STC ST12335IB

IMPORT ST12335IB Lufthansa Technik AG Weg Beim Jaeger 193 22335 Hamburg, Germany 25 Title 14 Code of Federal Regulations T00021SE The Boeing Company 787-9

1.Installation of B787-9 Cabin Modification in accordance with Lufthansa Technik AG Supplemental Type Definition Document No. STDD00-23/05M, Iss.Rev 01.00, dated March 2, 2026, or later EASA approved revisions.

(See Description of Type Design Change Continued on Page 3 of 3)

1. This STC is applicable to the following serial numbers for the applicable Make and Models: 63347, 63348, 63349, 63350, 66874, 62177, 66408.

(See Limitations and Conditions Continued on Page 3 of 3) July 9, 2024 March 11, 2026 John Yoo Manager, International Validation Branch Compliance & Airworthiness Division Aircraft Certification Service 3

IMPORT ST12335IB 3

IMPORT ST12335IB Date of Issuance: March 11, 2026

Description of Type Design Change (continued):

2. Maintenance in accordance with Lufthansa Technik AG Instructions for Continued Airworthiness A-00-25/78-ICA, Issue 02, Revision 00, dated February 24, 2026, or later EASA approved revisions.

2. The following Boeing modification/service bulletins must be installed prior or concurrently:

- B787-81205-SB330030-00, Rev 001, dated October 11, 2025: LIGHTS - Emergency Lighting - Installation of Emergency Lighting Power System.

- B787-81205-SB420054-00, Rev 001, dated October 16, 2025: INTEGRATED MODULAR AVIONICS - Common Core System - Option Selection Software Installation.

- B787-81205-RB440281-00, Rev RC01, dated February 27, 2026: CABIN SYSTEMS - Cabin Services System - Cabin Services System (CSS) and Airline Selection Option (ASO) Software Installation and Safran Passenger Innovations In-Flight Entertainment Activation.

3. Maintenance must be done in accordance with the Airworthiness Limitation (AWL) documents listed in the Instructions for Continued Airworthiness referenced in the Description section.

4. Door rating: C-A-C-A.

5. Maximum passengers: 287 - There are 287 passenger seats installed. Out of those 287 seats, 24 business class and 7 economy class transition row seats are blocked.

This results in an actual passenger capability of 256 passengers.

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

7. If the holder agrees to permit another person to use the certificate to alter the product, the holder shall give the other person written evidence of that permission.

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