STC ST10490SC

FAA Form 8110-2-1(10-69) Page 1 of 4 Number ST10490SC

This Certificate issued to

Part 25 of the Federal Aviation Regulations.

Description of Type Design Change: Removal of one row of tourist class seats in accordance with Master Data List, F1997-MDL, Revision B, dated February 04, 2013, or later ODA-700094-SW approved revision.

Limitations and Conditions: This approval should not be incorporated in any aircraft of this specific model until compatibility of this modification with previously approved modifications has been determined by the installer. If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission.

(Limitations and Conditions continued on page 3 of 4)

This certificate and the supporting data, which is the basis for approval, shall remain in effect until surrendered, suspended, revoked or a termination date is otherwise established by the Administrator of the Federal Aviation Administration.

American Airlines, Inc.

3900 N. Mingo Road Engineering Dept., MD 208 Tulsa, Oklahoma 74116 A2NM Make: Boeing Model: 757-200 Series Date of application : April 23, 2012

Date of issuance : June 22, 2012

Date amended : February 11, 2013

( Signature)

C.E. Williams ODA-700094-SW Administrator

( Title)

FAA Form 8110-2-1(10-69) Page 3 of 4 (Continuation Sheet)

Number ST10490SC

The Instructions for Continued Airworthiness, Document Number F1997-ICA, Revision C, dated January 10, 2013 or later FAA AEG accepted revision shall be made available to the operator at the time of installation. The aircraft shall be maintained in accordance with the Instructions for Continued Airworthiness.

A revised EWIS ICA is not required for this STC.

This modification requires previous or concurrent incorporation of STC Number ST09476SC, Amended April 9, 2008, with Master Data/Drawing List 908019, Rev M or later approved revision.

This modification requires previous or concurrent incorporation of Weber Service Bulletin number 876154.

This modification requires previous or concurrent incorporation of one of the following STCs:

SA3974SW-D, ST10480SC-D or ST10486SC-D

Certification Basis:

Based on 14 CFR 21.115 and 21.101, and the FAA policy for non-significant changes in FAA Order 8110.48, the certification basis for the Boeing Model 757-200 series aircraft for the change is as follows:

a. The Type Certification basis for Boeing Model 757-200 series airplanes is shown on TCDS A2NM 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, April 23, 2012 is based upon Part 25, as amended by Amendment 25-136 and Part 26 as amended by Amendment 26-5. Based on 14 CFR 21.115 and 21.101, and the FAA policy for non significant changes in FAA Order 8110.48, the certification basis for this modification was determined to be:

Regulations at the latest amendment 25-0 through 25-136

25.301(a), 25.303, 25.601, 25.619, 25.791(a),(b),(e), 25.815, 25.817, 25.1529, 25.1541

Regulations at an intermediate amendment

25.785, (a-c),(f)(1),(f)(3),(h-k) Amendment 72, 25.813(a),(b),(c)(2) Amendment 76, 25.853(a),(c),(d) Amendment 83, 25.869(a)(4) Amendment 72, 25.981(a)(3),(b) Amendment 102

Regulations at the amendment level in TCDS A2NM

25.21(a)(1), 25.29, 25.305 (a),(b), 25.307(a), 25.365(e-g), 25.561, 25.603, 25.605, 25.611, 25.613, 25.625,

25.789, 25.803(c), 25.1301, 25.1309(a),(b),(d-g), 25.1351(a), 25.1353(b), 25.1411(f), 25.1415(b)(1),(e),

25.1447(a),(c)(1), 25.1561(b-c) (Certification Basis continued on page 4 of 4)

FAA Form 8110-2-1(10-69) Page 4 of 4 (Continuation Sheet)

Number ST10490SC

Certification Basis (continued):

Equivalent safety finding exists with respect to the following regulation: 25.813(c)(1) Emergency Exit Access

14 CFR Part 26 regulations Based on 14 CFR §21.101(g), applicable provisions of 14 CFR part 26 are included in the certification basis.

For any future 14 CFR part 26 amendments, the holder of this STC must demonstrate compliance with the applicable sections. As of the issuance of this STC, compliance has been found for the following regulations 14 CFR § 26.11(c), (Amendment No. 26-0, through 26-5).

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