3. Perform BITE Trouble Shooting
A. Perform system initialize steps as listed on PDC CDU and provide requested responses thru CDU.
B. Refer to paragraphs 5 thru 25 for reference list of tests corresponding to test selected. Refer to paragraph 26 for BITE data readouts which may be displayed for added information.
NOTE: The approximate total times listed in par. 6 thru 25 include time to initialize and exit BITE. BITE initialization requires approximately 20 seconds for nonsurface and surface tests and 15 seconds to exit BITE from either test.
C. A failure during BITE is indicated by a TEST FAILED display immediately after the failed subtest. The operator may select diagnostics or push ENG to continue BITE until all subtests are completed. TEST FAILED message is then repeated and pressing ENG will select diagnostics. Diagnostic readout will provide LRU identification for failed steps.
NOTE: When a failure is indicated for any nonsurface test, BITE will not enter a surface test. In ground functional test only, nonsurface and surface tests can be bypassed individually allowing the operator the choice of single tests or a combination of tests.
NOTE: Surface test BITE failure for aileron or elevator may be due to faulty shear rivets in the actuator lever arm assemblies. Refer to actuator R/I, 22-11-251 or 22-11-261.
D. Replace component(s) as indicated and repeat BITE test for system replacement verification.
E. To exit BITE, page PDC CDU away from page 5-5 or select PDC mode switch to position other than STBY.
F. At the completion of trouble shooting, exit BITE, remove hydraulic power and remove electrical power if no longer required.
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4. BITE Test Group Summary Chart
APPROX TEST TIME, MINUTES DISPLAY TEST GROUP NO SURFACE SURFACE TEST PARA. REF
SYMPTOM/PIREP 1 -- -- No Test
GROUND FUNCT 2 17.0 7.6
VERIFICATION 3 -- -- No Test
AUTOPILOT 4 -- -- No Test
FLIGHT DIR 5 9.0 1.0 6
A/T INTERFACE 6 2.4 0 7
ALT ALERT 7 3.0 0 8
ENG INTLKS 8 2.4 0 9
APPROACH 9 8.5 5.9 10
STAB TRIM 10 1.0 2.6 11
PITCH A/P 11 -- -- No Test
ROLL A/P 12 -- -- No Test
ALTITUDE 13 3.5 2.3 12
VERT SPEED 14 3.4 2.6 13
SPEED/LVL CHG 15 3.0 2.6 14
PITCH CWS 16 1.7 2.3 15
HEADING 17 3.6 .8 16
VOR 18 4.6 .8 17
ROLL CWS 19 2.8 .8 18
LRU INTERFACE 20 -- -- No Test
RIGGING 21 19
MACH/AS 22 1.0 0 20
MCP INTERFACE 23 2.5 0 20
May 20/82 22-11-01 Page 105 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
4. BITE Test Group Summary Chart (Cont)
APPROX TEST TIME, MINUTES DISPLAY TEST GROUP NO SURFACE SURFACE TEST PARA. REF ADI 24 1.0 0 20 FCC INTERFACE 25 5.4 0 20 DADC, ALP VANE 26 .6 0 20 VG, LRRA, ACCEL 27 .6 0 20 HSI 28 1.2 0 20 VOR/ILS RCVR, DME 29 1.0 0 20 COMPASS 30 .8 0 20 FLT MODE ANN 31 1.5 0 20 MINI LAND 32 .3 5.2 21 FULL LAND 33 16.4 10.8 22 ALL PITCH 34 ----23 ALL ROLL 35 ----24 OMEGA 36 ---- 25
*[1] GROUND FUNCTIONAL TEST IN SYSTEM ADJUSTMENT/TEST
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5. BITE Test Library Chart LIBRARY TEST (REF) TITLE
1.
INITIAL STATE OF DISCRETE INPUTS
2.
ADI F/D AND VALID FLAG
3.
MASI BUG
4.
D/A CONVERTERS
5.
A/P CWS ENGAGE INTLKS
6.
A/P ENGAGE INTLKS
7.
A/P DISENGAGE AND WARNING (BA, LH)
8.
DME
9.
NAV RECEIVER INTERFACE
10.
SINGLE CHANNEL APP LOGIC
11.
DUAL APPROACH
12.
A/T INTERFACE
13.
ARINC 429 DADC SERIAL DATA
14.
ARINC 429 MCP SERIAL DATA
15.
RIGGING
16.
CROSS-CHANNEL XMIT/RCVR
17.
VG INTERFACES
18.
COMPASS INTERFACES
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