STC ST11861AT

ST11861AT FedEx Express 3640 Hacks Cross Road, Building D, 2nd Floor Memphis, TN 38125 25 Federal Aviation Regulations * * *

1. FedEx Aircraft Flight Manual Supplement specified in AML No, ST11861AT, or a later FAA-approved revision, is required and must be carried in the aircraft during all flights.

(Limitations and Conditions continued on page 3 of 3) 2/26/21 12/12/24 for Manager, East Certification Branch 3 * See attached FAA Approved Model List (AML) No. ST11861AT, dated December 12, 2024, or later FAA approved revision, for a list of approved aircraft models.

Installation of a new Control Wheel Push-to-Talk (PTT) switch with three positions and latchable in accordance with the MDL shown in the attached AML No. ST11861AT.

ST11861AT 12/12/24 3

ST11861AT 12/12/24

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. Instructions for Continued Airworthiness (ICA), as specified in AML No, ST11861AT, or a later FAA-accepted revision, shall be made available to the operator at the time of installation.

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 FAA Approved Model List is as follows:

a. The type certification basis for all models is shown on the TCDS specified in AML No.

ST11861AT 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, February 26, 2021, is based upon part 25 as amended by amendment 25-117.

Based on 14 CFR §§21.115 and 21.101, and FAA policy for significant level changes in FAA Order 8100.48, the certification basis for this modification was determined to be:

Regulations at amendment level, 25-0 through 25-117:

14 CFR §§ 25.603(a)(b)(c); 25.771(a); 25.777(a); 25.853(a); 25.869(a)(4); 25.1301;

25.1307(d); 25.1309(a)(b)(d)(g); 25.1353(a); 25.1431(a)(c); ; 25.1529; 25.1581;

25.1585(a).

Regulations at a later amendment (as noted):

14 CFR §§ 25.1457(a)(c)(1)(2) (25-124).

14 CFR Part 26 Regulations Compliance has been found for the following regulations at the noted Amendment levels:

14 CFR §§ 26.11(c)(1)(d)(4) (26-0).

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