STC ST04752NY

Supplemental type certificate · LB Aircraft Engineering

Holder
LB Aircraft Engineering · United States
Status
Current · Amended
Status date
December 24, 2025
Applied
September 16, 2024
Product
Aircraft · Large Airplane
Certification basis
Part 25

From FAA DRS, with our copy of the certificate PDF. DRS record last changed December 31, 2025.

What it approves

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

What the certificate says

From the PDF’s text layer, without the form’s printed wording. Layout and order may 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

ADs that name this STC · 0

An AD can apply because an STC is installed, or mention one in its text.

No AD in this release names this STC

Approved models · 9

MakeModelData sheet
The Boeing Company737-300 SeriesA16WE
The Boeing Company737-400 SeriesA16WE
The Boeing Company737-500 SeriesA16WE
The Boeing CompanyDC-9-81 (MD-81)A6WE
The Boeing CompanyDC-9-82 (MD-82)A6WE
The Boeing CompanyDC-9-83 (MD-83)A6WE
The Boeing CompanyDC-9-87 (MD-87)A6WE
The Boeing CompanyMD-88A6WE
The Boeing CompanyMD-90-30A6WE

Every issue · 2

DRS keeps each issue of an STC as its own record, with its own certificate and attachments.

DateStatusFiles
December 24, 2025Amended, currentCertificateApproved model list
July 16, 2025Issued, earlier issueCertificateApproved model list