STC ST9094SC

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate This certificate issued to:

ST9094SC Honeywell International Inc.

1944 E Sky Harbor Circle N Phoenix, AZ 85034 .

the Federal Aviation Regulations A28NM Make: Original Product Type Certificate Number:

Airbus A318 Series, A319 Series, A320 Series and A321 Series Recore of Leibherr Main Heat Exchanger PN 754A0000-03, 754B0000-02, 754C0000-01 and 754D0000-01 in accordance with Honeywell LORI Sealed Drawing List SDL3990-1 Rev. A, dated 11 June 2021 or later FAA approved revision.

1) Compatibility of this modification with previously installed equipment must be determined by installer.

2) 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.

December 9, 2020 Date Reissued:

October 22, 2021 Date of Issuance: Date Amended:

June 29, 2021 By Direction of the Administrator Signature:

William S. Shealy ODA Administrator, ODA-602216-NM

ST9094SC

ST9094SC 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 this change is as follows:

a. The type certification basis for parts not changed or not affected by this change is shown on TCDS A28NM.

b. The certification basis for parts changed or affected by the change since the date of application, December 9, 2020, is determined to be:

Regulations at the latest amendment:

25.1301(a) Amendment 25-123

Regulations at an intermediate amendment:

None

Regulations at the amendment level on TCDS:

25.603 Amendment 25-46; 25.605 Amendment 25-46; 25.1438(b) Amendment 25-41

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