(2)  
On AF, AT, GN, MD, VM airplanes, turn on LRRA system at appropriate height indicator.

 (3)  
Verify height indicator warning flag is out of view and that altitude pointer indicates between -3 and -11 feet.

 (4)  
On AF, AT, GN, MD, VM airplanes,
 turn off LRRA system, if required.

 (5)  
Perform LRRA system operational test (Adjustment/Test section, Chapter 34-33-( )).

 (6)  
Remove electrical power if no longer required (Ref 24-22-00).

 EFFECTIVITY

 

 ALL  10 Page 401  Aug 25/8434-33-04
 INERTIAL NAVIGATION SYSTEM - DESCRIPTION AND OPERATION______________________________________________________
 1.  General (Fig. 1)_______
 A. The inertial navigation system (INS) automatically determines the
 navigation and attitude data of the airplane to keep the airplane on a
 predetermined course. External information inputs to the INS include
 barometric altitude and true airspeed from the central air data computer
 (CADC) and on ATLAS airplanes AF 116-150, 152-199, LH 011-030, 051-070,
 082-099; AZ 221-299; MD 501-599; GN 601-699; AT 701-750; VM 751-799;
 less airplanes with PMS, distance data from the DME System. On airplanes
 with PMS, updated present position is received from the PMS.
 *[1]
 XA
 XA  NOTE: The DME distance data is available provided Carousel CIVA____
 XA  and modified ARINC 521 D or ARINC 568 DME's are installed.
 XA
 The INS
 does not require these data inputs but without them it will operate
 with degraded performance. The navigation data is displayed on flight
 instruments, allowing the flight crew to fly the airplane to the INS
 reference. The data is also supplied to the autopilot systems (Chapter
 22), allowing the airplane to be automatically flown along the computed
 course if the autopilot/flight director is operated in the INS NAV mode
 with either channel A, B or C engaged.
 B. On ALL ATLAS airplanes EXCEPT AF 116-150, 152-199; LH 011-030, 051-070,
 082-099; AZ 221-299; MD 501-599; GN 601-699; AT 701-750; and VM 751-799,
 Three Delco Carousel IV INS systems are installed in the airplane.
 On AF 116-150, 152-199; LH 011-030, 051-070, 082-099; AZ 221-299;
 MD 501-599; GN 601-699; AT 701-750; and VM 751-799,
 Three Delco Carousel IV-A INS systems are installed in the airplane.
 *[2]
 XA
 XA  NOTE: DELCO Carousel CIV on CIVA systems are interchangeable.____
 XA
 XA  NOTE: Mixing of CIV and CIVA is also possible, but CIVA____
 XA  advantages are lost (inertial-mixing, DME updating
 XA  possibility) when more than one CIV system is installed.
 XA
 C. Each INS system consists of a mode selector unit (MSU) a
 control/display unit (CDU), an inertial navigation unit (INU), and a
 battery unit (BU).
 (1) The control/display units for INS No. 1 and 2 are located on the
 forward control stand electronic panel. The CDU for INS No. 3 is
 located on the aft control stand electronic panel.
 (2) The mode selector units for all three systems are located on the
 pilots' overhead panel.
 (3) The three navigation units are located on a shelf (E2-6) in the
 main equipment center.

 EFFECTIVITY

 AIRPLANES WITH DELCO INS  CONFIG 1  ATG A Page 1  Apr 25/9734-41-00
INS NO. 3 MODEINS NO. 1 MODE INS NO. 2 MODESELECTOR UNITSELECTOR UNIT SELECTOR UNIT

PILOT'S LIGHTSHIELD  SEE  B  SEE  B  SEE  B 
SEE  A 
FLIGHT ENGINEER'S 
INSTRUMENT PANEL 
CAPTAIN'S INSTRUMENT PANEL  SEE  F 
SEE  C  D  G 
FLIGHT OFFICER'S 
E  1  INSTRUMENT PANEL 
H  2  3  SEE  C  D  G 
E  1 
I  3 
INS NO. 2 CONTROL/ 
DISPLAY UNIT 
SEE  D 
VOR/ILS  INS NO. 1 CONTROL/ DISPLAY UNIT  INS NO. 3 CONTROL/ DISPLAY UNIT 
SEE  D  SEE  D 

INS

FLIGHT INSTRUMENT RADIO/INS SWITCH SWITCHING RELAY PANEL (P73) A
NO. 1
NO. 3
NO. 2

FWD CENTER SHELF E2-6
MAIN EQUIPMENT
NAVIGATION UNIT INSTALLATION
1  AF 116-150,152-199 LH 011-130,051-070,082-099 INS BATTERY
　
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