Page 333 - (KU)01-75GAJ-1.5 - Change 1

INTRO

EP'S (KU)01-75GAJ-1.5 FIGURES

D. Fault Log............................................................................... Review
ACAWS
FWD AR PUMP START, HF SELCAL
POD DETECT RELAYS, RFL XFEED VLV OPEN/CLOSE
LPOD MASTER POWER, L POD TRAIL GROUND
L POD E-TRAIL/R-TEST, FUS TK FLCV PRI
L POD SPLY VLV OPEN/CLOSE TAKEOFF
L INTCON VLV OPEN/CLOSE
L POD HYDRAULIC POWER, L POD RED STATUS LIGHT FIRE/SMK
NORM AR POD DIM RELAY, ARN-139 TACAN
(End of Procedure)
PRES/OXY

1.10.6 AVIONIC SUBSYSTEM FAILURES ENG/PROP

Type I and Type II Bus Adapter Units and both Bus Interface Units
interface discrete and analog signals from various aircraft components FUEL
with the 1553 Data Bus. Type I BAUs typically provide control and
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and in the cargo compartment. Type II BAUs and the BIUs provide AAR
relay commands and status feedback for their respective subordinate
components. The TECU is similar to a Type II BAU.
SPEC NOT FOR FLIGHT ELEC
There are two categories of BAU/BIU failures: conventional failures and
data bus communication failures. Both are annunciated by the same
ACAWS. HYD

Conventional failure
FLT CTRL
‡ Occurs due to a power loss (e.g., a tripped ECB) or an internal
fault.
‡ Check hard circuit breaker for BIUs. GEAR
‡ Subordinate components are designed to assume a fail-safe
default position.
DOR/RMP
PERF Data bus communication failure

‡ Occurs when the BAU/BIU interface with the 1553 data bus JETTISON
fails.
‡ Components controlled by the BAUs/BIUs generally fail in their
last commanded state, with loss of control and indication also LANDING
occurring.

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type can result in partial or complete loss of control and fault indication
of subordinate components. This section will provide appropriate action
for either condition as well as information on added procedures and BAILOUT
potential system failures for avionic subsystem failures.

OPER (End of Procedure) FAULT LG

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