, 150C, 150D, 150E, 150F, 150K, 150J, A150K, 150L, A150L, 150B, 150M, 150H, 150G LANDPLANES)
TC Nos.: 3A19
Models: The Cessna Aircraft Company150, 150A, 150B, 150C, 150D, 150E, 150F, 150G, 150H, 150J, 150K, 150L, 150M, A150K, A150L
ACO: AIR-760: Central Certification Branch WI

STC Holder: Williams Robert or Barbara Box 654, Udall, KS 67146, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA793CE	Status: Current	App Date: 06/07/1971	Rev Date: 12/13/1988
Description: Install Lycoming O-360-( ) engine and Hartzell HC-C2YK-1B/7666A-2 or Sensenich 76EM8S5 or McCauley 1A170EFA propeller.
TC Nos.: 2A13
Models: Piper Aircraft Inc.PA-28-140, PA-28-150, PA-28-151, PA-28-160, PA-28-161
ACO: AIR-760: Central Certification Branch WI

STC Holder: Williams Robert or Barbara Box 654, Udall, KS 67146, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA806CE	Status: Current	App Date: 10/19/1971	Rev Date: 12/15/1993
Description: Installation of Lycoming engine model O-360-( ) and propellers.
TC Nos.: A-799
Models: Cessna Aircraft Company170A, 170B
ACO: AIR-760: Central Certification Branch WI

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STC Holder: Williams Robert or Barbara