# STC SA04581CH

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: AVCON INDUSTRIES INC, USA
- Description: INSTALL NOSE EXTENSION WITH EO/IR TURRET LIFT MECHANISM AND EXTERNAL BELLY RADAR POD
- Applied: June 1, 2023
- Status date: June 1, 2023
- Product: Aircraft, Large Airplane
- Certification basis: Part 23
- Data sheets: [TCDS A24CE](https://openairdocs.org/tcds/A24CE)
- Certificate PDF: https://openairdocs.org/files/sha256/15/96/1596fd78ec3b60917545c58b5e88991e866f3f31b80ce5c894383f3e8a174a84
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID159898816420230615202543.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA04581CH

## ADs that name it (0)

None.

## Approved models (2)

- Textron Aviation Inc. B300 ([TCDS A24CE](https://openairdocs.org/tcds/A24CE))
- Textron Aviation Inc. B300C ([TCDS A24CE](https://openairdocs.org/tcds/A24CE))

## What the certificate says

Some pages are OCR from the scanned FAA certificate. OCR can misread letters and numbers.

FEDERAL AVIATIO United States of America Department of Transportation * Federal Aviation Administration Supplemental Type Certificate Number: SA04581CH This certificate issued to: Avcon Industries, Inc.

714 N. Oliver Road Newton, KS 67114 Part 23 of the Federal Aviation Regulations Type Certificate Number: . A24CE Original Product Model: B300 / B300C Make: Textron Aviation Inc.

Installation of a Nose Extension with EO/IR Turret Lift Mechanism and External Belly Radar Pod in accordance with Avcon Master Document List, Document Number 07401000, Revision IR dated May 30, 2023, or later FAA/ODA Approved Revision.

1. This STC is applicable to all serial numbers for the Textron Aviation Inc. B300 and B300C models.

Date of Application: July 5, 2022 Date Reissued:

Date of Issuance: June 1, 2023 Date Amended:

Dan Trigg, ODA Administrator StandardAero, Springfield, IL Title: ODA-100079-CE FAA Form 8110-2 (11/20) SUPERSEDES PREVIOUS EDITION Page 1 of _5

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Date oI transfer:

SA04581CH

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FAA Approved Aircraft Flight Manual Supplement (AFMS), document number 07407100 Revision (IR), dated April 27, 2023, or later FAA/ODA Approved Revision is a required part of this modification The aircraft must be maintained in accordance with FAA/ODA Approved Instructions for Continued Airworthiness, document number 303-801 Revision (A), dated April 20, 2023, or later FAA/ODA Approved Revision in addition to the basic aircraft maintenance manuals.

The aircraft must be maintained in accordance with FAA/ODA Approved Instructions for Continued Airworthiness, document number 303-811 Revision (A), dated April 21, 2023, or later FAA/ODA Approved Revision in addition to the basic aircraft maintenance manuals.

Limitations and Conditions: - cont.

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

3. 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.

4. The following items are either concurrent or prerequisite embodiment requirements for the installation of this STC;

a) Fuselage underside rail mounting provisions per STC SA01902WI (or Avcon drawing 1809605)

b) PT6A-67A engines per Textron Aviation Kit 130-9102 (including 17,500 lbs MTOW)

c) Dual ventral fins per Textron Aviation Kit 130-4404 35

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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. B300/B300C Installation of a Nose Extension with EO/IR Turret Lift Mechanism and External Belly Radar Pod is as follows:

a. The type certification basis for the Textron Aviation Inc. B300/B300C is shown on TCDS A24CE 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, July 05, 2022, is based upon TCDS A24CE. Based on 14 CFR § 21.101, 21.115 and the FAA policy for significant changes in FAA Order 8 Regulations at the amendment level in TCDS A24CE:

14 CFR 21.93(b)[21-97].

14 CFR 23.1(a,b)[23-34], 23.21(a(1),b)[Original], 23.29(b)[23-21],

23.45(a(2),b,c,e,f)[23-34], 23.49(a(2)(3)(4)(5)(6),b)[23-50], 23.51(d)[23-34],

23.53(c)[23-34], 23.57(c(1)(3(i)))[23-34], 23.59(a(1))[23-34], 23.61(b(1))[23-34],

23.65(a(1)(2)(3),c,d)[23-34], 23.67(e)[23-34], 23.77(c)[23-34], 23.141(-)[23-17],

23.143(a-c)[23-17], 23.145(a-e)[23-17], 23.147(a,b)[Original], 23.149(a,c,d)[23-21],

23.153(a-c)[23-14], 23.157(a(2),b(1)(2)(4),c(2),d(1)(2)(4))[23-14],

23.161(a,b(2),c(1)(2)(3(ii)),d)[23-34], 23.171(-)[Original], 23.173(a-c)[23-34],

23.175(a-d)[23-34], 23.177(a)[23-21], 23.181(a,b)[23-21],

23.201(a-d,e(1)(2)(4)(5)(6))[23-50], 23.203(a,b,c(1)(2)(4)(5)(6))[23-50],

23.207(a,b,d,e,Exemption 5077 for c)[23-50], 23.233(a-c)[Original],

23.251(a,b)[23-62], 23.301(a,b)[23-28], 23.303(-)[Original], 23.305(a,b)[Original],

23.307(a)[Original], 23.321(a,b)[Original], 23.331(a,b)[Original], 23.333(a-d)[23-34],

23.335(a-d)[23-34], 23.337(a-c)[23-34], 23.341(-)[23-34], 23.345(a-d)[23-23],

23.347(-)[Original], 23.349(a,b)[23-34], 23.351(-)[Original], 23.365(a-d)[Original],

23.367(a,b)[23-7], 23.421(a,b)[23-7], 23.423(a,b)[23-7], 23.425(a-d)[23-7],

23.427(a-c)[23-14], 23.441(a,c)[23-28], 23.443(a-c)[23-34], 23.445(a-c)[23-42],

23.471(-)[Original], 23.473(a-g)[23-28], 23.477(-)[Original], 23.479(a-d)[23-17],

23.481(a,b)[Original], 23.483(-)[Original], 23.485(a-c)[Original], 23.493(a-c)[Original], 45

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23.499(a-c)[Original], 23.507(a-c)[23-14], 23.509(a-d)[23-14], 23.511(a-c)[23-7],

23.561(a,b)[23-34], 23.571(a)[23-34], 23.572(b)[23-34], 23.601(-)[Original],

23.603(a,b)[23-23], 23.605(a)[23-23], 23.607(-)[23-17], 23.609(a,b)[Original],

23.611(-)[23-48], 23.613(a-e)[23-45], 23.615(a)[23-7], 23.619(-)[23-7],

23.625(a-c)[23-7], 23.627(-)[Original], 23.629(b)[23-31], 23.771(a)[23-14],

23.773(a(1),b)[23-14], 23.777(a)[23-33], 23.1301(a-d)[23-20], 23.1307(b(2)(3))[23-23],

23.1309(a-e)[23-49], 23.1322(b-d)[23-17], 23.1323(a-d)[23-34],

23.1351(a(1)(2(ii)),b(1(i))(4))[23-49], 23.1357(a,c)[23-43], 23.1359(c)[23-49],

23.1365(a,b)[23-14], 23.1367(a-d)[Original], 23.1381(a,b)[Original],

23.1383(a,b)[Original], 23.1401(a(1)(2),b)[23-20], 23.1419(b)[23-14],

23.1431(a,b)[23-49], 23.1501(a,b)[23-21], 23.1505(c)[23-7], 23.1529(-)[23-26],

23.1541(a-c)[23-21], 23.1559(a(2))[23-21], 23.1581(a(1),b,d)[23-34],

23.1583(a(3(i)(iii)))[23-62], 23.1585(a(1)(2), j)[23-62],

23.1587(a(3)(5)(6)(7)(8),c(4)(5),d(1)(2)(3))[23-34], 23.1589(a)[23-13].

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## Every issue (1)

- June 1, 2023: Issued, Current. [certificate](https://openairdocs.org/files/sha256/15/96/1596fd78ec3b60917545c58b5e88991e866f3f31b80ce5c894383f3e8a174a84)

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