ENGINES CBT Flashcards
ENGINES AND THRUST RATING
GE WITH 13,000LBS OF THRUST
WHAT IS ATTCS?
AUTOMATIC TAKEOFF THRUST CONTROL SYSTEM CONTROLLED BY THE FADEC
MUST BE ON FOR TAKEOFF
WHAT IS N1? WHAT IS IT USED FOR?
SPEED OF THE FAN AND LOW PRESSURE SECTION
IT IS THE PRIMARY GAUGE USED TO SET THRUST
WHAT DOES THE CYAN CHEVRON AND THE GREEN LINE ON N1 INDICATE?
CYAN CHEVRON INDICATES TOGA THRUST
GREEN LINE INDICATES MAX THRUST
WHAT IS ITT? HOW IS MAXIMUM INDICATED?
INTERSTAGE TURBINE TEMPERATURE, MAX IS INDICATED BY A RED TICK MARK.
WHAT IS MAX ITT FOR ENGINE START?
815 C
WHAT IS N2?
SPEED OF THE HIGH PRESSURE SECTIONS
HOW IS FUEL FLOW MEASURED?
POUNDS PER HOUR.
WHAT ARE THE OIL PRESSURE AND TEMPERATURE INDICATIONS? WHAT IS THE PRESSURE LIMITATION FOR START?
GREEN - NORMAL
AMBER - CAUTION
RED - LIMIT HAS BEEN EXCEEDED
OIL PRESSURE MUST BE GREATER THAN 0 WITHIN 10 SECONDS OF START
WHAT HAPPENS IF ENGINE VIBRATIONS ARE OUT OF TOLERANCE?
VIBRATION DISPLAY WILL TURN AMBER
WHAT IS THE REQUIRED BLEED PRESSURE FOR A CROSSBLEED START?
AT LEAST 40 PSI
DURING A CROSSBLEED START WHAT WILL HAPPEN IF THE THRUST LEVERS ARE MOVED TOO QUICKLY?
THE FADEC COULD SWAP FROM 10TH STAGE HP TO 6TH STAGE LP AUTOMATICALLY, WHICH COULD RESULT IN A HOT START.
WHAT SHOULD THRUST BE LIMITED TO ON THE GROUND?
40%N1
DO YOU NEED TO CHECK BLEED PRESSURE FOR APU STARTS?
NO
WHAT ARE THE START ATTEMPTS LIMITATIONS ON THE GROUND? IN FLIGHT?
1&2 90 SECONDS ON, 10 SECONDS OFF
3&5 90 SECONDS ON, 5 MINUTES OFF
120 SECONDS IN FLIGHT
WHAT DO ENGINE START/STOP SELECTORS INDICATE?
STOP: COMMANDS FADEC TO SHUTDOWN (THRUST LEVER MUST BE IN IDLE)
RUN: NORMAL OPERATION
START: INITIATES START PROCEDURE, FUEL INTRODUCED AT 20% N2, WITH ITT LESS THAN 120C (MUST BE SELECTED FOR 2 SEC.)
WHAT DO IGNITION SELECTOR KNOBS INDICATE?
OFF: DEACTIVATES IGNITION AND INHIBITS FUEL FLOW ON THE GROUND (FADEC IGNORES OFF IN FLIGHT)
ON: FADEC TURNS ON IGNITION WHEN ENGINE START ATTMEPT (7% N2 ONE IGNITER)/AUTO RE-LIGHT (BOTH IGNITERS)
OVRD:ENABLES FADEC TO ACTIVATE BOTH IGNITERS
HOW DO THE THRUST LEVERS FUNCTION?
DIGITALLY THROUGH THE FADEC
HOW DO THE THRUST REVERSERS WORK? HOW DO WE USE THEM?
BY DIRECTING BYPASS AIR SIDEWAYS AND SLIGHTLY FORWARD.
BY PULLING THE TRIGGERS ON THE THRUST LEVERS AND MOVING THEM TO REVERSE.
WHEN USING THE THRUST REVERSERS, WHAT INDICATION WILL YOU RECIEVE?
GREEN “REV” BELOW N1
