STC ST12365IB

IMPORT ST12365IB

EIRTECH AVIATION SERVICES LIMITED

EAST RAMP

SHANNON AIRPORT

SHANNON INDUSTRIAL ESTATE CO. CLARE IRELAND Part 25 Title 14 Code of Federal Regulations A53EU ATR – GIE Avions de Transport Régional ATR42-300, ATR42-320, ATR42-500, ATR72-101, ATR72-102, ATR72-201, ATR72-202, ATR72-211, ATR72-212, ATR72-212A

1. This STC is applicable to all serial numbers for the applicable Make and Model.

(See Limitations and Conditions Continued on Page 3 of 3) 03/17/2026 04/16/2026 John Yoo Manager, International Validation Branch Compliance & Airworthiness Division Aircraft Certification Service 3

1. Installation of ERT/CNG/1579 Fuselage Protection for Unpaved Runway for Belly Fuselage Skin Panels in accordance with Eirtech Aviation Services Ltd. Master Document List Document Number MDL/1579-001, Issue 17, dated February 19, 2026, or later EASA approved revision.

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

2. Maintenance in accordance with Eirtech Aviation Services Ltd. Instructions for Continued Airworthiness as follows:

-ATR42 Model Aircraft: Aircraft Manual Supplement Document Number AMS/1579-001A, Issue 6, dated January 21, 2026, or later EASA approved revision.

-ATR72 Model Aircraft: Aircraft Manual Supplement Document Number AMS/1579-001, Issue 11, dated January 21, 2026, or later EASA approved revision.

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

5. 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.

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