TM 1–1520–238–T–2
2–81
Table 2–1.
Master Failure Symptom Index (cont)
Failure Symptom
Reference
MOC
FUEL BOOST SWITCH DOES NOT STAY ON
(PILOT FUEL PANEL: CROSSFEED SWITCH
SET TO AFT TNK AND BOOST SWITCH SET
TO ON)
TM 1–1520–238–T–7
FUEL CROSSFEED/
BOOST SYSTEM
FUEL BST CIRCUIT BREAKER (CB57) DOES
NOT STAY CLOSED (APU OPERATING)
TM 1–1520–238–T–5
PRESSURIZED AIR
SYSTEM
FUEL BST CIRCUIT BREAKER (CB57) DOES
NOT STAY CLOSED (CPG FUEL PANEL:
BOOST SWITCH SET TO BOOST)
TM 1–1520–238–T–7
FUEL CROSSFEED/
BOOST SYSTEM
FUEL BST CIRCUIT BREAKER (CB57) DOES
NOT STAY CLOSED (CPG FUEL PANEL: CPG
ORIDE SWITCH SET TO CPG)
TM 1–1520–238–T–7
FUEL QUANTITY
INDICATION/
TRANSFER
FUEL BST CIRCUIT BREAKER (CB57) DOES
NOT STAY CLOSED (PILOT APU FIRE TEST
PANEL: START/RUN/OFF SWITCH SET TO
RUN)
TM 1–1520–238–T–8
AUXILIARY POWER
UNIT
FUEL BST CIRCUIT BREAKER (CB57) DOES
NOT STAY CLOSED (PILOT ELEC PWR
PANEL: BATT/EXT PWR SWITCH SET TO EXT
PWR)
TM 1–1520–238–T–6
CIRCUIT
PROTECTION
SYSTEM (DC
ESSENTIAL BUS 2 –
PILOT STATION)
FUEL BST CIRCUIT BREAKER (CB57) DOES
NOT STAY CLOSED (PILOT FUEL PANEL:
BOOST SWITCH SET TO ON)
TM 1–1520–238–T–7
FUEL CROSSFEED/
BOOST SYSTEM
FUEL BST CIRCUIT BREAKER (CB57) DOES
NOT STAY CLOSED (PILOT FUEL PANEL:
CROSSFEED SWITCH SET TO AFT TNK AND
BOOST SWITCH SET TO ON)
TM 1–1520–238–T–7
FUEL CROSSFEED/
BOOST SYSTEM
FUEL BST CIRCUIT BREAKER (CB57) DOES
NOT STAY CLOSED (PILOT POWER
QUADRANT: ENGINES NO 1 AND NO 2 PWR
LEVERS MOVED TO LOCKOUT)
TM 1–1520–238–T–7
FUEL CROSSFEED/
BOOST SYSTEM
FUEL BYP ENG 1 INDICATOR IS LIGHTED BUT
FUEL FILTER IS NOT CLOGGED (ENGINE 1
OPERATING)
TM 1–1520–238–T–4
POWER PLANTS
(ENGINE 1)
