STC ST11076SC

FAA Form 8110-2 (8/13) Page 1

Number ST11076SC This certificate issued to Avox Systems, Inc.

225 Erie Street Lancaster, NY 14086

Part 25 of the Federal Aviation, Regulations.

Original Product – Type Certificate Number: A6WE Make: Boeing Model: DC-9-82, DC-9-83

Installation of Lavatory Oxygen System in accordance with Master Data List, K3568-MDL, Revision A, December 1, 2014.

Certification Basis:

Date of Application: July 17, 2014 Date Reissued: March 30, 2015 Date of Issuance: February 06, 2015 Date Amended:

Signature

Scott A. Horn Title Manager, Fort Worth Aircraft Certification Office Southwest Region

SUPPLEMENTAL TYPE CERTIFICATE, FAA FORM 8110-2 (CONTINUED)

To (Name of transferee)

(Address of transferee)

(Number and street)

(City, State, and ZIP Code)

From (Name of grantor)

(Address of grantor)

(Number and street)

(City, State, and ZIP Code)

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.

The Instructions for Continued Airworthiness, Document Number K3568-ICA, Revision New, dated October 28, 2014 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.

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 DC-9-82, DC-9-83 aircraft for the change is as follows:

a. The Type Certification basis for Boeing Model DC-9-82, DC-9-83 airplanes is shown on A6WE 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 17, 2014 is based upon Part 25, as amended by Amendment 25-138 and Part 26 as amended by Amendment 26-6. 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 25-138:

25.301(a), 25.303, 25.601, 25.1438(b), 25.1441(b)(c), 25.1443(c), 25.1445(a), 25.1449, 25.1453, 25.1529

Regulations at an intermediate amendment:

25.981(a.3)(d) Amendment 125, 25.1447(a)(c1)(c3) Amendment 41

Regulations at the amendment level in TCDS A6WE:

25.21(a.1), 25.29, 25.305(a)(b), 25.307(a), 25.365(e), 25.561, 25.603, 25.605, 25.607, 25.611, 25.613(a-c), 25.789, 25.1301, 25.1309(a)(b)(d)

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), (d)(5) (Amendment No. 26-0, through 26.6).

-END-

FAA Form 8110-2 (8/13) Page 3

Number ST11076SC Date of Issuance: February 06, 2015 Date of Reissuance: March 30, 2015