STC SA11298DS

SA11298DS Avcon Industries 714 N Oliver Rd. PO BOX 748 Newton, KS 67114 23 Code of Federal Regulations A24CE Textron Aviation Inc B300/B300C Installation of two 400-AMP starter generators in place of 300-AMP starter generators on Textron Aviation Inc B300/B300C aircraft series in accordance with "Master Data List", document number 646-00-0001 revision IR, dated 8/10/2021 or later FAA approved revision; FAA Approved Airplane Flight Manual Supplement, document number 646-00-0037 revision G, dated 7/20/2021 or later FAA approved revision;

Instructions for Continued Airworthiness, document number 646-00-0031 revision D, dated 7/19/2021 or later FAA accepted revision.

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

(See continuation sheet 3 of 4) June 30, 2020 April 24, 2023 August 11, 2021 August 24, 2022 Manager, Central Certification Branch Compliance & Airworthiness Division Aircraft Certification Service 4

SA11298DS 4

SA11298DS

Limitations and Conditions: (Continuation sheet 3 of 4)

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.

3. This installation requires the installation of Pratt and Whitney PT6A-67A engines per STC SA02658LA or previously installed Pratt and Whitney PT6A-60A engines with previously installed HC-B4MP-3C hubs and M10476K or M10476NK blades.

4. The installed weight of the engine, propeller and generator will be limited to 724.7 lbs.

5. This installation requires the installation of at least a 42-AMP Hour Lead Acid Battery.

New Certification Basis:

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 Textron Aviation Inc B300/B300C series aircraft modified by installing two 400-AMP starter generators is as follows:

a. The type certification basis for Textron Aviation Inc B300/B300C series airplanes 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, June 30, 2020 include:

Regulations at the latest amendment 23-0 through 23-63:

14 CFR§ 23.1191(c)(e)(h)(1), 23.1322(b)(c)(d), 23.1351(a)(1)(2)(ii), 23.1351(b)(c),

23.1357(a)(b)(c).

Regulations at an intermediate amendment:

14 CFR§ 23.1309(a)(b)(e) Amdt 23-49, 23.1583(b)(1)(2)(m) Amdt 23-50, 23.1585(j) Amdt 23-50.

SA11298DS Date Reissued: April 24, 2023

Exemptions from 14CFR part 23:

None

Equivalent safety findings exist with respect to the following regulations:

None

Special conditions:

None

Special Federal Aviation Regulations:

None

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