# STC SA01902CH - Type: Supplemental type certificate - Status: Current, Amended - Holder: Nextant Aerospace, United States - Description: Installation of two Walter a.s. Model M601E-11A engines and Avia propeller model V.510/90A/B five bladed propellers. - Applied: September 9, 2003 - Status date: February 1, 2018 - Product: Aircraft, Small Airplane - Certification basis: Part 11, Part 21, Part 23 - Data sheets: [TCDS 3A20](https://openairdocs.org/tcds/3A20) - Certificate PDF: https://openairdocs.org/files/sha256/c1/9c/c19c127fe66a1eaadc5376c4fffdd11d4682e8cc5fc549784bf493e289ed88ad - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/4FE678B454971C3F86258232004E35CA.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA01902CH ## ADs that name it (0) None. ## Approved models (3) - Textron Aviation Inc. C90 ([TCDS 3A20](https://openairdocs.org/tcds/3A20)) - Textron Aviation Inc. C90A ([TCDS 3A20](https://openairdocs.org/tcds/3A20)) - Textron Aviation Inc. E90 ([TCDS 3A20](https://openairdocs.org/tcds/3A20)) ## 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. (See sheet 3 for complete certification basis) Applicable to C90 and E90: Installation of two Walter a.s. Model M601E -11A engines and Avia propeller model V.510/90A/B five bladed propellers on Raytheon (Beechcraft) King Air C90 and E90 model airplanes in accordance with Premier Conversions, LLC Installation Manual, Revision A, dated January 9, 2004 and Master Drawing List, Original Issue, dated August 30, 2003, or lat er FAA approved revision. Applicable to C90A: Installation of two General Electric Model H75-100 engines with Electronic Engine Control (EEC) and Electronic Propeller Governor (EPG), and additional upgrades on Beechcraft King Air C90A airplanes in accordance with Nextant Aerospace, LLC, Master Data List, Doc. No. NX0250-MDL0-0000, Revision J, dated November 27, 2017, or later FAA approved revision. 1. Compatibility of this design change with previously approved modifications must be determined by the installer. 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. (See continuation sheet 3 of 3 for additional Limitations and Conditions) Nextant Aerospace 18601 Cleveland Parkway Cleveland, OH 44134 3A20 Textron Aviation C90, E90 and C90A September 9, 2003 May 3, 2004 11/8/2006; 12/5/2013; 6/5/2017 10/26/2015: 2/1/18 (Signature) Timothy Smyth Manager Chicago ACO Branch Compliance and Airworthiness Division (Title) FAA FORM 8110-2-1(10-69) PAGE 3 of 3 PAGES SA01902CH May 03, 2004 February 1, 2018 (Continued) Applicable to C90, E90 1. STC SA4010NM, installation of lower aft fuselage strakes, is required. 2. FAA Approved Premier Conversions LLC Airplane Flight Manual Supplement modified in accordance with this STC, dated, May 3, 2004, FAA Approved May 3, 2004 or later FAA Approved revision, is required. 3. Aircraft Specifications are the same as listed on Type Certificate Data Sheet 3A20 except as listed in the FAA Approved Airplane Flight Manual Supplement for Raytheon C90, and E90 modified in accordance with this STC. 4. Limits for Walter a.s. turboprop engine model M601E-11A and Avia propeller model V.510/90A/B are as published in the FAA Approved Airplane Flight Manual Supplement for Raytheon C90 and E90. 5. The life limit for the Avia propeller model V.510, in accordance with Type Certificate Data Sheet Number P2BO, and as referenced in the Avia Maintenance Manual, is 6,000 flight hours. 6. Power lever positions below flight idle (Beta range) when aircraft is prohibited in flight and can result in severe overspeeding and/or loss of aircraft control. Applicable to C90A 1. This configuration requires the concurrent installation of Raisebeck Propeller STC SA3593NM in accordance with Installation and Rigging Procedures C90-GEH75-100-IM, Revision A, or later FAA approved revision, Garmin G1000 Avionics Installation per STC SA01465WI-D in accordance with Master Drawing List 005-00375-30 Rev 13, dated February 12, 2015 or later FAA approved revision, and Luma Tech LED Annunciation System per AML STC SA02133SE in accordance with Master Drawing List DB1008014 Revision J, dated September 1, 2015 or later FAA approved revision. 2. FAA Approved Airplane Flight Manual, Nextant Aerospace, LLC Doc. No. NX0251-AFMS-0101 Revision IR, approved November 29, 2017, or later FAA approved revision, is required on board the modified aircraft. The certification basis for the changed Beechcraft C90 and E90, as described in this certificate is as follows: a. The type certification basis for the Beechcraft C90 and E90, is shown on TCDS 3A20 for parts not changed or not affected by this change. b. The certification basis for parts changed or affected by this change since the reference date of application, September 9, 2003, is shown in TCDS 3A20. The certification basis for the changed Beechcraft C90A is 14 CFR Part 23 as amended thru 23-25 except as noted below: a. The type certification basis for the Beechcraft C90A, is shown on TCDS 3A20 for parts not changed or not affected by this change. b. The certification basis for parts changed or affected by this change since the reference date of amendment application, January 12, 2016, is 14 CFR Part 23 as amended thru 23 -25 except for the following regulations at later amendments: - 23.301[23-28], 23.903[23-26], 23.1306[23-61], 23.1308[23-57], and 23.1529[23-26] c. Special Conditions in accordance with 14 CFR Part 11: 23-286-SC, Special Condition for Integrated Electronic Engine Control - END - ## Every issue (5) - February 1, 2018: Amended, Current. [certificate](https://openairdocs.org/files/sha256/c1/9c/c19c127fe66a1eaadc5376c4fffdd11d4682e8cc5fc549784bf493e289ed88ad) - June 5, 2017: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/dd/7a/dd7a8bddd47bd76bdc6cdaeae8b2518038c19262c437cbc6ed078edcdd186d0f) - October 26, 2015: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/d2/4f/d24fc0e4a2426a1ec05af3ea72ac564ce0a324a9613da2b1bffbef73afe37308) - December 5, 2013: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/8e/65/8e65984ce58144f7d7e379d8f86b150fa1578f836435610f28fe24ab41501ba9) - November 8, 2006: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/b0/3e/b03e8c648e0a0850e31a8f7e620fe8b96837e4a3403db4e325461fdd72cc10ec) --- 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.