# STC ST04535AT - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Chippewa Aerospace Inc, United States - Description: Installation of the CES-170 Emergency Light Power Unit (ELPU) - Applied: June 24, 2021 - Status date: April 18, 2022 - Product: Aircraft, Large Airplane - Certification basis: Part 21, Part 25 - Data sheets: [TCDS A56NM](https://openairdocs.org/tcds/A56NM), [TCDS A57NM](https://openairdocs.org/tcds/A57NM) - Certificate PDF: https://openairdocs.org/files/sha256/e1/35/e135a3c6f96630037666b32d12c020f0730c44b67f7b7712cc602e214e6e17e8 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/44555C04DC13C2C0862588290053BC33.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/ST04535AT ## ADs that name it (0) None. ## Approved models (14) - Embraer S.A. ERJ 170-100 LR ([TCDS A56NM](https://openairdocs.org/tcds/A56NM)) - Embraer S.A. ERJ 170-100 SE ([TCDS A56NM](https://openairdocs.org/tcds/A56NM)) - Embraer S.A. ERJ 170-100 STD ([TCDS A56NM](https://openairdocs.org/tcds/A56NM)) - Embraer S.A. ERJ 170-100 SU ([TCDS A56NM](https://openairdocs.org/tcds/A56NM)) - Embraer S.A. ERJ 170-200 LL ([TCDS A56NM](https://openairdocs.org/tcds/A56NM)) - Embraer S.A. ERJ 170-200 LR ([TCDS A56NM](https://openairdocs.org/tcds/A56NM)) - Embraer S.A. ERJ 170-200 STD ([TCDS A56NM](https://openairdocs.org/tcds/A56NM)) - Embraer S.A. ERJ 170-200 SU ([TCDS A56NM](https://openairdocs.org/tcds/A56NM)) - Embraer S.A. ERJ 190-100 ECJ ([TCDS A57NM](https://openairdocs.org/tcds/A57NM)) - Embraer S.A. ERJ 190-100 IGW ([TCDS A57NM](https://openairdocs.org/tcds/A57NM)) - Embraer S.A. ERJ 190-100 LR ([TCDS A57NM](https://openairdocs.org/tcds/A57NM)) - Embraer S.A. ERJ 190-100 STD ([TCDS A57NM](https://openairdocs.org/tcds/A57NM)) - Embraer S.A. ERJ 190-200 IGW ([TCDS A57NM](https://openairdocs.org/tcds/A57NM)) - Embraer S.A. ERJ 190-200 STD ([TCDS A57NM](https://openairdocs.org/tcds/A57NM)) ## 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. (for) Christina M. Underwood Manager, Atlanta ACO Branch Compliance and Airworthiness Division Aircraft Certification Service ST04535AT Chippewa Aerospace Inc. 490 Allied Dr. Conway SC, 29526 Part 25 the Federal Aviation Regulation A56NM, A57NM Yaborã Indústria Aeronáutica (Embraer) ERJ-170-100, ERJ-170-200, ERJ-190-100, ERJ-190-200 Installation of the CES-170 Emergency Light Power Unit (ELPU) per Chippewa Aerospace, Master Data List (MDL) Document No. 170-3350-01-0001 Revision 1 dated January 20, 2022 or later FAA-approved revisions. 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 other previously approved modifications will produce no adverse effect upon the airworthiness of that airplane. (See continuation sheet 3.) June 24, 2021 April 18, 2022 February 22, 2022 3 ST04535AT 3 ST04535AT Limitations and Conditions - continued: 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. Instructions for Continued Airworthiness (ICA): Chippewa Aerospace Inc. Document No. 170-3350-01-0002 Rev. 2 dated February 07 2022 or later FAA approved. Certification Basis: Based on 14 CFR §§ 21.115 and 21.101, and the FAA policy for significant changes in FAA Order 8110.48, the certification basis for the Yaborã Indústria Aeronáutica (Embraer) ERJ-170-100, ERJ-170-200, ERJ-190-100, ERJ-190-200 Series aircraft is as follows: a. The type certification basis for Yaborã Indústria Aeronáutica (Embraer) ERJ-170-100, ERJ-170-200, ERJ-190-100, ERJ-190-200 airplane is shown on TCDS A56NM, A57NM for parts not changed or not affected by the change. b. The certification basis for parts changed or affected by the change since the reference date of application, June 24, 2021, is based upon part 25 as amended by Amendment 25-146. Based on 14 CFR §§ 21.115 and 21.101, and the FAA policy for significant changes in FAA Order 8110.48, the certification basis for this modification was determined to be: Regulations at the latest amendment 25-0 through 25-146: 25.301, 25.303, 25.305, 25.307, 25.561, 25.601, 25.603, 25.605, 25.609, 25.613, 25.789, 25.811, 25.812, 25.1301, 25.1307, 25.1309, 25.1316, 25.1317, 25.1353, 25.1519, 25.1525, 25.1529 Regulations at the amendment level in TCDS A56NM, A57NM: 25.1351 ----------------------------------------------------END-------------------------------------------------------- 3 3 ## Every issue (2) - April 18, 2022: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/e1/35/e135a3c6f96630037666b32d12c020f0730c44b67f7b7712cc602e214e6e17e8) - February 24, 2022: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/ee/5d/ee5df9c7c394be59ae0c37788afc9ee15e62b233c443cd957abb402346680874) --- 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.