# STC SA5670NM

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Shannon Engineering, United States
- Description: Installation of a 25-degree landing flap warning select switch.
- Applied: September 23, 1991
- Status date: March 31, 1992
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 4A25](https://openairdocs.org/tcds/4A25)
- Certificate PDF: https://openairdocs.org/files/sha256/eb/c4/ebc468df14a8666d4237e31726d3543488b3934e4bb7a81c53b697610d2584a8
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/47D0F16656CD471085256CC200122A97.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA5670NM

## ADs that name it (0)

None.

## Approved models (1)

- McDonnell Douglas Corporation DC-8-61 ([TCDS 4A25](https://openairdocs.org/tcds/4A25))

## 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 SA5670NM This certificate issued to: Shannon Engineering 7675 Perimeter Road South, Suite 200 Seattle, WA 98108 Certifies that the change in the type design for the flowing product with the limitations and conditions therefor as specified heren meets the aireenthiness requirement's of Purt 4b #the Civil Aviation Regulations:

Original Product - Type bertificate Number: 4825 Make: McDonnell Douglas Model: DC-8-61 Description of Type Design Change: Installation of a 25-degree landing flag warning select switch in accordance with Shannon Engineering Drawing List JS-MDL-14370 dated March 27, 1992, or later FAA approved revisions, This installation requires previous or concurrent installation of Supplemental Type Certificates SA2411SO and SA551ONM.

Limitations and Conditions: Approval of this change in type design applies specitically to the airplane models listed in this certificate. This approval should not be extended to other aircraft of these models on which other previously approved modifications are incorporated unless it is determined by the installer that the interrelationship between this change and any of those previously approved modifications will introduce no adverse effect upon the airworthiness of that aircraft. (See Continuation Sheet.)

March 31, 1992 Date Amended:

FEDERAL AVIATION By Direction of the Administrator Skille (Signature ) TOMINISTR PATION Assistant Manager, Seattle Aircraft Certification Office, ANM-101S (Tille)

47.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA5670NM A copy of this certificate shall be maintained as part of the permanent records for the modified aircraft.

FAA approved Shannon Engineering Airplane Flight Manual Supplement JS1434 dated March 31, 1992, or later FAA approved revisions, to the basic DC-8-61 Airplane Flight Manual, DAC-33161, is required as part of this approval.

The following data supersede those in the Model DC-8-61 Type Data Sheet 4A25, Section XV:

Maximum Landing Weight 252,000 1bs.

Maximum Zero Fuel Weight 234,000 lbs.

Maximum Start of Takeoff Weight 320,300 1bs.

- END - 47 PAGE 3 OF 3 PAGES

## Every issue (1)

- March 31, 1992: Issued, Current. [certificate](https://openairdocs.org/files/sha256/eb/c4/ebc468df14a8666d4237e31726d3543488b3934e4bb7a81c53b697610d2584a8)

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