# STC ST11051SC

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: VT DRB Aviation Consultants, United States
- Description: Upgrade of pilot and co-pilot electromechanical flight instruments (ADI and HSI) to Rogerson Kratos EFIS 520, electronic flight instrument system (EFIS) in accordance with Compliance Data List DL1769M00, Revision IR, dated December 20, 2011 or later FAA approved revision.  Airplane Flight Manual Supplement 9967-0062, Revision IR, dated December 20, 2011 or later FAA approved revision, and Instructions for Continued Airworthiness 1769R33C02, Revision A, dated August 1, 2011 or later FAA accepted revision must be made available to the operator at the time of installation.
- Applied: February 17, 2011
- Status date: March 19, 2018
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21, Part 25
- Data sheets: [TCDS A12EA](https://openairdocs.org/tcds/A12EA)
- Certificate PDF: https://openairdocs.org/files/sha256/26/57/2657d74ce3123bb29d1feb3b9695e003d478f65adf0df62b2200bde33b6eacc1
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C303189C8DF6C4018625826000458B11.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST11051SC

## ADs that name it (0)

None.

## Approved models (1)

- Gulfstream Aerospace Corporation G-1159 ([TCDS A12EA](https://openairdocs.org/tcds/A12EA))

## 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.

FAA Form 8110-2 (5/14) Page 1 of 3

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: ST11051SC This certificate issued to: VT DRB Aviation Consultants 9800 John Saunders Road San Antonio, TX 78216

Part _25 of the Federal Aviation Regulations.

Original Product – Type Certificate Number: Make: Gulfstream Aerospace Corporation Model: G-1159 A12EA

Upgrade of pilot and co-pilot electromechanical flight instruments (ADI and HIS) to Rogerson Kratos EFIS 520, electronic flight instrument system (EFIS), in accordance with “Compliance Data List,” document number DL1769M00, revision IR, dated December 20, 2011, or later FAA approved revision. “Airplane Flight Manual Supplement”, document number 1769R33C02, revision A, dated August 1, 2011, or later FAA approved revision must be made available to the operator at the time of installation.

1. The installer must determine whether this design change is compatible with previously approved modifications.

2. If the holder agrees to permit another person to use this certificate to alter a product, the holder must give the other person written evidence of that permission.

Date of Application: February 17, 2011 Date Reissued: March 19, 2018

Date of Issuance: December 20, 2011 Date Amended:

Signature

Title VT DRB Aviation Lead ODA Administrator ODA-831473-SW

FAA Form 8110-2 (5/14) Page 2 of 3

Transfer Endorsement Transfer the ownership of Supplemental Type Certificate Number: ST11051SC

To (Name and address of transferee)

From (Name and address of grantor)

FAA Form 8110-2 (5/14) Page 3 of 3

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: ST11051SC

Date Reissued: March 19, 2018

Certification Basis:

Based on 14 CFR §§21.115 and 21.101, and the FAA policy for significant changes in FAA Order 8110.48, the certification basis for the Gulfstream Aerospace Corporation G-1159 modified by installing Rogerson Kratos EFIS 520 instruments is as follows:

a. The type certification basis for Gulfstream Aerospace Corporation G-1159 airplanes is shown on TCDS A12EA for parts not changed or not affected by the change.

b. The certification basis for parts changed or affected by the change since the reference date of application, February 17, 2011, is based upon part 25 as amended by Amendment 25-0.

Further, the certification basis for this modification was determined to be:

Regulations at the latest amendment 25-0 through 25-132 14 CFR §25.23(b), 25.301(a)(b)(c), 25.303, 25.305(a)(b), 25.307(a), 25.321(a), 25.341(a), 25.561(a)(b),

25.603(a)(b)(c), 25.605(a), 25.609(a), 25.613(a)(b), 25.771(a), 25.773(a)(2), 25.777(a), 25.789(a),

25.981(a)(3)(b), 25.1303, 25.1307(c), 25.1316, 25.1317(d), 25.1321, 25.1322, 25.1329(i), 25.1331,

25.1333, 25.1351(a), 25.1381, 25.1431, 25.1501, 25.1519, 25.1523, 25.1529, 25.1541, 25.1543,

25.1555(a), 25.1581, 25.1583(h), 25.1585(a).

Regulations at an intermediate amendment 14 CFR §25.869(a)(4), 25.1301; 25.1309, 25.1353(a)(c), 25.1357(a)(c).

Regulations at the amendment level in TCDS A12EA None.

-------------- END -------------

## Every issue (2)

- March 19, 2018: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/26/57/2657d74ce3123bb29d1feb3b9695e003d478f65adf0df62b2200bde33b6eacc1)
- December 20, 2011: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/90/7e/907e86b417ae3f7636310eb53dd90580bdb4b0f40d14e715a410e4546936d97f)

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