STC ST04535AT

(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