STC ST04600CH

ST04600CH Nexus Climate Control LLC 146 Geurink Blvd.

Holland, MI 49423 Part 25 Title 14, Code of Federal Regulations A-669 The Boeing Company DC3C-S1C3G Installation of the Nexus NX301001 air conditioning system in accordance with the Nexus Master Drawing List (MDL301, Revision -, dated March 3, 2022*), and Installation Instructions (IN301001, Revision New, dated July 15, 2022*). Nexus Airplane Flight Manual Supplement (AFMS301001, Revision -, dated December 22, 2022*) is required with this installation.

*or later FAA-approved revision (Description of Type Design Change continued on page 3)

1. The installer must determine whether this design change is compatible with previously approved modifications.

2. You cannot use descriptive data from this design change to duplicate other products. This approval is limited to only the installation made in Boeing, DC3C-S1C3G Serial No. 14037. This STC does not permit manufacturing of parts for multiple installations.

(Limitations and Conditions continued on page 3) December 15, 2019 March 2, 2023 Steven L. Lardinois Manager, Systems Section Chicago ACO Branch 4

ST04600CH 4

ST04600CH Date Issued: March 2, 2023

Description of Type Design Change (cont.):

The aircraft must be maintained in accordance with the FAA-accepted Instructions for Continued Airworthiness (ICA301001, Revision A, dated January 19, 2022, or later FAA-accepted revision).

Limitations and Conditions (cont.):

3. If the holder agrees to permit a person to use this certificate to alter a product, the holder must give this person written evidence of that permission.

4. A copy of this certificate must be maintained as part of the permanent records of the modified aircraft.

Certification Basis:

Based on 14 CFR §21.115 and §21.101, the FAA policy for design changes that are identified as not significant in FAA Order 8110.48, the certification basis for the aircraft listed on this STC is as follows:

a. The type certification basis for parts not changed or not affected by the change is shown in the TCDS for this aircraft.

b. The modification certification basis for parts changed or affected by the change is based on 14 CFR Part 25 as follows: 25.303 Amdt. 25-23, 25.305 Amdt. 25-23, 25.307 Amdt. 25-23, 25.571(a-c) Amdt. 25-132, 25.581 Amdt. 25-23, 25.601 Amdt. 25-0,

25.603(a)(b) Amdt. 25-46, 25.605(a) Amdt. 25-46, 25.607(b) Amdt. 25-23, 25.609(a)(b) Amdt. 25-0, 25.611 Amdt. 25-123, 25.613 Amdt. 25-112, 25.771(a) Amdt. 25-4, 25.777

(a) Amdt. 25-46, 25.831 Amdt. 25-89, 25.869 Amdt. 25-123, 25.1301(a) Amdt. 25-123,

25.1309(a-e) Amdt. 25-123, 25.1310 Amdt. 25-123, 25.1321 Amdt. 25-41, 25.1351 Amdt. 25-72, 25.1353 Amdt. 25-123, 25.1355 Amdt. 25-38, 25.1357 Amdt. 25-123, (Certification Basis continued on page 4)

ST04600CH Date Issued: March 2, 2023

Certification Basis (cont.):

25.1360 Amdt. 25-123, 25.1363 Amdt. 25-0, 25.1365 Amdt. 25-123, 25.1381 Amdt.

25-72, 25.1529 Amdt. 25-26, 25.1541 Amdt. 25-0, 25.1543 Amdt. 25-72, 25.1555(a) Amdt. 25-0, 25.1581 Amdt. 25-72, 25.1583 Amdt. 25-105, 25.1585 Amdt. 25-0.

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