# STC SA2380NM - Type: Supplemental type certificate - Status: Current, Amended - Holder: Aero Air, LLC, United States - Description: Installation of two Hartzell Model HC-B3TN-5(F,N)L/LT10876A(N)S(B)-2Q propellers - Applied: July 29, 1983 - Status date: April 14, 2014 - Product: Aircraft, Small Multi-Engine - Certification basis: Part 3, Part 21 - Data sheets: [TCDS 2A4](https://openairdocs.org/tcds/2A4) - Certificate PDF: https://openairdocs.org/files/sha256/43/0f/430fad4e230ab865cebf5aee9e607930a760d9aefbb64689e2a6c1b8dc1d2d4a - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B7B3056E04EEE19B86257CBD00508D11.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA2380NM ## ADs that name it (0) None. ## Approved models (4) - Twin Commander Aircraft Corporation 690D ([TCDS 2A4](https://openairdocs.org/tcds/2A4)) - Twin Commander Aircraft Corporation 695 ([TCDS 2A4](https://openairdocs.org/tcds/2A4)) - Twin Commander Aircraft Corporation 695A ([TCDS 2A4](https://openairdocs.org/tcds/2A4)) - Twin Commander Aircraft Corporation 695B ([TCDS 2A4](https://openairdocs.org/tcds/2A4)) ## 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. United States of Am erica Department of Transportation - Federal Aviation Administration Supplemental Type Certificate Number SA2380NM This certificate, issued to Aero Air, LLC 2050 NE 25th Avenue Hillsboro, OR 97124 Part 3 of the Civil Air Regulations. Original ProductType Certificate Number: 2A4 Make: Twin Commander Model: 690D, 695, 695A, and 695B Description of the Type Design Change: Installation of two Hartzell Model HC-B3TN-5(F,N)L/LT10876A(N)S(B)-2Q propellers (characters in parentheses indicate optional configurations) on Twin Commander Model 695, 695A, and 695B airplanes equipped with two Honeywell (formerly Allied Signal, Garrett, AiResearch) Model TPE331-10-501K or -511K turboprop engines, or on Twin Commander Model 690D airplanes with Supplemental Type Certificate (STC) SA236CH incorporated (installs TPE331-10T-511K or -513K engines), or on Twin Commander Model 690D airplanes with STC SA00354AT incorporated (installs TPE331-5-511K engines), in accordance with Aero Air, LLC, Installation Instructions Document Number AAI-400, Revision B, dated April 5, 2005, or later Federal Aviation Administration (FAA) approved revision. Limitations and Conditions: Approval of this change in type design applies to the above model aircraft only. The aircraft must have been previously equipped with Cleveland Wheels and Brakes, Kit No. 199-80 in accordance with STC SA497GL. This approval should not be extended to other aircraft of these models on which other previously approved modifications are incorporated unless it is determined that the relationship between this change and any other previously approved modifications, including changes in type design, will introduce no adverse effect upon the airworthiness of that aircraft. The aircraft must be maintained in accordance with Aero Air LLC, Document Number AAI-500, Revision B, dated April 5, 2005. A copy of this certificate and FAA-approved Pilot’s Operating Handbook Supplement, Document Number VT-AEA-01.037, Revision 1, dated April 5, 2005, or later FAA-approved revision, must be maintained as part of the permanent records for the modified aircraft. (See Continutation Sheet Page 3 of 3 Pages) Date of application: July 29, 1983 Date reissued: September 25, 1998 Date of issuance: August 10, 1984 Date amended: 9/25/98; 3/26/01; 4/6/05; 4/14/14 (Signature) Manager, Seattle Aircraft Certification Office (Title) United States of Am erica Department of Transportation - Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number SA2380NM Aero Air, LLC Issued: August 10, 1984 Amended: 9/25/98; 3/26/01; 4/6/05; 4/14/14 Reissued: September 25, 1998 **NOISE LEVEL** The noise level of the aircraft with these propellers is less than that of the original aircraft. No determination has been made by the Federal Aviation Administration that the noise levels of these aircraft are, or should be, acceptable or unacceptable for operation at, into, or out of, any airport. The above statement notwithstanding, the relative noise level of the modified aircraft has been verified by and approved by the Federal Aviation Administration in noise level tests. 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. -END- ## Every issue (2) - April 14, 2014: Amended, Current. [certificate](https://openairdocs.org/files/sha256/43/0f/430fad4e230ab865cebf5aee9e607930a760d9aefbb64689e2a6c1b8dc1d2d4a) - April 6, 2005: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/e4/3b/e43b2db6c8838bd42cad82d3d48b0eb1091bd068cc4c5f6c2ae8f4b41b9e04a4) --- 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.