Notice of Availability of Draft Technical Standard Order (TSO)-C166b for Extended Squitter Automatic Dependent Surveillance-Broadcast and Traffic Information Service-Broadcast Equipment Operating on the Radio Frequency of 1090 Megahertz (MHz)

---
identifier: "/us/fr/E9-21953"
source: "fr"
legal_status: "authoritative_unofficial"
title: "Notice of Availability of Draft Technical Standard Order (TSO)-C166b for Extended Squitter Automatic Dependent Surveillance-Broadcast and Traffic Information Service-Broadcast Equipment Operating on the Radio Frequency of 1090 Megahertz (MHz)"
title_number: 0
title_name: "Federal Register"
section_number: "E9-21953"
section_name: "Notice of Availability of Draft Technical Standard Order (TSO)-C166b for Extended Squitter Automatic Dependent Surveillance-Broadcast and Traffic Information Service-Broadcast Equipment Operating on the Radio Frequency of 1090 Megahertz (MHz)"
positive_law: false
currency: "2009-09-11"
last_updated: "2009-09-11"
format_version: "1.1.0"
generator: "[email protected]"
agency: "Transportation Department"
document_number: "E9-21953"
document_type: "notice"
publication_date: "2009-09-11"
agencies:
  - "Transportation Department"
  - "Federal Aviation Administration"
fr_citation: "74 FR 46831"
fr_volume: 74
comments_close_date: "2009-10-09"
fr_action: "Notice of availability and request for comment."
---


#  Notice of Availability of Draft Technical Standard Order (TSO)-C166b for Extended Squitter Automatic Dependent Surveillance-Broadcast and Traffic Information Service-Broadcast Equipment Operating on the Radio Frequency of 1090 Megahertz (MHz)

**AGENCY:**

Federal Aviation Administration (FAA), Department of Transportation.

**ACTION:**

Notice of availability and request for comment.

**SUMMARY:**

The FAA is announcing the availability of and requesting comment on proposed TSO-C166b. The Avionic Systems Branch of the Aircraft Engineering Division, Aircraft Certification Service, FAA has presented a proposed revision of existing TSO-C166a. RTCA, Inc. Special Committee (SC)-186 is revising RTCA Document DO-260A, Minimum Operational Performance Standards for 1090 MHz Extended Squitter Automatic Dependent Surveillance-Broadcast (ADS-B) and Traffic Information-Broadcast (TIS-B), which will become the Minimum Performance Standard (MPS) for the proposed TSO-166b. Proposed TSO-C166b can be found at *http://www.faa.gov/aircraft/draft_docs/.* Comments may be filed electronically following instructions on the webpage. Comments may also be filed using the addresses provided below.

**DATES:**

Comments must be received no later than October 9, 2009.

**ADDRESSES:**

Comments may be submitted by the above deadline to Mr. Chip Bulger, AIR-130, Orville Wright Bldg. (FOB10A), 800 Independence Avenue, SW., Washington, DC 20591; facsimile: 202-385-4651.

**FOR FURTHER INFORMATION CONTACT:**

Mr. Chip Bulger, Avionics Systems Branch, Aircraft Engineering Division, Aircraft Certification Service, Federal Aviation Administration, 470 L'Enfant Plaza, SW., Washington, DC 20591; telephone 202-385-4882; *[email protected].*

Issued in Washington, DC on September 8, 2009.

David W. Hempe,

Manager, Aircraft Engineering Division.