STC ST09843DS

ST09843DS United Airlines 4933 Wright Rd.

Houston, TX 77032 Part 25 & 26 the Title 14, Code of Federal Regulations A1NM The Boeing Company 767-300 Series

(1) The installation should not be incorporated in any aircraft unless it is determined that the interrelationship between this installation and any previously approved configuration will not introduce any adverse effect upon the airworthiness of the aircraft.

(continued on page 3) 09/16/2025 01/23/2026 12/17/2025 Raju Tumarada, ODA Administrator 3 ER2500R01864, Rev B, dated December 6, 2025. ODA project number: 98430. (1) 767-300 Passenger Service System (PSS) Upgrade in accordance with United Airlines Master Drawing List 2500DA16613 Rev A, dated December 15, 2025, or later FAA approved revision.

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ST09843DS 3

ST09843DS Description of Type Design Change:

(2) Supplemental Instructions for Continued Airworthiness, Document Number 2500R01865C Rev -, dated December 11, 2025 or later approved FAA revision. (3) EWIS ICA Document Number E25009-2334-R004 Rev -, dated October 20, 2025 or later approved FAA revision.

(2) If the holder agrees to permit another person to use this certificate to alter a product, the holder must give the other person written evidence of that permission.

Certification Basis:

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

a. The type certification basis for parts not changed or not affected by the change is shown in TCDS A1NM

b. The certification basis for parts changed or affected by this modification since the reference application date September 16, 2025 is based upon the type certification basis shown in TCDS A1NM with the following exceptions.

14 CFR Part Amdt

25.981 (a)(3) 25-102

25.853 (a) 25-83

25.869 (a)(4) 25-72

ST09843DS Issued December 17, 2025 ST09843DS Reissued January 23, 2026 --END-- 3 3 Add Page