# STC ST04637NY

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: APTOZ EHF., Iceland
- Description: Installation of Navigation-Dependent Position Determining - DO-260B Transponder
- Applied: February 16, 2021
- Status date: May 27, 2025
- Product: Aircraft, Large Airplane
- Certification basis: Part 25
- Foreign approvals: EASA 10068972 R2
- Data sheets: [TCDS A2NM](https://openairdocs.org/tcds/A2NM)
- Certificate PDF: https://openairdocs.org/files/sha256/67/6e/676e95f41a16c692755bfc4334d4f4c0d30a7559a183dd1a3f96d05ee69d97f1
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID158803349320260220192814.0001
- DRS record last changed: February 20, 2026
- Page: https://openairdocs.org/stc/ST04637NY

## ADs that name it (0)

None.

## Approved models (3)

- The Boeing Company 757-200 Series ([TCDS A2NM](https://openairdocs.org/tcds/A2NM))
- The Boeing Company 757-200PF Series ([TCDS A2NM](https://openairdocs.org/tcds/A2NM))
- The Boeing Company 757-300 Series ([TCDS A2NM](https://openairdocs.org/tcds/A2NM))

## What the certificate says

Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record.

**IMPORT ST04637NY APTOZ EHF.**

**AKURGERDI 41 108 REYKJAVIK**

ICELAND Part 25 Title 14 Code of Federal Regulations A2NM The Boeing Company 757-200 Series, 757-200PF Series, 757-300 Series

1. Installation of Navigation-Dependent Position Determining - DO-260B Transponder upgrade of Configuration 1 (DO-260B Mode-S transponder with existing TSO-129a GNSS source) or Configuration 2 (DO-260B Mode-S transponder with a TSO-145c GNSS source) to meet the EASA/FAA 2020 Mandate, must be in accordance with lcelandair CRA-757-3450-046, Revision H, dated May 10, 2021, or later EASA approved revisions.

(See Description of Type Design Change Continued on Page 3 of 3)

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

(See Limitations and Conditions Continued on Page 3 of 3) February 16, 2021 May 12, 2021 John Yoo Manager, International Validation Branch Compliance & Airworthiness Division Aircraft Certification Service 3 for:

May 27, 2025

**IMPORT ST04637NY ST04637NY 3**

IMPORT ST04637NY Date Reissued: May 27, 2025 Description of Type Design Change (continued):

2. Aircraft is to be maintained in accordance with Icelandair Continued Airworthiness Instructions No. CAI-757-3450-046, Revision E, dated May 10, 2021 or later EASA accepted revisions. For aircraft S/N 29307, maintenance is required in accordance with Icelandair Continued Airworthiness Instructions No. CAI-757-3450-046-02, Revision B, dated May 10, 2021, or later EASA accepted revisions.

3. Aircraft operation must be in accordance with Icelandair AFM Supplement No.

AFM-757-3450-046, Revision B, dated March 10, 2021, or later EASA approved revisions.

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 STC is applicable to serial numbers for The Boeing Company, Model 757-200 Series, 757-200PF Series, and 757-300 Series aircraft as listed on Icelandair CRA-757-3450-046, Revision H, dated May 10, 2021.

4. Aircraft is to be maintained in accordance with "Airworthiness Limitations" section of Icelandair Continued Airworthiness Instructions No. CAI-757-3450-046, Revision E, dated May 10, 2021, or later EASA approved revisions. For aircraft S/N 29307, maintenance is required in accordance with "Airworthiness Limitations" section of Icelandair Continued Airworthiness Instructions No. CAI-757-3450-046-02, Revision B, dated May 10, 2021, or later EASA accepted revisions.

----------END---------- 3 3

## Every issue (2)

- May 27, 2025: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/67/6e/676e95f41a16c692755bfc4334d4f4c0d30a7559a183dd1a3f96d05ee69d97f1)
- May 12, 2021: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/64/e2/64e2d699cd863e0817106d1d58bcc60f807fd57f4805fdb0d887745732eb1dce)

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