# STC SA1666GL

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Spectrum Aeromed LLC dba Spectrum Aeromed, United States
- Description: Install air ambulance conversion.
- Applied: March 26, 1990
- Status date: February 28, 2019
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 3, Part 21
- Data sheets: [TCDS A20SO](https://openairdocs.org/tcds/A20SO)
- Certificate PDF: https://openairdocs.org/files/sha256/50/51/50513fd2bfcfe3f3970a77c49851d7ec09932b2423d75189d0a33ffad3268722
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3484C82D89E731828625843E0063F5B9.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1666GL

## ADs that name it (0)

None.

## Approved models (4)

- Piper Aircraft Inc. PA-31 ([TCDS A20SO](https://openairdocs.org/tcds/A20SO))
- Piper Aircraft Inc. PA-31-300 ([TCDS A20SO](https://openairdocs.org/tcds/A20SO))
- Piper Aircraft Inc. PA-31-325 ([TCDS A20SO](https://openairdocs.org/tcds/A20SO))
- Piper Aircraft Inc. PA-31-350 ([TCDS A20SO](https://openairdocs.org/tcds/A20SO))

## 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 3 of the Civil Air R egulations. (See Type Certificate Data Sheet No. A20SO for complete certification basis)

Original Product --Type Certificate N umber :

Install air ambulance conversion in accordance with Spectrum Aeromed Inc. Master Drawing List 2002DL, Revision 2, dated April 11, 2007, or later FAA approved revisions.

1. FAA Approved Aircraft Flight Manual Supplement, 2002FMS, dated May 21, 2007, or later FAA approved revision is required.

2. FAA Accepted Instructions for Continued Airworthiness, Manual 2002MM, Revision 2, dated April 20, 2007, or later FAA accepted revision is required for this modification. 3. The installer must determine whether this design change is compatible with previously approved modifications. 4. If the holder agrees to permit another person to use this certificate to alter the product, the holder must give the other person written evidence of that permission.

This certificate and the supporting data which is the basis for appr oval shall remain in effect until surrendered, suspended, revoked or a termination date is otherwise established by the A dministrator of the F ederal A viation A dministration.

Spectrum Aeromed, LLC dba Spectrum Aeromed 1815 23rd Ave. North Fargo, ND 58102 A20SO M ake : Piper Aircraft, Inc.

M odel : PA-31; PA-31-300; PA-31-325; PA-31-350

Date of application : March 26, 1990

Date of issuance : November 25, 1991

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

February 28, 2019

Date amende d : May 30, 2007

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 (3)

- February 28, 2019: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/50/51/50513fd2bfcfe3f3970a77c49851d7ec09932b2423d75189d0a33ffad3268722)
- August 6, 2007: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/02/4e/024ef23a5ae042a84e88200ed5f1c5dd04fc96157e2af4ce960f4517ef305164)
- May 30, 2007: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/e2/67/e267a61192a5d3b0a40f2173c35e99ab15ca6b1a57883dbb7a9019a798ac87a9)

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From OpenAirDocs.org, an independent open copy of FAA and NTSB data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.