# STC ST04685NY

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Lufthansa Technik AG, Germany
- Description: Installation of Riblets Film on Lower Fuselage
- Applied: October 21, 2021
- Status date: December 9, 2021
- Product: Aircraft, Large Airplane
- Certification basis: Part 21, Part 25
- Data sheets: [TCDS A20WE](https://openairdocs.org/tcds/A20WE)
- Certificate PDF: https://openairdocs.org/files/sha256/50/b1/50b1903e496410f6f4ad6659ed27efdc3cc84613bd696cf9208cd6f721ea3fc6
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/EAABCC4DDF16C5FC862587AA00644614.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST04685NY

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 747-400 Series ([TCDS A20WE](https://openairdocs.org/tcds/A20WE))

## 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 This certificate issued to:

**IMPORT ST04685NY**

**LUFTHANSA TECHNIK AG WEG BEIM JAEGER 193 22335 HAMBURG**

**GERMANY .**

Title 14 Code of Federal Regulations A20WE Make: Original Product Type Certificate Number:

The Boeing Company 747-400 Series

1. Installation of Riblets Film on Lower Fuselage must be in accordance with Lufthansa Technik Supplemental Type Definition Document STDD11-18/01M, Issue 02, Rev. 00, dated June 8, 2020, or later EASA approved revisions.

(See Description of Type Design Change Continued on Page 3 of 3) Limitations and Conditions:

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)

October 21, 2020 December 9, 2021 Date of Issuance: Date Amended:

Anthony E. Gallo Manager, International Validation Branch Compliance & Airworthiness Division Aircraft Certification Service

**IMPORT ST04685NY**

ST04685NY To (Name and address of transferee):

IMPORT ST04685NY Date of Issuance: December 9, 2021

Description of Type Design Change (continued):

2. Aircraft is to be maintained in accordance with Lufthansa Technik Instructions for Continued Airworthiness A-00-19/42-ICA, Issue 01, Rev. 04, dated April 15, 2020, or later EASA accepted revisions.

3. Aircraft is to be operated in accordance with Lufthansa Technik Airplane Flight Manual Supplement A-00-19/42-AFM, Issue 02, Rev. 00, dated September 5, 2019, or later EASA approved revisions.

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

3. This STC is applicable to all serial numbers for this Make-Model.

4. Riblets foils P/Ns R()-T1TF1-(xxxxx)P only applicable to B747 MSN 29871. Riblets film material T1TF2 will be applied to all other MSNs.

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

## Every issue (1)

- December 9, 2021: Issued, Current. [certificate](https://openairdocs.org/files/sha256/50/b1/50b1903e496410f6f4ad6659ed27efdc3cc84613bd696cf9208cd6f721ea3fc6)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.