# STC SA4206NM-D

- Type: Supplemental type certificate
- Status: Historical, Surrendered
- Holder: Hollingsead International, United States
- Description: Installation of an additional tape reproducer and switching unit.
- Applied: November 20, 1991
- Status date: June 18, 2009
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 5, Part 21, Part 21, Part 21, Part 21, Part 21, Part 21
- Data sheets: [TCDS A20WE](https://openairdocs.org/tcds/A20WE)
- Certificate PDF: https://openairdocs.org/files/sha256/f8/8a/f88a04c761d3bec3bbb4cecb1a65060d7976e0098f366e56b6b55ec0f75a0162
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F0EA399729D8B7A0862575EC0067C069.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA4206NM-D

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 747-300 Series ([TCDS A20WE](https://openairdocs.org/tcds/A20WE))

## What the certificate says

This is OCR from the scanned FAA certificate. OCR can misread letters and numbers.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA4206NM-D Certificate This certificate issued to: Hollingsead International SURRENDERED 2226 Goodyear Avenue on 6-18-09 Ventura, California 93003 Certifies that the change in the type design for the following product with the limitations and conditions therefor as specified hereon meets the airworthiness requirement's of Part 25 of the Tederal Aviation Requlations.

Original Product Type Certificate Number A20WE Make: BOEING Model: 747-300 Description of Type Design Change: Installation of an additional Tape Reproducer and Switching Unit in accordance with Singapore Airlines overview drawing 5B-23-5120, revision "New" dated January 31, 1991, and Engineering Order N23-130 dated January 29, 1991, or later FAA approved revisions.

Limitations and Conditions: This approval should not be incorporated on any certificated product of this model on which other approved modifications are incorporated, unless it is determined that the interrelationship between this change and any of those previously incorporated modifications will not introduce any adverse effect upon the airworthiness of the certificated product. A copy of this STC must be included in the permanent records of the modified aircraft. No findings of compliance with FAR 25.853 were required for this approval. If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission.

Date of Application: November 20, 1991 Date of Issuance: March 11, 1992

TIMISTRAT Date Reissued: April 12, 1995; December 16, 1996;

April 1, 1998; August 1, 2005; May 7, 2007 Date Amended:

By Direction of the Administrator Calli K. Woo Manager, Technical & Administrative Support Staff, Los Angeles Aircraft Certification Office

TRANSFER ENDORSEMENT Transfer the ownership of the Supplemental Type Certificate Number to (Name of transferee) (Address of transfer) (Number and street) (City, State, and Zip code) from (Name of grantor) (Print or type)_ (Address of grantor) (Number and street) (Cry, State, and Zip code) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

## Every issue (3)

- June 18, 2009: Surrendered, Historical. [certificate](https://openairdocs.org/files/sha256/f8/8a/f88a04c761d3bec3bbb4cecb1a65060d7976e0098f366e56b6b55ec0f75a0162)
- May 7, 2007: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/ba/3b/ba3badb2f3d0c1e9aeb437bc3d339e9cd9448594ea9b5c69b5dd4e6c4275f5a5)
- August 1, 2005: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/d0/77/d0775a7d76192ae694b1ec17a0f4a0cddc6383cd546e50171586d84121cfc316)

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