STC ST04570CH

ST04570CH Southeast Aerospace, Incorporated 1399 General Aviation Drive Melbourne, FL 32935 Part 29 the Federal Aviation Regulations.

A3EU Textron Aviation Inc.

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 to alter a product,the holder must give the other person written evidence of that permission.

(Continued on page 5) 3/15/2022 4/2/2026 5/2/2023 5/9/2024

for Jason S. Deutschman Acting Manager, Central Certification Branch Compliance & Airworthiness Division Aircraft Certification Service 6 Installation of the following systems: Universal lnSight Electronic Flight Instrument System (EFIS), Dual Universal UNS 1FW WAAS FMS, Universal Datacom for CPDLC and FANS 1/A, Universal Kapture CVR with with RIPS, Mid Continent Instruments MD 302 electronic standby instrument, Dual Garmin GTX 3000 ADS-B Transponders, Honeywell RDR-2100 weather radar, PS Engineering PAC 45 cockpit audio system in accordance with FAA or ODA approved Master Data List 1040531 Revision (Q), dated 08 MAY 2024 or later FAA or ODA Approved Revision. (Continued on Page 3) BAe.125 Series 800A, BAe. 125 Series 800B, Hawker 800, Hawker 800XP

ST04570CH 04/02/26 6

ST04570CH 04/02/26 Description of Type Design Change (continued):

The Approved Airplane Flight Manual Supplements listed below are required parts of this modification:

(Configuration 01) FAA Approved Airplane Flight Manual Supplement (Universal Insight System) 1041259, Rev H, dated 02 MAY 2024, or later FAA or ODA Approved Revision (Configuration 02) FAA Approved Airplane Flight Manual Supplement (Universal Avionics Kapture CVR System) 1041260, Rev C, dated 8 MAR 2023, or later FAA or ODA Approved Revision (Configuration 02) FAA Approved Airplane Flight Manual Supplement (Universal Avionics Unilink System) 1041261, Rev C, dated 8 MAR 2023, or later FAA or ODA Approved Revision (Configuration 01 and 03) FAA Approved Airplane Flight Manual Supplement (MD302 Standby Instrument) 1041262, Rev C, dated 8 MAR 2023, or later FAA or ODA Approved Revision (Configuration 04) FAA-Approved Airplane Flight Manual Supplement for Installation of UNS-1Fw FMS on Hawker 800XP 30-994020A Rev D, dated 02 MAY 2024, or later FAA or ODA Approved Revision (Configuration 04) FAA-Approved Airplane Flight Manual Supplement for Installation of lnSight System on Hawker 800XP 30-994020B Rev D, dated 02 MAY 2024, or later FAA or ODA Approved Revision (Configuration 05 and 06) FAA-Approved Airplane Flight Manual Supplement for Installation of Kapture CVR System on Hawker 800XP 30-994021 Rev D, dated 02 MAY 2024, or later FAA or ODA Approved Revision (Continued on Page 4)

ST04570CH 04/02/26 Description of Type Design Change (continued):

(Configuration 05) FAA-Approved Airplane Flight Manual Supplement for Installation of UL-801 Unilink System on Hawker 800XP 30-994022 Rev D, dated 02 MAY 2024, or later FAA or ODA Approved Revision (Configuration 04) FAA-Approved Airplane Flight Manual Supplement for Installation of MD302 Standby Instrument on Hawker 800XP 30-994023 Rev C, dated 02 MAY 2024, or later FAA or ODA Approved Revision

The aircraft must be maintained in accordance with FAA accepted Instructions for Continued Airworthiness (ICAs) listed below in addition to the basic airplane maintenance manuals:

(Configuration 01 and 04) Instructions for Continued Airworthiness (Universal Insight System) 1041726, Rev C, dated 1 MAY 2023, or later FAA or ODA Accepted Revision (Configuration 02) Instructions for Continued Airworthiness (Universal Avionics Unilink System and Kapture CVR System) 1041727, Rev C, dated 1 MAY 2023, or later FAA or ODA Accepted Revision (Configuration 01, 03 and 04) Instructions for Continued Airworthiness (MD302 Standby Instrument) 1041728, Rev B, dated 1 MAY 2023, or later FAA or ODA Accepted Revision (Configuration 06) Instructions for Continued Airworthiness - Kapture CVR on Hawker 800XP 30-994601, Rev A, dated 15 JAN 2024, or later FAA or ODA Accepted Revision (Configuration 05) Instructions for Continued Airworthiness - Unilink System on Hawker 800XP 30-994602, Rev B, dated 16 JAN 2024, or later FAA or ODA Accepted Revision

ST04570CH 04/02/26 Limitations and Conditions (continued):

3. This STC is applicable to all serial numbers for Textron Aviation Inc. BAe.125 Series 800A, BAe.125 Series 800B, Hawker 800 and Hawker 800XP aircraft.

Certification Basis:

Based on 14 CFR §§ 21.101, 21.115 and the FAA policy for significant changes in FAA Order 8110.48A, the certification basis for Textron Aviation Inc. BAe.125 Series 800A, BAe.125 Series 800B, Hawker 800 and Hawker 800XP Aircraft Installation of a Universal Insight Electronic Flight Instrument System (EFIS), Installation of a Universal Datacom for CPDLC and FANS 1/A, and an Installation of a Standby Instrument is as follows:

a. The type certification basis for Textron Aviation Inc. BAe.125 Series 800A, BAe.125 Series 800B, Hawker 800 and Hawker 800XP is shown on TCDS A3EU for parts not changed or not affected by the change.

b. The certification basis for parts changed or affected by the change since the reference date of application, March 15, 2022, is based upon TCDS A3EU Based on 14 CFR § 21.101, 21.115 and the FAA policy for significant changes in FAA Order 8110.48A, the certification basis for this modification was determined to be:

Regulations at the amendment level in TCDS A3EU:

25.1(a,b)[Original], 25.29(a,b)[25-23], 25.301(a,b)[25-23], 25.303(-)[25-23], 25.305(a,b) [25-86), 25.307(a)[25-72], 25.307(b,c)[Original], 25.365(a,b,d)[25-87), 25.365(c)[Original],

25.561(a-d)[25-91], 25.571(a-c)[25-54], 25.601(-)[Original], 25.603(a-c)[25-46], 25.605(a) [25-46], 25.609(a,b)[Original], 25.611(-)[Original), 25.613(a)[25-72], 25.613(b-e)[Original],

25.615(a)[25-23], 25.619(a-c)[Original], 25.625(a-c)[Original], (Continued on Page 6) 5 6 Add Page

ST04570CH 04/02/26 Certification Basis (continued):

25.771(a,c,f)[Original), 25.773(a(1))[Original], 25.773(a(2))[25-72], 25.777(a-c,g)[Original],

25.1301(a-d)[Original], 25.1303(a-c)[25-90], 25.1305(c)[25-72], 25.1305(f,g,i,k-n,p-r,w) [Original], 25.1307(c-e)[25-72], 25.1307(f)[Original], 25.1309(a-d)[25-41], 25.1321(a-e) [25-41], 25.1322(a-d)[25-38], 25.1325(c)[25-41], 25.1327(a,b)[Original], 25.1329(a,c,e,f,h) [25-46], 25.1329{b,d,g)[Original], 25.1331(a,b)[25-41], 25.1333(a-c)[25-41], 25.1351(a) [25-72], 25.1353(a,b)[25-41], 25.1355(c)[25-38], 25.1357(a,c-e)[Original), 25.1381(a,b)[25-72],

25.1419(b)[25-23], 25.1431(a-c)[Original], 25.1457(a-g)[25-124), 25.1501(a-c)[Original],

25.1519(-)[Original], 25.1523(a-c)[Original], 25.1525(-)[Original], 25.1529(-)(25-54),

25.1541(a, b)[Original], 25.1543(a)[Original], 25.1543(b)[25-72], 25.1545(-)[Original],

25.1549(a-d)[25-40], 25.1551(-)[Original], 25.1553(-)[Original], 25.1555(a-d)[Original

25.1581(a,b,d)[25-72], 25.1581(c)[Original), 25.1583(a-h)[25-105], 25.1585(a)[25-1OS

Regulations at later amendment level:

25.619(a-c)[25-23], 25.625(a-c)[25-23], 25.1309(e-g)[25-41].

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