STC ST12294SE

ST12294SE AeroMech Incorporated 3977 Harbour Pointe Blvd SW Mukilteo, WA 98275 Part 25 Title 14, Code of Federal Regulations A3EU Textron Aviation Inc.

HS.125 Series 700A/B, BAe.125 Series 800A/B, Hawker 750/800/800XP/850XP/900XP.

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

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

See continuation sheet 3 December 4, 2025 July 14, 2026 Sally Robinson ODA Administrator AeroMech, Inc., ODA-635882-NM 4 Installation of Starlink Aviation System in accordance with the Required Data:

1. Master Drawing List (MDL) AM0414-DL01, Revision -, dated 10 July 2026 or later FAA approved revision.

2. Instructions for Continued Airworthiness AM0414-IC01, Revision -, dated 10 July 2026 or later FAA accepted revision.

ST12294SE July 14, 2026 4

ST12294SE July 14, 2026 Description of Type Design Change (continued from sheet 1):

3. Airplane Flight Manual Supplement (AFMS) AM0414-FM01, Revision -, dated 07 May 2026, or later FAA approved revision.

Limitation and Conditions (continued from sheet 1):

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

4. The system installed by this STC is intended to provide a non-essential, non-required internet connection to portable electronic devices (PED). Use of this system for any other purpose or connection of this system to other onboard equipment may require additional regulatory approval.

5. Operational approval to permit use of Portable Electronic Devices (PED) is not part of this STC. Further approvals may be required to allow the operation of PED.

6. This STC is applicable to all serial numbers of Textron Aviation Inc. Model HS.125 Series 700A/B, BAe.125 Series 800A/B, Hawker 750/800/800XP/850XP/900XP Series Aircraft.

7. Equivalent Level of Safety Findings have been made for the following regulation(s): 14 CFR

25.251(b) Vibration and buffeting. Documented in ELOS Memorandum AMI-PRG-0414-01- T-25.251.

(Continuation Sheet) Number

FAA 8110-2 (

10/24 )

Page ___ of ___ Certification Basis:

Based on 14 CFR §21.101 and 21.115, and the FAA policy for changed aeronautical products in FAA Order 8110.48, the type certification basis for this modification is as follows:

1. For parts not changed or not affected by this modification see the original certification basis for the Textron Aviation Inc. Model HS.125 Series 700A/B, BAe.125 Series 800A/B, Hawker 750/800/800XP/850XP/900XP Series Aircraft, shown on TCDS A3EU.

2. For parts changed or affected by this modification since the date of application, the certification basis is as follows:

14 CFR Part 25 regulations at the amendment level 25-0:

14 CFR 25.123(b), 25.611, 25.771(a), 25.777(a), 25.1357(a)(c), 25.1431(a)(c).

14 CFR Part 25 regulations at intermediate amendment level:

14 CFR 25.119(a) [25-84], 25.121 [25-84], 25.307(a) [25-72],

25.365(a)(b)(d)(e)(3) [25-54], 25.571(a)(b)(e)(1) [25-54], 25.629 [25-77],

25.869(a)(4) [25-113], 25.1309(g) [25-41], 25.1353(a)(c) [25-42], 25.1419(b) [25-23],

25.1583 [25-105], 25.1587 [25-72].

14 CFR Part 25 regulations at amendment level through 25-153:

14 CFR 25.29, 25.115(b), 25.251(a)(b)(c)(d), 25.301(a)(b), 25.303, 25.305(a)(b)(e), 25.321,

25.331, 25.333(a), 25.335, 25.337(a)(b)(c), 25.341(a), 25.351, 25.561(a)(b)(3)(c), 25.581,

25.601, 25.603(a)(b)(c), 25.605(a), 25.609(a)(b), 25.613(a)(b), 25.623, 25.625(a)(b)(c),

25.789(a), 25.853(a), 25.899, 25.1301, 25.1302(a)(b), 25.1307(c), 25.1309(a)(2), 25.1351(a),

25.1501, 25.1529, 25.1541(a)(1)(b), 25.1555(a), 25.1581, 25.1585(a)(1)(2).

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