# STC ST04752NY

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: LB Aircraft Engineering, United States
- Description: Replacement of Dual Analog Radio Altimeter Transceivers with Dual 5G Tolerant Collins Aerospace or Honeywell Digital Radio Altimeters Transceivers and Dual Shadin Digital-to-Analog Converters. S
- Applied: September 16, 2024
- Status date: December 24, 2025
- Product: Aircraft, Large Airplane
- Certification basis: Part 25
- Data sheets: [TCDS A16WE](https://openairdocs.org/tcds/A16WE), [TCDS A6WE](https://openairdocs.org/tcds/A6WE)
- Certificate PDF: https://openairdocs.org/files/sha256/0c/f8/0cf8df1e4bc41c35fa17b20b3bc8a9340250cc3f5caf470ebb3bfbd1014296a0
- Approved model list and other attachments: [ST04752NY_AML.pdf](https://openairdocs.org/files/sha256/66/29/6629c955f1f262b33a3df86b926d0e8b7d8396242216ef1190e55c9c135f7119)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID163769461820251231152737.0001
- DRS record last changed: December 31, 2025
- Page: https://openairdocs.org/stc/ST04752NY

## ADs that name it (0)

None.

## Approved models (9)

- The Boeing Company 737-300 Series ([TCDS A16WE](https://openairdocs.org/tcds/A16WE))
- The Boeing Company 737-400 Series ([TCDS A16WE](https://openairdocs.org/tcds/A16WE))
- The Boeing Company 737-500 Series ([TCDS A16WE](https://openairdocs.org/tcds/A16WE))
- The Boeing Company DC-9-81 (MD-81) ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- The Boeing Company DC-9-82 (MD-82) ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- The Boeing Company DC-9-83 (MD-83) ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- The Boeing Company DC-9-87 (MD-87) ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- The Boeing Company MD-88 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- The Boeing Company MD-90-30 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))

## 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.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number 

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Original Product 7\SH&HUWLILFDWH1XPEHU Make:

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Replacement of Dual Analog Radio Altimeter Transceivers with Dual 5G Tolerant Collins Aerospace or Honeywell Digital Radio Altimeters Transceivers and Dual Shadin Digital-to-Analog Converters. See attached FAA AML (AML25-AML-0170) for required data. Instructions for Continued Airworthiness (ICA) shall be made available to the operator at the time of installation and be incorporated into the operator’s maintenance program. Aircraft Flight Manual Supplement (AFMS) is required and must be carried during all flights.

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

(2) If the holder agrees to permit another person to use the certificate to alter the product, the holder must give the other person written evidence of that permission.

(3) This STC is applicable to all serial numbers for these applicable aircraft models.

9/16/24 7/16/25 ODA administrator, ODA-834634-NE 3

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number  (IIHFWLYH'DWH I Transferr Endorsementt Transfer the ownership of Supplemental Type Certificate Number:

Too (Name and address of transferee):

Date oI transfer:

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(Continuation Sheet) Number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ertification Basis:

Based on 14 CFR § 21.115 and § 21.101, and the FAA policy for design changes that are identified as not significant in FAA Order 8110.48, the certification basis for this modification is as follows:

1) The type certification basis for parts not changed or not affected by the change remain as specified in the applicable TCDS as noted on the attached FAA Approved Model List (AML) - AML25-AML-0170.

(2) The certification basis for parts changed or affected by the change since the reference application date, September 16, 2024, is based upon Title 14 CFR part 25 as listed on the TCDS as noted on the attached FAA Approved Model List (AML) AML25-AML-0170.

---------------------------------------------------- END -------------------------------------------------------- 33 07/16/25

### ST04752NY_AML.pdf

AML25-AML-0170 Rev A Page 1 of 6 FAA Approved Model List ST04752NY 7791 NW 46th Street, Suit e 421-425, Miami, FL 33166 Replacement of Dual Analog Radio Altimeter Transceivers with Dual 5G Tolerant Collins Aerospace or Honeywell Digital Radio Altimeters Transceivers and Dual Shadin Digital-to-Analog Converters.

Rev IR FA A Approved ______________________ Ken Farsi ODA administrator, ODA-834634-NE Aerospace Design & Compliance LLC Date: 24Dec2025 for Daniel J. Utterson

AML25-AML-0170 Rev A Page 2 of 6

STC NOTES:

The Collins Digital Radio Altimeter Transceiver LRA-900+ and the Honeywell Digital Radio Altimeter Transceiver ALA-52B comply with the immunity requirements for 5G interference.

For a Radio Altimeter Tolerant Airplane both Radio Altimeters need to be replaced per this STC.

REV PAGES DESCRIPTION OF REVISION DATE IR ALL Initial Release. 16Jul2025 A ALL Addition of DC-9, MD-88, MD-90 Series aircraft (Project ADC-0214).

24Dec2025

AML25-AML-0170 Rev A Page 3 of 6 Item Make Models TCDS Init ial Approval Amended Date 1 The Boeing Company 737-300 Series 737-400 Series 737-500 Series A16WE 16Jul2025 STC Prerequisite The existing Radio Altimeter antennas, part numbers S67-2002-18, S67-2002-28, LG81AJ01, PN19-1-1, and AD43011-02C, are compatible with the new Digital Radio Altimeter Transmitters.

This STC is applicable to aircraft fitted with existing Radio Altimeters shown below:

Rockwell Collins Type Part Number Qt y 860F-4 622-380-002 2 622-380-006 622-380-008 622-380-011 622-380-013 622-380-014 622-380-015 622-380-018 622-380-102 622-380-103 622-380-104 622-380-108 622-380-114 622-380-020 622-380-021

Honeywell Type Part Number Qt y ALA-51A 2067631-5151 2 2067631-5152 2067631-5153 2067631-5154

AML25-AML-0170 Rev A Page 4 of 6 Item Make Models TCDS Init ial Approval Amended Date 1 The Boeing Company 737-300 Series 737-400 Series 737-500 Series A16WE 16Jul2025 Cert Basis/Amendment 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 parts changed or affected by the change since the reference date of application, September 16, 2024, is based upon 14 CFR Part 25. Based on Order 8110.48, the certification basis for this modification was determined to be:

§25.301 (a)(b), Amdt 25-23 §25.305 (a)(b), Amdt 25-23 §25.341, Initial §25.601, Initial §25.605, Initial §25.611, Initial §25.625 (a), Initial §25.773 (a)(2), Amdt 25-46 §25.831 (c), Initial §25.1301 (a)(c)(d), Initial §25.1309 (a)(b)(c)(d)(g), Amdt 25-41 §25.1351 (a)(1), Amdt 25-72 §25.1357 (a)(b)(c)(d)(e), Initial §25.1431 (c), Amdt 25-113 §25.1529, Amdt. 25-54 §25.1581 (a)(2)(d), Amdt 25-72

§25.303, Amdt 25-23 §25.307 (a), Initial §25.561 (b)(c), Amdt 25-91 §25.603, Initial §25.609 (a), Initial §25.613 (a)(b)(c), Amdt 25-112 §25.771 (a)(c), Amdt 25-4 §25.789 (a), Amdt 25-46 §25.869 (a)(1)(4), Amdt 25-113 §25.1307 (c)(e), Amdt 25-46 §25.1322 (b)(d), Amdt 25-38 §25.1353 (a)(b)(d)(1)(2)(3), Amdt 25-113 §25.1381, Amdt 25-72 §25.1501 (a)(b), Amdt 25-42 §25.1541 (a)(b), Initial §25.1585 (a), Amdt 25-46 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 26 amendments, the holder of this STC must demonstrate compliance with the applicable sections. As of the issuance date of this STC, compliance has been found for the following regulations: 14 CFR §26.11(c), Amdt 26-0.

Equivalent Level of Safety Findings have been made for the following regulation(s):

§ 25.773(a)(2), Pilot Compartment View (documented in P&S ELOS Memo ODA-ADC-0170-SE-1).

Master Data List Revision/Date AML25-MDL-0170, Rev A, 16Jul2025, or later FAA Approved Revision Instructions for Continued Airworthiness Revision/Date AML25-ICA-0170, Rev A, 21Mar2025, or later FAA Accepted Revision Aircraft Flight Manual Supplement Revision/Date AML25-AFMS-0170, Rev IR, 16Jul2025, or later FAA Approved Revision

AML25-AML-0170 Rev A Page 5 of 6 Item Make Models TCDS Init ial Approval Amended Date 2 The Boeing Company DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD-83), DC-9-87 (MD-87), MD-88 & MD-90-30 A6WE 24Dec2025 STC Prerequisite The existing Radio Altimeter antennas, part numb ers AD43011-02C, are compatible with the new Digital Radio Altimeter Transmitters.

This STC is applicable to aircraft fitted with existing Radio Altimeters shown below:

Rockwell Collins Type Part Number Qt y 860F-4 622-3890-002 2 622-3890-006 622-3890-008 622-3890-011 622-3890-013 622-3890-014 622-3890-015 622-3890-018 622-3890-102 622-3890-103 622-3890-104 622-3890-108 622-3890-114 622-3890-020 622-3890-021

Thales Type Part Number Qt y ERT-530A 9599-607-14908 2 9599-607-14933 9599-607-14934

AML25-AML-0170 Rev A Page 6 of 6 Item Make Models TCDS Init ial Approval Amended Date 2 The Boeing Company DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD-83), DC-9-87 (MD-87), MD-88 & MD-90-30 A6WE 24Dec2025 Cert Basis/Amendment 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 parts changed or affected by the change since the reference date of application, September 4, 2025, is based upon 14 CFR Part 25. Based on Order 8110.48, the certification basis for this modification was determined to be:

§25.301 (a)(b), Amdt 25-23 §25.305 (a)(b), Amdt 25-54 §25.341, Initial §25.601, Initial §25.605(a), Amdt 25-46 §25.611, Amdt 25-23 §25.625 (a), Amdt 25-23 §25.773 (a)(2), Amdt 25-46 §25.869 (a)(4), Amdt 25-72 §25.1301 (a)(c)(d), Initial §25.1309 (a)(b)(c), Amdt 25-41 §25.1351 (a)(1), Amdt 25-41 §25.1357 (a)(b)(c)(d)(e), Initial §25.1431 (c), Initial §25.1529, Amdt. 25-54 §25.1581 (a)(2)(d), Amdt 25-42

§25.303, Amdt 25-23 §25.307 (a), Amdt 25-54 §25.561 (a)(b)(c), Amdt 25-64 §25.603, Amdt 25-46 §25.609 (a), Initial §25.613 (a)(b)(c), Amdt 25-112 §25.771 (a)(c), Amdt 25-4 §25.789 (a), Amdt 25-46

§25.1307 (c), Amdt 25-54 §25.1322 (b)(d), Amdt 25-38 §25.1353 (a)(b)(d)(1)(2)(3), Amdt 25-113 §25.1381, Initial §25.1501 (a)(b), Amdt 25-42 §25.1541 (a)(b), Initial §25.1585 (a), Amdt 25-46 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 26 amendments, the holder of this STC must demonstrate compliance with the applicable sections. As of the issuance date of this STC, compliance has been found for the following regulations: 14 CFR §26.11(c), Amdt 26-0.

Equivalent Level of Safety Findings have been made for the following regulation(s):

§ 25.773(a)(2), Pilot Compartment View (documented in P&S ELOS Memo ODA-ADC-0214-SE-1).

Master Data List Revision/Date AML25-MDL-0170, Rev B, 23Dec2025, or later FAA Approved Revision Instructions for Continued Airworthiness Revision/Date AML25-ICA-0214, Rev IR, 24Sep2025, or later FAA Accepted Revision Aircraft Flight Manual Supplement Revision/Date AML25-AFMS-0214, Rev IR, 23Dec2025, or later FAA Approved Revision

--------------------------------------------------------- END ---------------------------------------------------------

## Every issue (2)

- December 24, 2025: Amended, Current. [certificate](https://openairdocs.org/files/sha256/0c/f8/0cf8df1e4bc41c35fa17b20b3bc8a9340250cc3f5caf470ebb3bfbd1014296a0), [ST04752NY_AML.pdf](https://openairdocs.org/files/sha256/66/29/6629c955f1f262b33a3df86b926d0e8b7d8396242216ef1190e55c9c135f7119)
- July 16, 2025: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/0c/f8/0cf8df1e4bc41c35fa17b20b3bc8a9340250cc3f5caf470ebb3bfbd1014296a0), [ST04752NY_AML.pdf](https://openairdocs.org/files/sha256/74/7b/747bff40148ef006be51e1725ab0564df7429e3e77cb1c778c65164cbe97f4e4)

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