# STC SA4399NM

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Learjet Inc, United States
- Description: Installation of high frequency radio communications system.
- Applied: December 9, 1981
- Status date: June 22, 1990
- Product: Aircraft, Small/Large Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A10CE](https://openairdocs.org/tcds/A10CE)
- Certificate PDF: https://openairdocs.org/files/sha256/ba/f1/baf1ddf63a7097638b55195581155c0587c82ad9dcd4f27e6e4a1002942dcd38
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C35EABFBD7D0C31985256CC2000E3C32.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA4399NM

## ADs that name it (0)

None.

## Approved models (8)

- Learjet Inc. 25D ([TCDS A10CE](https://openairdocs.org/tcds/A10CE))
- Learjet Inc. 25F ([TCDS A10CE](https://openairdocs.org/tcds/A10CE))
- Learjet Inc. 28 ([TCDS A10CE](https://openairdocs.org/tcds/A10CE))
- Learjet Inc. 29 ([TCDS A10CE](https://openairdocs.org/tcds/A10CE))
- Learjet Inc. 35 ([TCDS A10CE](https://openairdocs.org/tcds/A10CE))
- Learjet Inc. 35A (C-21A) ([TCDS A10CE](https://openairdocs.org/tcds/A10CE))
- Learjet Inc. 36 ([TCDS A10CE](https://openairdocs.org/tcds/A10CE))
- Learjet Inc. 36A ([TCDS A10CE](https://openairdocs.org/tcds/A10CE))

## What the certificate says

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

Hamiceo States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA4399NM This certificate issued to: LearJet InC.

8220 West Harry Street P. O. Box 7707 Wichita, KS 67277 Part 25 of thE ederal Aviation Regulations. (For certification basis, see T.C. Data Sheet A1OCE) Original Product - Type bertificate Numben: A10CE Make: Learjet Model: 25D, 25F, 28, 29, 35, 35A, 36, and 36A Descripline Design hange at Hate earjet Communications System T1143, dated February 3, 1982, or later approved revision, is required with this installation.

Limitations and Conditions: The approval of this change in type design applies basically to the above listed models only. This approval should not be extended to other specific airplanes of this model on which other previously approved modifications are incorporated unless it is determined that the interrelationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of that airpiane.

Date of Application: December 9, 1981 Jule missurd: October 25, 1988;

June 22, 1990 Date of Issuance: . February 8, 1982 Date Amended:

EDERAL AVIATION By Direction of the Administrator Ronald K. Ratchge fo Lawrence A. Herron, Manager OMINISTRATO Wichita Aircraft Certification Office (Title) 47 FAA FORM 8110-2 (10-68)

## Every issue (1)

- June 22, 1990: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/ba/f1/baf1ddf63a7097638b55195581155c0587c82ad9dcd4f27e6e4a1002942dcd38)

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