# STC ST09853DS

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: United Airlines, United States
- Description: Dual Radome Aerodynamic Validation
- Applied: January 30, 2026
- Status date: June 26, 2026
- Product: Aircraft, Large Airplane
- Certification basis: Part 25
- Data sheets: [TCDS A16WE](https://openairdocs.org/tcds/A16WE)
- Certificate PDF: https://openairdocs.org/files/sha256/aa/ca/aacafed6aa4ec9545e5d42966b7324d74a97f84879f02f528d60de41662a3fce
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID185306449220260629160819.0001
- DRS record last changed: June 29, 2026
- Page: https://openairdocs.org/stc/ST09853DS

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 737-800 Series ([TCDS A16WE](https://openairdocs.org/tcds/A16WE))

## 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.

ST09853DS United Airlines 4933 Wright Road Houston, TX 77032 Part 25 & 26 the Title 14, Code of Federal Regulations A16WE The Boeing Company 737-800 Series

(1) The installation should not be incorporated in any aircraft unless it is determined that the interrelationship between this installation and any previously approved configuration will not introduce any adverse effect upon the airworthiness of the aircraft.

(continued on page 3) 01/30/2026 06/26/2026 Raju Tumarada, ODA Administrator 3 ER4420R01952 Rev A, June 15, 2026. ODA project number: 98530. (1) Boeing 737-800 Dual Radome Aerodynamic Validation. There is no MDL for this project.

(2) Airplane Flight Manual Supplement, Document Number 4420R01962 Rev -, dated June 17, 2026, or later FAA approved revision. (continued on page 3)

ST09853DS 3

ST09853DS

(3) Supplemental Instructions for Continued Airworthiness, Document Number 4420R01958C Rev -, dated June 22, 2026 or later approved FAA revision. (4) No EWIS ICA is required for this modification.

(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) Concurrent installation of FAA STC (ST09945AC or ST12005SE) and ST00758DE is required for all aircraft modified by this STC.

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

14 CFR 25.251(b) Vibration and Buffeting (documented in P&S ELOS Memorandum 98530-T-25.251 Rev 1).

Certification Basis:

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

a. The type certification basis for parts not changed or not affected by the change is shown in TCDS A16WE.

b. The certification basis for parts changed or affected by this modification since the reference application date January 30, 2026 is based upon the type certification basis shown in TCDS A16WE with the following exceptions.

14 CFR Part Amdt 14 CFR Part Amdt

ST09853DS issued June 26, 2026.

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## Every issue (1)

- June 26, 2026: Issued, Current. [certificate](https://openairdocs.org/files/sha256/aa/ca/aacafed6aa4ec9545e5d42966b7324d74a97f84879f02f528d60de41662a3fce)

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