The graphic shows the different library tests, with their test numbers, in each section.
Groups
When the DFCS runs a test of a system, it groups all the tests from the library that it needs to do the system test. The group has a name and a number. The graphic gives two examples of groups. One is the current status test group (group 10) and the other is the autoflight test group (group 11).
When BITE does a test, it shows data about the test on the MCDU. The group test data will show on the MCDU as **Group name**Group number.library test number. For example, if BITE does the CDS test as part of the autopilot test group, the MCDU will show **AUTOPILOT TEST**11.25.
The tests in the group may be divided into these three categories:
- Autotest 
- Interactive 
- Surface. 

Autotest
Tests in this category do not need any inputs from the BITE operator and do not need hydraulic power. These tests can run very quickly. Interactive Tests in this category need inputs from the BITE operator. They may
need the operator to push a button or move a switch. The instruction
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DFCS BITE PAGES - BITE LIBRARY shows on the MCDU. These tests do not need hydraulic power. You can run these tests even if the autotests do not pass.
Surface
Tests in this category need hydraulic power. The tests may also need the operator to do specific tasks.
If the group test consists of tests in all three categories, the autotest occurs first, the interactive test occurs next and then the surface test.
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DFCS GROUND MAINTENANCE BITE LIBRARY TESTS
INTERFACE
1. AIR DATA INERTIAL REFERENCE UNIT (ADIRU)
4.
AUTOTHROTTLE (A/T)

5.
DISTANCE MEASURING EQUIPMENT (DME)

7. LOW RANGE RADIO ALTIMETER (LRRA)
10.
 FLIGHT CONTROL COMPUTER (FCC)

11.
 LATERAL NAVIGATION (LNAV)

15.
 CROSS CHANNEL BUS

16.
 MODE CONTROL PANEL (MCP) INTERFACE

18. FLIGHT MANAGEMENT COMPUTER (FMC)
21.
 ANALOG SENSORS

22.
 STALL MANAGEMENT YAW DAMPER COMPUTER (SMYDC)

23.
 VHF OMNIDIRECTIONAL RANGE (VOR)

24.
 INSTRUMENT LANDING SYSTEM (ILS)

25.
 COMMON DISPLAY SYSTEM (CDS)

26.
 MICROWAVE LANDING SYSTEM (MLS)

27.
 GPS LANDING SYSTEM (GLS)

SURFACE
30.
 ELEVATOR

31.
 AILERON

32.
 SPEED/STABILIZER TRIM

33.
 MACH TRIM

34.
 FLAPS

35.
 DUAL/STAB

MCP
50. MCP PUSHBUTTONS
ANNUNCIATOR
61. ALTITUDE ALERT
62. DISENGAGE WARNING FCC (INTERNAL)
70.
 DISCRETE INPUTS

71.
 FCC SELFTEST

51.
 MCP FLIGHT DIRECTOR (F/D) SWITCH

52.
 MCP CHANGEOVER (C/O) SWITCH

53.
 MCP BANK ANGLE LIMIT SWITCH

54.
 MCP SPEED KNOB

55.
 MCP ALTITUDE SELECT

56.
 MCP VERTICAL SPEED

57.
 MCP DISPLAYS

58.
 INTERLOCKS

59.
 MCP COURSE/HEADING

CURRENT STATUS - GROUP NUMBER 10  AUTOPILOT TEST - GROUP NUMBER 11 
LIBRARY  LIBRARY 
AUTOTEST TEST NUMBER  INTERACTIVE  TEST NUMBER SURFACE 

DISCRETE INPUTS  70 
ADIRU  1 
　
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