741 

Federal Aviation Administration, DOT 

§ 91.227 

(2) For operation of an aircraft that 

is not equipped with ADS–B Out, the 
request must be made at least 1 hour 
before the proposed operation. 

(h) The standards required in this 

section are incorporated by reference 
with the approval of the Director of the 
Office of the Federal Register under 5 
U.S.C. 552(a) and 1 CFR part 51. All ap-
proved materials are available for in-
spection at the FAA’s Office of Rule-
making (ARM–1), 800 Independence Av-
enue, SW., Washington, DC 20590 (tele-
phone 202–267–9677), or at the National 
Archives and Records Administration 
(NARA). For information on the avail-
ability of this material at NARA, call 
202–741–6030, or go to 

http:// 

www.archives.gov/federal

lregister/ 

code

loflfederallregulations/ 

ibr

llocations.html. This material is also 

available from the sources indicated in 
paragraphs (h)(1) and (h)(2) of this sec-
tion. 

(1) Copies of Technical Standard 

Order (TSO)–C166b, Extended Squitter 
Automatic Dependent Surveillance- 
Broadcast (ADS–B) and Traffic Infor-
mation Service-Broadcast (TIS–B) 
Equipment Operating on the Radio 
Frequency of 1090 Megahertz (MHz) 
(December 2, 2009) and TSO–C154c, Uni-
versal Access Transceiver (UAT) Auto-
matic Dependent Surveillance-Broad-
cast (ADS–B) Equipment Operating on 
the Frequency of 978 MHz (December 2, 
2009) may be obtained from the U.S. 
Department of Transportation, Subse-
quent Distribution Office, DOT Ware-
house M30, Ardmore East Business Cen-
ter, 3341 Q 75th Avenue, Landover, MD 
20785; telephone (301) 322–5377. Copies of 
TSO –C166B and TSO–C154c are also 
available on the FAA’s Web site, at 
http://www.faa.gov/aircraft/air

lcert/ 

design

lapprovals/tso/.  Select the link 

‘‘Search Technical Standard Orders.’’ 

(2) Copies of Section 2, Equipment 

Performance Requirements and Test 
Procedures, of RTCA DO–260B, Min-
imum Operational Performance Stand-
ards for 1090 MHz Extended Squitter 
Automatic Dependent Surveillance- 
Broadcast (ADS–B) and Traffic Infor-
mation Services-Broadcast (TIS–B), 
December 2, 2009 (referenced in TSO– 
C166b) and Section 2, Equipment Per-
formance Requirements and Test Pro-
cedures, of RTCA DO–282B, Minimum 

Operational Performance Standards for 
Universal Access Transceiver (UAT) 
Automatic Dependent Surveillance- 
Broadcast (ADS–B), December 2, 2009 
(referenced in TSO C–154c) may be ob-
tained from RTCA, Inc., 1828 L Street, 
NW., Suite 805, Washington, DC 20036– 
5133, telephone 202–833–9339. Copies of 
RTCA DO–260B and RTCA DO–282B are 
also available on RTCA Inc.’s Web site, 
at 

http://www.rtca.org/onlinecart/ 

allproducts.cfm. 

[Doc. No. FAA–2007–29305, 75 FR 30193, May 
28, 2010; Amdt. 91–314–A, 75 FR 37712, June 30, 
2010; Amdt. 91–316, 75 FR 37712, June 30, 2010] 

§ 91.227

Automatic Dependent Surveil-

lance-Broadcast (ADS–B) Out equip-
ment performance requirements. 

(a) 

Definitions.  For the purposes of 

this section: 

ADS–B Out is a function of an air-

craft’s onboard avionics that periodi-
cally broadcasts the aircraft’s state 
vector (3-dimensional position and 3-di-
mensional velocity) and other required 
information as described in this sec-
tion. 

Navigation Accuracy Category for Posi-

tion  (NAC

P

) specifies the accuracy of a 

reported aircraft’s position, as defined 
in TSO–C166b and TSO–C154c. 

Navigation Accuracy Category for Ve-

locity (NAC

V

) specifies the accuracy of a 

reported aircraft’s velocity, as defined 
in TSO–C166b and TSO–C154c. 

Navigation Integrity Category (NIC) 

specifies an integrity containment ra-
dius around an aircraft’s reported posi-
tion, as defined in TSO–C166b and TSO– 
C154c. 

Position Source refers to the equip-

ment installed onboard an aircraft used 
to process and provide aircraft position 
(for example, latitude, longitude, and 
velocity) information. 

Source Integrity Level (SIL) indicates 

the probability of the reported hori-
zontal position exceeding the contain-
ment radius defined by the NIC on a 
per sample or per hour basis, as defined 
in TSO–C166b and TSO–C154c. 

System Design Assurance (SDA) indi-

cates the probability of an aircraft 
malfunction causing false or mis-
leading information to be transmitted, 
as defined in TSO–C166b and TSO– 
C154c. 

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