ADIRU RPE Removal Criteria
Figure 021
1EFF : 001-004, 1 34-14-00Page 69 1 1 Config-1 Aug 01/03 1 1 1CES 1 (b) Upper limit for removal criteria
-Flight duration < 1.5 FH: The upper limit of the grey band is fixed at 7.5 NM.
-1.5 FH < Flight duration < 10 FH: The upper limit of the grey band is fixed at 3T + 3.
-Flight duration > 10 FH: The upper limit of the grey band is fixed at 33 NM.
(3) Residual Ground Speed Error The residual ground speed for each IR is determined at the end of the flight when the aircraft has come to a complete stop.
(a)
Check of the residual ground speed can be made:
-
On the CAPT (IR1) and F/O (IR2) Navigation Displays (ND): The residual ground speed of the IR3 can be read on the CAPT ND by setting the ATT HDG selector switch to CAPT/3.
-
On the ADIRS CDU: . set the DATA DISPLAY selector switch to TK/GS . set the SYS DISPLAY selector switch to 1, 2, 3 . read the respective ground speed in the CDU display.
(b)
Compare the recorded ground speed values with the following limits:
-
if the residual ground speed error is 15 kts or greater after each of two consecutive flights, replace the ADIRU
-
if the residual ground speed error is 21 kts or greater at the end of any one flight, replace the ADIRU.
1EFF : 001-004, 1 34-14-00Page 70 1 1 Config-1 Aug 01/03 1 1 1CES 1 ATTITUDE, HEADING AND POSITION - DESCRIPTION AND OPERATION
__________________________________________________________
1. General_______
**ON A/C 005-049, 051-099, 101-105, 151-199,
The Inertial Reference (IR) portion of the Air Data/Inertial Reference Unit (ADIRU) provides main data sources which are precision attitude, magnetic heading references and navigation data to the aircraft avionics systems. Attitude, heading and navigation data are displayed on the Electronic Flight Instrument System (EFIS) displays (Primary Flight Display (PFD); Navigation Display (ND)) and on the Digital Distance Radio Magnetic Indicator (DDRMI) with recopies the heading data. The IR portion also provides data from the selected MMR and accurate GPIR hybrid position.
**ON A/C 106-149, 204-299, 301-399,
The Inertial Reference (IR) portion of the Air Data/Inertial Reference Unit (ADIRU) provides main data sources which are precision attitude, magnetic heading references and navigation data to the aircraft avionics systems. Attitude, heading and navigation data are displayed on the Electronic Flight Instrument System (EFIS) displays (Primary Flight Display (PFD); Navigation Display (ND)) and on the VOR/ADF/DME RMI which recopies the heading data. The IR portion also provides data from the selected MMR and accurate GPIR hybrid position.
**ON A/C 201-203,
The Inertial Reference (IR) portion of the Air Data/Inertial Reference Unit (ADIRU) provides main data sources which are precision attitude, magnetic heading references and navigation data to the aircraft avionics systems. Attitude, heading and navigation data are displayed on the Electronic Flight Instrument System (EFIS) displays (Primary Flight Display (PFD); Navigation Display (ND)) and on the VOR/ADF RMI which recopies the heading data. The IR portion also provides data from the selected MMR and accurate GPIR hybrid position.
R 1EFF : 005-049, 051-099, 101-149, 151-199, 1 34-14-00Page 1 1201-299, 301-399, 401-499, 1Config-3 Aug 01/05 1 1 1CES 1
R **ON A/C 401-499,
R R R R R R R R R The Inertial Reference (IR) portion of the Air Data/Inertial Reference Unit (ADIRU) provides main data sources which are precision attitude, magnetic heading references and navigation data to the aircraft avionics systems. Attitude, heading and navigation data are displayed on the Electronic Flight Instrument System (EFIS) displays (Primary Flight Display (PFD); Navigation Display (ND)) and on the Radio Magnetic Indicator (RMI) which recopies the heading data. The IR portion also provides data from the selected MMR and accurate GPIR hybrid position.
R **ON A/C 051-099, 106-149, 204-299, 301-399, 401-499,
2. System Description__________________
R **ON A/C 051-099, 106-149, 204-299, 301-399,
A. General The IR portion is a strapdown inertial system which provides a quality reference for attitude, heading (true and magnetic), angular rates and accelerations. The IR software also computes: - the inertial position - the ground velocities - the baro inertial vertical speed - the drift angle - the wind data - the flight path data.
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