# STC ST623CH

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Spectrum Aeromed LLC dba Spectrum Aeromed, United States
- Description: Install air ambulance conversion.
- Applied: November 27, 1996
- Status date: February 28, 2019
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21, Part 25
- Data sheets: [TCDS A20WE](https://openairdocs.org/tcds/A20WE)
- Certificate PDF: https://openairdocs.org/files/sha256/be/cc/becc4648d105427dc9e4d408401e2299d422a6e87d740c2ff1ba742a4ff86fbd
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DD25C45AC44F736A8625843E0062CE5E.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/ST623CH

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 747SP 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.

Part 25 of the Federal Aviation R egulations. (See Type Certificate Data Sheet No. A20WE for complete certification basis)

Original Product --Type Certificate N umber :

Install air ambulance conversion in accordance with Spectrum Aeromed Inc. Drawing List Report 5100A, No Revision, dated September 13, 1996, or later FAA approved revisions.

1. FAA Approved Airplane Flight Manual Supplement dated February 7, 1997, or later FAA approved revision is required.

2. Supplemental Type Certificate ST257WI-D is required for this modification.

3. You cannot use descriptive data about this design change to duplicate other products. This approval is limited to only the installation made in Boeing Model 747SP-68 Serial No. 21652. This STC does not permit manufacturing of parts for multiple installations.

Spectrum Aeromed, LLC dba Spectrum Aeromed 1815 23rd Ave. North Fargo, ND 58102 A20WE M ake : Boeing M odel : 747SP-60 S/N 21652

Date of application : November 27, 1996

Date of issuance : February 13, 1997

Date reissued : August 6, 2007; October 23, 2008;

February 28, 2019

B y direction of the A dministrator Original Signed By:

Monica L. Nemecek

(Signature) Monica L. Nemecek Manager, Airframe & Administrative Section Chicago ACO Branch

(Title)

FAA FORM 8110-2-1(10-69) PAGE 2 of 2 PAGES

Number

## Every issue (2)

- February 28, 2019: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/be/cc/becc4648d105427dc9e4d408401e2299d422a6e87d740c2ff1ba742a4ff86fbd)
- August 6, 2007: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/6c/0d/6c0d21902b832de96f625e88ee1c30ef9afa70cf96f350f964dab3ad43e1a386)

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