Universal Avionics eNews
 
Sign Up to Receive the Universal Avionics eNews
 
Share: 

Discussing ICAO Aircraft & Equipment Capabilities Codes

From the Flight Deck
Jan 10, 2017
By: Mike Michalski, Pilot Instructor - Customer Training

Recently, there have been numerous questions concerning the appropriate International Civil Aviation Organization (ICAO) equipment suffix codes to use with regard to Performance-Based Navigation (PBN) Area Navigation (RNAV) and Required Navigation Performance (RNP) specifications.

In this article, we will discuss these codes. The following recommendations will apply to the majority of FMS installations using Software Control Number (SCN) 601 and later. The tables below highlight PBN/RNAV and RNP specifications per pages 5-1-24 and 5-1-25 of the Aeronautical Information Manual (AIM).

Area Navigation

PBN RNAV Specifications
A1 RNAV 10 (RNP 10)
B1 RNAV 5 all permitted sensors
B2 RNAV 5 GNSS
B3 RNAV 5 DME/DME
B4 RNAV 5 VOR/DME
B5 RNAV 5 INS OR IRS
B6 RNAV 5 LORAN C
C1 RNAV 2 all permitted sensors
C2 RNAV 2 GNSS
C3 RNAV 2 DME/DME
C4 RNAV 2 DME/DME/IRU
D1 RNAV 1 all permitted sensors
D2 RNAV 1 GNSS
D3 RNAV 1 DME/DME
D4 RNAV 1 DME/DME/IRU

Please note:

  • A1 — If you have Federal Aviation Administration (FAA) approval, either so stated in the Aircraft Flight Manual Supplement (AFMS) or by FAA Letter of Approval (LOA).
  • B2 — For most installations. B2 does meet the European requirement for RNP Bravo.
  • B5 — For those aircraft that also have an Inertial System.
  • C2 — For most installations.
  • D2 — For most installations.

Required Navigation Performance

  RNP Specifications
L1 RNP 4
O1 Basic RNP 1 all permitted sensors
O2 Basic RNP 1 GNSS
O3 Basic RNP 1 DME/DME
O4 Basic RNP 1 DME/DME/IRU
S1 RNP APCH
S2 RNP APCH with BARO–VNAV
T1 RNP AR APCH with RF (special authorization required)
T2 RNP AR APCH without RF (special authorization required)

Please note:

  • L1 — Same requirements as for A1.
  • O2 — For most installations, but applies to European departure and arrival requirements.
  • S1 — Only for installations that do not provide vertical approach guidance. Most installations can provide vertical guidance.
  • S2 — For most installations. Note: RNP approach here does not refer to a North American RNAV (RNP) "Authorization Required" (AR) approach.
  • T1 or T2 — Only for operators who have authorization to do AR approaches. RF refers to the flight guidance system's ability to navigate the ARINC Precision Arc (RF) leg type which was first implemented in FMS SCN 801.

Additional Information

Codes not listed in the above tables are not applicable to most Universal Avionics installations. A typical domestic flight in the U.S. for a non-AR installation would use B2, C2, D2 and S2.

For more information, please contact Universal Avionics Support at:

Tel: (520) 573-7627 or (800) 595-5906

Email Customer Support

Leave a comment