# STC SR02506SE - Type: Supplemental type certificate - Status: Current, Amended - Holder: HeliTrak Inc, United States - Description: Installation of the Collective Pull Down System, installed and maintained - Applied: April 30, 2014 - Status date: September 29, 2017 - Product: Aircraft, Rotorcraft - Certification basis: Part 21, Part 27 - Data sheets: [TCDS H10WE](https://openairdocs.org/tcds/H10WE), [TCDS H11NM](https://openairdocs.org/tcds/H11NM) - Certificate PDF: https://openairdocs.org/files/sha256/83/33/8333ac08ecf4b24cbde21f3ee60c3c29afde050c822416a6eba05eb5ebb230db - Approved model list and other attachments: [SR02506SE_AML.pdf](https://openairdocs.org/files/sha256/6d/2c/6d2c711d54d5ed2086160000b8d64af89ef66d74b837d54d51dd12d456db9d34) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C991081C0A81CB18862581AF00645ADA.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SR02506SE ## ADs that name it (0) None. ## Approved models (6) - Robinson Helicopter Company R22 ([TCDS H10WE](https://openairdocs.org/tcds/H10WE)) - Robinson Helicopter Company R22 ALPHA ([TCDS H10WE](https://openairdocs.org/tcds/H10WE)) - Robinson Helicopter Company R22 BETA ([TCDS H10WE](https://openairdocs.org/tcds/H10WE)) - Robinson Helicopter Company R22 MARINER ([TCDS H10WE](https://openairdocs.org/tcds/H10WE)) - Robinson Helicopter Company R44 ([TCDS H11NM](https://openairdocs.org/tcds/H11NM)) - Robinson Helicopter Company R44 II ([TCDS H11NM](https://openairdocs.org/tcds/H11NM)) ## 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. Un ited S tates of Am erica Department of Transportation - Federal Aviation Administration Supplemental Type Certificate Number SR02506SE This certificate, issued to HeliTrak, Inc. 1620 26th Ave NW Gig Harbor, WA 98335 Part 27 of the Federal Aviation Regulations. Original ProductType Certificate Number: * See attached Federal Aviation Administration (FAA) Make: Approved Model List (AML) SR02506SE for approved Model: aircraft models and applicable airworthiness regulations Description of the Type Design Change: Installation of the Collective Pull Down System, installed and maintained in accordance with the Installation and Maintenance Manual (IMM) and Instructions for Continued Airworthiness documents, as applicable, as listed on AML SR02506SE. Operated in accordance with the HeliTrak Rotorcraft Flight Manual Supplement (RFMS) as listed on AML SR02506SE. Limitations and Conditions: Approval of this change in type design applies to the rotorcraft listed on AML SR02506SE only. This approval should not be extended to other rotorcraft of this model on which other previously approved modifications are incorporated unless it is determined by the installer that the relationship between this change and other previously approved modifications will introduce no adverse effect upon the airworthiness of that rotorcraft. A copy of this certificate, AML SR02056SE, the applicable IMM, the applicable ICA, and the applicable RFMS as listed on AML SR02506SE, must be maintained as part of the permanent records for the modified aircraft. Helicopters shall have a correlator installed. 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. Date of application: April 30, 2014 Date reissued: Date of issuance: October 13, 2016 Date amended: September 29, 2017 (Signature) Manager, Seattle Aircraft Certification Office (Title) ### SR02506SE_AML.pdf **FEDERAL AVIATION ADMINISTRATION (FAA) APPROVED MODEL LIST (AML) SR02506SE FOR** INSTALLATION OF A COLLECTIVE PULL DOWN SYSTEM ISSUE DATE: October 13, 2016 Page 1 of 1 **ITEM ROTORCRAFT MAKE** **ROTORCRAFT MODEL** **ORIGINAL TC NUMBER** **CERTIFICATION** **BASIS FOR** **ALTERATION** **FAA APPROVED** **ROTORCRAFT** **FLIGHT MANUAL** **SUPPLEMENT** **FAA APPROVED** **INSTALLATION AND** **MAINTENANCE MANUAL** **FAA ACCEPTED** **INSTRUCTIONS** **FOR CONTINUED** AIRWORTHINESS AML REV DATE Number Revision* Number Revision* Number Revision** 1. Robinson R22, R22 Alpha, R22 Beta, R22 Mariner H10WE 14CFR27 900082 Revision 1.0, dated 10/11/16 900071 Revision 2.0, dated 9/2/16 900152 Revision 1, dated 9/13/17 2. Robinson R44 R44 II H11NM 14CFR27 900152 Revision 1, dated 9/13/17 900161 Revision 2.0, dated 9/18/17 900153 Rev 1.0, 6/15/17 9/29/17 * Or Later FAA Approved Revision ** Or Later FAA Accepted Revision FAA Approved: Manager, Seattle ACO Branch AMENDED: September 29, 2017 REISSUED: ## Every issue (2) - September 29, 2017: Amended, Current. [certificate](https://openairdocs.org/files/sha256/83/33/8333ac08ecf4b24cbde21f3ee60c3c29afde050c822416a6eba05eb5ebb230db), [SR02506SE_AML.pdf](https://openairdocs.org/files/sha256/6d/2c/6d2c711d54d5ed2086160000b8d64af89ef66d74b837d54d51dd12d456db9d34) - October 13, 2016: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/9c/bb/9cbb08f5516028944d8bf8ee95460c50ba36a36152b0097affd72a12dfc1a66e), [SR02506SE_AML.pdf](https://openairdocs.org/files/sha256/3c/0e/3c0e99fabeb9cc76ff62f217f22a98df15b6066417c113f5f8f159fbfe8cf950) --- 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.