# STC SA1777GL

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Shadin Avionics, United States
- Description: Installation of a Shadin engine trend monitoring system.
- Applied: April 8, 1991
- Status date: June 8, 2006
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21, Part 23
- Data sheets: [TCDS A31CE](https://openairdocs.org/tcds/A31CE)
- Certificate PDF: https://openairdocs.org/files/sha256/92/ba/92ba2d676563e2170df5f2f7152fcc65db26290db5205cf5eec3290dfc241224
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A1089FC67FEC6079862575E50065E824.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1777GL

## ADs that name it (0)

None.

## Approved models (1)

- Raytheon Aircraft Company F90 ([TCDS A31CE](https://openairdocs.org/tcds/A31CE))

## 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 23 of the Federal Aviation Regulations. (See Type Certificate Data Sheet No. A31CE for complete certification basis.)

Installation of a Shadin Engine Trend Monitoring System per Shadin Report 3252, dated April 8, 1991, or later FAA approved revisions.

1) This approval should not be extended to other aircraft of this model 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 other previously approved modifications will introduce no adverse effect upon the airworthiness of that aircraft.

2) FAA Approved Airplane Flight Manual Supplement, dated July 23, 1992, or later FAA Approved revision is required.

3) 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.

Shadin Avionics 6831 Oxford Street St. Louis Park, MN 55426 A31CE Make : Beech Model : F90 Date of application : April 8, 1991

Date of issuance : July 23, 1992

Date reissued : June 8, 2006

( Signature) Charles L. Smalley Manager, Systems and Flight Test Branch Chicago Aircraft Certification Office

( Title)

## Every issue (1)

- June 8, 2006: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/92/ba/92ba2d676563e2170df5f2f7152fcc65db26290db5205cf5eec3290dfc241224)

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