# STC ST10278SC

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Learjet Inc., United States
- Description: Installation of a single Honeywell KGP-860 Class B Enhanced Ground Proximity Warning System (EGPWS) in accordance with the Master Document List BAS55010057, Rev. A, dated August 30, 2004, or later FAA approved revision.  FAA approved Airplane Flight Manual Supplement BAS55040030, Rev. NC, dated September 1, 2004, or later FAA approved revision is required.
- Applied: June 1, 2004
- Status date: September 1, 2004
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21, Part 25
- Data sheets: [TCDS A10CE](https://openairdocs.org/tcds/A10CE)
- Certificate PDF: https://openairdocs.org/files/sha256/64/01/6401a73dfcd2c5cacad94bd7839c0bd1b238b92749bb88ee92cf29e4c39c9823
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DA6495EB751E092F86256F81006E9507.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST10278SC

## ADs that name it (0)

None.

## Approved models (3)

- Learjet Inc. 55 ([TCDS A10CE](https://openairdocs.org/tcds/A10CE))
- Learjet Inc. 55B ([TCDS A10CE](https://openairdocs.org/tcds/A10CE))
- Learjet Inc. 55C ([TCDS A10CE](https://openairdocs.org/tcds/A10CE))

## 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.

8405 Lemmon Ave.

Dallas, TX 75209

Part 25 of the Federal Aviation Regulations.

Original Product Type Certificate Number : A10CE Make : Learjet Model : 55, 55B, 55C

Description of Type Design Change: Installation of a single Honeywell KGP-860 Class B Enhanced Ground Proximity Warning System (EGPWS) in accordance with the Master Document List BAS55010057, Rev. A, dated August 30, 2004, or later FAA approved revision. FAA approved Airplane Flight Manual Supplement BAS55040030, Rev. NC, dated September 1, 2004, or later FAA approved revision is required.

Limitations and Conditions: Compatibility of this design change with previously approved modifications must be determined by the installer. 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.

Date of application : June 1, 2004

Date of issuance : September 1, 2004 Date reissued :

( Signature) S. Frances Cox Manager, Special Certification Office Southwest Region

(Title)

FAA Form 8110-2-1(10-69) Page 2 of 2

Number ST10278SC Date of Issuance: September 1, 2004

Certification Basis:

Regulations that meet amendment 25-23

25.301, 25.303,25.561, 25.581, 25.611, 25.619, 25.1455

Regulations that meet amendment 25-38

25.1322,

Regulations that meet amendment 25-41

25.1309

Regulations that meet amendment 25-46

25.603, 25.605

Regulations that meet amendment 25-54

25.1529

Regulations that meet amendment 25-72

25.307, 25.341, 25.613, 25.625, 25.869, 25.1307, 25.1351, 25.1381

Regulations that meet amendment 25-87

25.365

Regulations that meet amendment 25-102

25.981

## Every issue (1)

- September 1, 2004: Issued, Current. [certificate](https://openairdocs.org/files/sha256/64/01/6401a73dfcd2c5cacad94bd7839c0bd1b238b92749bb88ee92cf29e4c39c9823)

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