# STC SA02456NY

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Northrop Grumman Corporation 
California Microwave Systems, United States
- Description: Upgrade of an existing Rockwell Collins TDR-94D Mode S Transponder system.
- Applied: August 8, 2007
- Status date: August 30, 2007
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21, Part 23
- Data sheets: [TCDS A24CE](https://openairdocs.org/tcds/A24CE)
- Certificate PDF: https://openairdocs.org/files/sha256/fd/91/fd91526a3479eadc13b9d1d392e89e1a48b930bb1567276e7f4a0f923e590496
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/4082C5C6590366A986257369004D633D.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA02456NY

## ADs that name it (0)

None.

## Approved models (1)

- Hawker Beechcraft Corporation B300 ([TCDS A24CE](https://openairdocs.org/tcds/A24CE))

## 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.

Number SA02456NY This certificate issued to

Part 23 of the Federal Aviation Regulations.

Northrop Grumman Corporation California Microwave Systems 18450 Showalter Road Hagerstown, MD 21742

Original Product -- Type Certificate Number: A24CE Make: Hawker Beechcraft Corporation Model: B300 Description of Type Design Change:

Upgrade of an existing Rockwell Collins TDR-94D Mode S Transponder system to comply with the European Elementary and Enhanced Surveillance requirements in accordance with Installation Drawing List 230101DL, Rev B, dated August 13, 2007.

1. Northrop Grumman Corp. Instructions for Continued Airworthiness, 230103ER, Revision C, dated August 23, 2007 is required for this installation.

2. Northrop Grumman Corp. Airplane Flight Manual Supplement, 230102ER, Revision A, FAA approved on August 30, 2007 is required for this installation.

3. You can not use descriptive data about this design change to duplicate other products. This approval is limited to only the installation made in Hawker Beechcraft Corporation, Model B300, Serial Number FL-91. This STC does not permit manufacturing of parts for multiple installations.

4. The aircraft must be equipped with a previously approved Rockwell Collins TCAS-94 system consisting of Dual Mode S TDR- 94D Transponders, CTL-92 Control, CTL-TCAS Control, and TTR-4000 Processor, TRE-920 antennas and Transponder Omni directional antennas.

5. The aircraft must be modified by STC ST3018DE-A (Air Data Modification) for RVSM operations. This modification installs an ADC-87A Air Data Computer that is required for elementary and Enhanced Surveillance upgrades.

6. The aircraft has to have been modified with a previously approved Honeywell LASEREF V Inertial Reference Unit.

Date of application: August 8, 2007

Date of issuance: August 30, 2007 Date reissued:

( Signature) Anthony Socias Manager New York Aircraft Certification Office

( Title)

## Every issue (1)

- August 30, 2007: Issued, Current. [certificate](https://openairdocs.org/files/sha256/fd/91/fd91526a3479eadc13b9d1d392e89e1a48b930bb1567276e7f4a0f923e590496)

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