STC ST04531AT

-March 17, 2017 February 17, 2021

United States of America Department of Transportation Federal AviationAdministration Supplemental TypeCertificate Issued December 22, 2021 Number: ST04531AT This certificate issued to: Phoenix Air Group, Inc.

100 Phoenix Air Drive, S.W.

Cartersville, GA 30120 Part 25 of the Federal Aviation Regulations.

Make: Gulfstream Aerospace Corporation Original Product 7\SH&HUWLILFDWH1XPEHU A12EA Model: G-1159A (GIII) Series Description of Type Design Change:

Installation of a cargo door on the right hand side of Gulfstream G-1159A (GIII) series aircraft in accordance with Avenger Master Drawing List, AAS-MDL-13-001 Revision NC, dated September 16, 2021, or later FAA-approved revision.

1. Avenger Aircraft Flight Manual Supplement, AAS-SSR-21-034, Revision -, dated December 22, 2021, or later FAA-approved revision, is required and must be carried in the aircraft during all flights.

(Limitations and Conditions continued on page 3 of 4)

Date of Application: January 28, 2019 Date Reissued:

Date of Issuance: December 22, 2021 Date Amended:

Title: (for) Christine M. Underwood Manager, Atlanta ACO Branch $Q\DOWHUDWLRQRIWKLVFHUWLILFDWHLVSXQLVKDEOHE\DILQHRIQRWH[FHHGLQJRULPSULVRQPHQWQRWH[FHHGLQJ\HDUVRUERWK7KLVFHUWLILFDWHPD\EHWUDQVIHUUHGRUPDGH DYDLODEOHWRWKLUGSHUVRQVE\OLFHQVLQJDJUHHPHQWVLQDFFRUGDQFHZLWK&)53RVVHVVLRQRIWKLV6XSSOHPHQWDO7\SH&HUWLILFDWH 67& GRFXPHQWE\SHUVRQVRWKHUWKDQ WKH67&KROGHUGRHVQRWFRQVWLWXWHULJKWVWRWKHGHVLJQGDWDQRUWRDOWHUDQDLUFUDIWDLUFUDIWHQJLQHRUSURSHOOHU7KH67&¶VVXSSRUWLQJGRFXPHQWDWLRQ GUDZLQJVLQVWUXFWLRQV SURSHOOHUPXVWSURYLGHWKDWSHUVRQZLWKZULWWHQSHUPLVVLRQDFFHSWDEOHWRWKH)$$ 5HI&)5   )$$)RUP 03/21) 3DJHRIBBB 4

I United States of America Department of Transportation Federal AviationAdministration Supplemental TypeCertificate Issued December 22, 2021 Number: ST04531AT

Date oI transfer:

$Q\DOWHUDWLRQRIWKLVFHUWLILFDWHLVSXQLVKDEOHE\DILQHRIQRWH[FHHGLQJRULPSULVRQPHQWQRWH[FHHGLQJ\HDUVRUERWK7KLVFHUWLILFDWHPD\EHWUDQVIHUUHGRUPDGH DYDLODEOHWRWKLUGSHUVRQVE\OLFHQVLQJDJUHHPHQWVLQDFFRUGDQFHZLWK&)53RVVHVVLRQRIWKLV6XSSOHPHQWDO7\SH&HUWLILFDWH 67& GRFXPHQWE\SHUVRQVRWKHUWKDQ WKH67&KROGHUGRHVQRWFRQVWLWXWHULJKWVWRWKHGHVLJQGDWDQRUWRDOWHUDQDLUFUDIWDLUFUDIWHQJLQHRUSURSHOOHU7KH67&’s supporting documentation (drawings, instructions, SURSHOOHUPXVWSURYLGHWKDWSHUVRQZLWKZULWWHQSHUPLVVLRQDFFHSWDEOHWRWKH)$$ 5HI&)5   )$$)RUP 03/2) 3DJHRIBBB 4

United States of America Department of Transportation Federal AviationAdministration Supplemental TypeCertificate Issued December 22, 2021 (Continuation Sheet) Number: ST04531AT

2. This approval should not be extended to other aircraft of this model on which other previously approved modifications are incorporated unless it is determined by the installer that the interrelationship between this change and any of those other previously approved modifications will produce no adverse effect upon the airworthiness of that airplane.

3. If the holder agrees to permit another person to use this certification to alter the product, the holder must give the other person written evidence of that permission.

4. Avenger Instructions for Continued Airworthiness (ICA), AAS-ICA-14-001 Revision A, dated August 18, 2021, or later FAA accepted revisions, shall be made available to the operator at the time of installation.

5. Required structural inspections for compliance with 14 CFR 25.571 are listed in the Airworthiness Limitations section of the Avenger Instructions for Continued Airworthiness ICA), AAS-ICA-14-001, Revision A, dated August 18, 2021, or later FAA-approved revisions.

6. This STC does not include the aircraft interior. A separate FAA approved interior must be installed.

7. The aircraft modified per this STC are not RVSM compliant. A separate RVSM approval must be obtained.

Certification Basis:

14 CFR Part 25 Regulations Based on 14 CFR §§ 21.115 and 21.101, and the FAA policy for significant changes in FAA Order 8110.48, the certification basis for the Gulfstream G-1159 (GIII) series aircraft modified by the installation of a cargo door is as follows:

a. The type certification basis for the Gulfstream G-1159A (GIII) series aircraft is shown on TCDS A12EA 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, January 28, 2019, is based upon part 25 as amended by amendment 25-145. Based on 14 CFR §§ 21.115 and 21.101, and FAA policy for significant level changes in FAA Order 8110.48, the certification basis for this modification was determined to be:

Regulations at the latest amendment level 25-0 through 25-145:

14 CFR §§ 25.1 25.23 25.27 25.29

25.301 25.303 25.305 25.307

25.337 25.365 25.367 25.471

25.473 25.489 25.495 25.509

25.561 25.581 25.601 25.603

25.605 25.607 25.609 25.611(a)

25.613 25.619 25.623 25.625

25.629 25.783(a)(1)(2)(3)(5)(b)(c)(1)(d)(1)(2)(3)(5)(6)(i)(iii)(e)(1)(2)(3)(i)(ii)(4)(f)

25.789(a) 25.801(e) 25.841(a) 25.843(a)(b)(4)

25.853(a) 25.1301(a) 25.1307(c) 25.1309(a)-(e) $Q\DOWHUDWLRQRIWKLVFHUWLILFDWHDQGRUWKH7\SH&HUWLILFDWH'DWD6KHHWLVSXQLVKDEOHE\DILQHQRWH[FHHGLQJRULPSULVRQPHQWQRWH[FHHGLQJ\HDUVRUERWK7KLV FHUWLILFDWHPD\EHWUDQVIHUUHGRUPDGHDYDLODEOHWRWKLUGSHUVRQVE\OLFHQVLQJDJUHHPHQWVLQDFFRUGDQFHZLWK7LWOHRIWKH&RGHRI)HGHUDO5HJXODWLRQVSDUWVHFWLRQ &)5 $WUDQVIHUPXVWEHHQGRUVHGDVSURYLGHGRQWKHUHYHUVHKHUHRI$7\SH&HUWLILFDWHKROGHUZKRDOORZVDSHUVRQWRXVHWKH7\SH&HUWLILFDWHWRPDQXIDFWXUHD QHZDLUFUDIWDLUFUDIWHQJLQHRUSURSHOOHUPXVWSURYLGHWKDWSHUVRQZLWKDZULWWHQOLFHQVLQJDJUHHPHQWDFFHSWDEOHWRWKH)$$ 5HI&)5  3 4)$$)RUP 03/2  3DJHBBBRIBBB

United States of America Department of Transportation Federal AviationAdministration Supplemental TypeCertificate Issued December 22, 2021 (Continuation Sheet) Number: ST04531AT Regulations at the latest amendment level 25-0 through 25-145: (Continued) 14 CFR §§ 25.1322(a)(b)(1)(c)(2)(3)(d)(e)(1)(i)(ii) 25.1351(a)(1)

25.1357(a)(c)(f) 25.1431(a)(c)(d) 25.1435(a)(b)(c)(2)(3)

25.1438(b)(c) 25.1519 25.1529 25.1541

25.1581 25.1583 25.1585 Regulations at an earl 14 CFR §§ ier amendment (as noted):

25.321 (25-23) 25.331 (25-23) 25.333 (25-0) 25.341 (25-0)

25.345 (25-0) 25.349 (25-23) 25.351 (25-23 ) 25.473 (25-23)

25.479 (25-23) 25.481 (25-0) 25.491 (25-0) 25.493 (25-23)

25.499 (25-23) 25.571 (25-54) 25.869(a)(4) (25-113)

25.1325(b)(c)(1)(2)(ii) (25-108) 25.1353(a)(b)(d) (25-113) Environmental Standards Noise Standards: “No Acoustical Change” per § 21.93(b) as a result of this STC. There are no changes to the aircraft as a result of the modification that would affect noise standards.

Fuel Venting and Exhaust Emissions Standards: “No Emissions Change” as result of this STC. There are no changes to the aircraft as a result of the modification that would affect emissions or fuel venting.

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