# STC SA4403NM

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Learjet Inc, United States
- Description: Installation of third attitude indicator that meets the requirements of FAR 121.305(j).
- Applied: December 15, 1981
- Status date: June 22, 1990
- Product: Aircraft, Small Airplane
- Certification basis: Part 21, Part 121
- Data sheets: [TCDS A10CE](https://openairdocs.org/tcds/A10CE)
- Certificate PDF: https://openairdocs.org/files/sha256/a4/47/a447ba788fb11cc335758c66c13a21f572882b3198c60fb07a404560b5dd24d1
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/70CA0A0F8B07170585256CC2000E3C43.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4403NM

## ADs that name it (0)

None.

## Approved models (22)

- Learjet Inc. 24 ([TCDS A10CE](https://openairdocs.org/tcds/A10CE))
- Learjet Inc. 24A ([TCDS A10CE](https://openairdocs.org/tcds/A10CE))
- Learjet Inc. 24B ([TCDS A10CE](https://openairdocs.org/tcds/A10CE))
- Learjet Inc. 24B-A ([TCDS A10CE](https://openairdocs.org/tcds/A10CE))
- Learjet Inc. 24C ([TCDS A10CE](https://openairdocs.org/tcds/A10CE))
- Learjet Inc. 24D ([TCDS A10CE](https://openairdocs.org/tcds/A10CE))
- Learjet Inc. 24D-A ([TCDS A10CE](https://openairdocs.org/tcds/A10CE))
- Learjet Inc. 24E ([TCDS A10CE](https://openairdocs.org/tcds/A10CE))
- Learjet Inc. 24F ([TCDS A10CE](https://openairdocs.org/tcds/A10CE))
- Learjet Inc. 24F-A ([TCDS A10CE](https://openairdocs.org/tcds/A10CE))
- Learjet Inc. 25 ([TCDS A10CE](https://openairdocs.org/tcds/A10CE))
- Learjet Inc. 25A ([TCDS A10CE](https://openairdocs.org/tcds/A10CE))
- Learjet Inc. 25B ([TCDS A10CE](https://openairdocs.org/tcds/A10CE))
- Learjet Inc. 25C ([TCDS A10CE](https://openairdocs.org/tcds/A10CE))
- 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.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number 5A4403NM This certificate issued to: Learjet INC.

8220 West Harry Street P. O. Box 7707 Wichita, KS 67277 Part 25 of thE ederal Aviation Regulalions. (For certification basis, see I.C. Data Sheet AlOCE) Original Product -Type Certificate Numben: A10CE Мил. 30. 286. 39, 351 Make: Learjet Model: 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, Description of Type Design Change: 25F, 28, 29, 35, 35A, 36, and 36A 24E, 24F, 24F-A, 25, 25A, 25B, 25C, 25D, Installation of third attitude indicator that meets the requirements of FAR 121.305(j) in accordance with FAA sealed Gates Learjet-Tucson Master Document List No. T100137 TUC, Revision B, dated February 15, 1982, or later FAA sealed revisions.

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 airplane.

Date of Application: December 15, 1981 Date of Issuance: February 22, 1982 Jule wissued: October 24, 1988;

June 22, 1990 Jate unended: Apr11 12, 1982 EDERAL AVIATION By Direction of the Administrator Ronald K. Ratkaeker (n Lawrence A. Hefion) Manager COMINISTRAT Wichita Aircraft Certification Office (Tille)

47.

## Every issue (1)

- June 22, 1990: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/a4/47/a447ba788fb11cc335758c66c13a21f572882b3198c60fb07a404560b5dd24d1)

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