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Note: (1) It is possible to enter the radial equivalent to the specified Crosstrack (XTK)
accuracy, that is the RNP multiplied by 1.2, the EPE being an estimated radial position
error.
WITH THE GPS PRIMARY FUNCTION
RNP requirements are met, provided GPS PRIMARY is available, for :
‐ RNP-1 en route
‐ RNP-0.5 in the terminal area, provided the AP or FD in NAV mode is used
‐ RNP-0.3 in approach, provided the AP or FD in NAV mode is used.
GENERAL
Applicable to: ,
The aircraft navigation system, required by regulation to fly within a Required Navigation
Performance (RNP) airspace, shall comply with RNAV functionality criteria and with navigation
position accuracy and integrity criteria.
When referring to RNP-X, the value of X is the navigation accuracy expressed in NM, which has to
be met with a probability of 95 %.
An RNP value can be associated with an airspace, a route, a SID, a STAR, a RNAV approach or an
RNAV missed approach procedure.
Depending of the RNP value, and on the airspace environment (ground radio navaid), different
navigation equipment may be necessary.
An operational approval from the airline’s national authorities may be necessary.
NAVIGATION SYSTEM CAPABILITY (FOR REFERENCE ONLY)
European BRNAV (RNP-5) and P-RNAV (RNP-1) capability meets the certification requirements
of JAA TGL2 and TGL10. Terminal and en-route RNAV operations comply with the certification
requirements of the FAA Advisory Circular 90-100.
RNP-10 capability in oceanic or remote areas complies with paragraph 12.b.(1) of FAA Notice
8400.12A or with paragraph 12.a. or 12.b.(5), if GPS is installed and is operative.
Navigation system with the GPS PRIMARY function (if GPS installed) meets the certification
requirements of FAA AC 20–130A and TSO C 129A in class C1 (for navigation system with
multiple sensor inputs including GPS).
A330/A340 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
SPECIAL OPERATIONS
RNP
A330/A340 FLEET PRO-SPO-51 P 3/8
FCOM 19 AUG 10
RNP CAPABILITY
In order to match a given RNP value, the FMS-estimated position accuracy (also called Estimated
Position Error) must be better than the RNP value. Obviously, this is dependent on the FMS
navigation-updating mode (GPS, DME/DME, VORDME, or IRS).
On the MCDU PROG page, the required and the estimated position accuracy are displayed, and
determine the HIGH/LOW accuracy indication (Refer to STLO-22_20_R-20-05 NAVIGATION).
The required accuracy can be a default value, which is either a function of the flight phase, a
navigation database procedure value, or a value manually-entered by the crew.
When flying in RNP environment, the crew can insert the appropriate RNP value in the
REQUIRED ACCUR field of the PROG page.
When HIGH is displayed, the RNP ‐ requirement is estimated to be fulfilled.
‐ When LOW is displayed, the RNP requirement is estimated not to be fulfilled. In this case :
• The crew crosscheck navigation with raw data, if available.
• If the crosscheck is negative, or if raw data is unavailable, the crew informs the ATC.
When leaving the RNP environment, the crew will clear the manually-entered required accuracy.
WITHOUT GPS PRIMARY FUNCTION
RNP accuracy criteria are met, provided radio navaid coverage supports it for :
‐ RNP-1 en route and in the terminal area, provided a required accuracy of 1 nm See (1) is
checked or manually entered in the MCDU.
‐ RNP-0.3 in approach, provided a required accuracy of 0.3 nm See (1) is checked or,
manually entered in the MCDU.
Note: (1) It is possible to enter the radial equivalent to the specified Crosstrack (XTK)
accuracy, that is the RNP multiplied by 1.2, the EPE being an estimated radial position
error.
WITH THE GPS PRIMARY FUNCTION
RNP requirements are met, provided GPS PRIMARY is available, for :
‐ RNP-1 en route
‐ RNP-0.5 in the terminal area, provided the AP or FD in NAV mode is used
‐ RNP-0.3 in approach, provided the AP or FD in NAV mode is used.
BRNAV IN EUROPEAN AIRSPACE
Applicable to: ALL
In this airspace, radio navaid coverage is assumed to support RNP-5 accuracy.
A330/A340 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
SPECIAL OPERATIONS
RNP
A330/A340 FLEET PRO-SPO-51 P 4/8
FCOM 19 AUG 10
The minimum required equipment to enter BRNAV airspace is :
‐ One RNAV system which means :
• One FMGC
• One MCDU
• One VOR or one GPS receiver for FM navigation update
• One DME or one GPS receiver for FM navigation update
• One IRS
‐ Flight Plan Data on two NDs.
PROCEDURES
When GPS PRIMARY is not available, periodically crosscheck the FM position with the navaid raw
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