# STC SA2598NM - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Western Skyways Aircraft Modifications Inc., United States - Description: Installation of an air to air intercooler in the engine induction system downstream of the turbocharger. (See specific serial numbers) H S/N T210-308 THRU T210-0392) - Applied: October 1, 1984 - Status date: September 18, 2026 - Product: Aircraft, Small Airplane - Data sheets: [TCDS 3A21](https://openairdocs.org/tcds/3A21) - Certificate PDF: https://openairdocs.org/files/sha256/1f/83/1f83826d4634e4fd8836e57fafcd39cd18abfabc7ff3f6bc33d3a3aef37ebc56 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID158750068220261023144738.0001 - DRS record last changed: October 23, 2026 - Page: https://openairdocs.org/stc/SA2598NM ## ADs that name it (0) None. ## Approved models (7) - Textron Aviation Inc. T210G ([TCDS 3A21](https://openairdocs.org/tcds/3A21)) - Textron Aviation Inc. T210H ([TCDS 3A21](https://openairdocs.org/tcds/3A21)) - Textron Aviation Inc. T210J ([TCDS 3A21](https://openairdocs.org/tcds/3A21)) - Textron Aviation Inc. T210K ([TCDS 3A21](https://openairdocs.org/tcds/3A21)) - Textron Aviation Inc. T210L ([TCDS 3A21](https://openairdocs.org/tcds/3A21)) - Textron Aviation Inc. T210M ([TCDS 3A21](https://openairdocs.org/tcds/3A21)) - Textron Aviation Inc. T210N ([TCDS 3A21](https://openairdocs.org/tcds/3A21)) ## What the certificate says Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record. SA2598NM Western Skyways Aircraft Modifications Inc. 58784 Spring Creek Road Montrose, CO 81403 Part 3 the Civil Air Regulations. Effective May 15, 1956 3A21 See Page 3 of this STC 1. The approval of this change in type design is restricted to the Textron (Cessna) T210 series aircraft equipped with factory-installed turbochargers that are otherwise unmodified. 2. If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission. (Continued on page 4) 10/1/1984 6/20/1996 9/6/1996 5/28/2002 9/30/1985 10/17/1985 12/19/1985 3/6/1986 ✔ for Jason S. Deutschman Acting Manager, Central Certification Branch Compliance & Airworthiness Division Aircraft Certification Service 4 See page 3 and 4 of this Supplemental Type Certificate (STC) for the description of type design change. See Page 3 of this STC SA2598NM 09/18/26 4 SA2598NM 09/18/26 Date Reissued (continued): 08/27/2002; 05/20/2019; 03/08/2023; 09/18/2026 Date Amended (continued): 10/08/1987 Aircraft eligible for this STC: Make: Textron Aviation Inc. Model: T210G S/N T210-0198 through T210-0307 T210H S/N T210-308 through T210-0392 T210J S/N 21058140; T210-0393 through T210-0454 T210K S/N 21059200 through 21059502 T210L S/N 21059503 through 21061573 T210M S/N 21061574 through 21062953 T210N S/N 21062954 through 21064897 Description of Type Design Change : Installation of an air to air intercooler in the engine induction system downstream of the turbocharger per aircraft portion of Riley International Master Drawing List R-15801, Revision "C", for T210N, dated September 25, 1985; Revision "D" for the T210M, dated October 11, 1985; Revision "F" for the T210K and T210L, dated December 13, 1985; Revision "H" for the T210J dated February 2, 1986; and Revision "K" for the T210G and T210H, dated August 20, 1987; or later FAA approved revisions. STC SE2599NM is required as part of this installation. For T210N, S/N 21062954 through 21064897, Riley International Corporation Pilots Operating Handbook and FAA Approved Airplane Flight Manual Supplement (AFM) No. 1 to Textron Aviation (Cessna) Model T210N Airplane POH-AFM, dated September 30, 1985, or later FAA approved revisions is required. For T210M, S/N 21061574 through 21062953, Riley International Corporation Supplemental AFM No. 1, dated October 17, 1985, or later FAA approved revisions is required. (continued on page 4) 3 4 Add Page SA2598NM 09/18/26 Description of Type Design Change (continued): For T210L, S/N 21059503 through 21051573, Riley International Corporation Supplemental AFM No. 1, dated December 19, 1985, or later FAA approved revisions is required. For T210K, S/N 21059200 through 21059502, Riley International Corporation Supplemental AFM No. 1, dated December 19, 1985, or later FAA approved revisions is required. For T210J, S/N 21058140; T210-393 through thru T210-0454, Riley International Corporation Supplemental AFM No. 1 dated March 5, 1986, or later FAA approved revisions is required. For T210G, S/N T210-0198 through T210-0307, Riley International Corporation Supplemental AFM No. 1, dated October 6, 1987, or later FAA approved revision is required. For T210H, S/N T210-308 through T210-0392, Riley International Corporation Supplemental AFM No. 1, dated October 6, 1987, or later FAA approved revisions is required. NOTE: The T210N and M models are certificated only with TSIO-520R engine, the T210J, K and L models are certificated only with the TSIO-520H engine and the T210G & H models are certificated only with TSIO-520-C engine. This STC does not permit the interchanging of these engine between these aircraft models. 3. This approval should not be extended to other aircraft of this model on which other previously approved modifications are incorporated unless it is determined by the installer that the interrelationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of the aircraft. -----------------------------------------------------------End-------------------------------------------------------- 4 4 Add Page ## Every issue (4) - September 18, 2026: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/1f/83/1f83826d4634e4fd8836e57fafcd39cd18abfabc7ff3f6bc33d3a3aef37ebc56) - March 8, 2023: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/56/1d/561dbb257832140b8f8a4330554423c276db3a114f4f8feeb0eb57951a4e6dfd) - May 20, 2019: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/92/3e/923e6ae5826bac6fb153625724cac9ae4680da8eb062b3d5cb0bf20b1bd54166) - May 28, 2002: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/6d/0e/6d0e7975b9c7375f95f755c2ddacb52541910b45268c7158c670e3ef7ef4e396) --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.