Starter - Oil System - Fuel System - AC/Pressurization Flashcards
(48 cards)
What are the engine starter cranking limits?
1st and 2nd attempt
90 sec ON – 10 sec. OFF
3rd thru 5th attempt
90 sec ON – 5 min. OFF
What are the Dry Motoring limits?
1st attempt: 90 sec. ON – 5 min. OFF
2nd thru 5th attempt: 30 sec. ON – 5 min. OFF
What are the APU Starter limits?
No more than three start attempts in one hour,
2 minute delay required between start attempts.
Min Oil Temperature for start?
-40°C
Max Continuous Oil Temperature?
155°C
Max Permissible Oil Temperature?
163°C (15 minutes max)
Max Oil Consumption?
0.05 gallons/hr
Where do we check the oil quantity?
On the EICAS menu page
When should the Oil Capacity be checked?
3 minutes to 2 hours after shutdown
When should the Engine Oil level be replenished?
15 minutes to 2 hours after shutdown
Max refill without dry motoring?
2 quarts
How is the oil cooled?
Fuel/oil heat exchanger
What is the total quantity of the engine oil tanks?
7.2 quarts
How is the fuel moved from the center tank to the main tanks?
transfer ejectors
How is the fuel moved from the main tanks to the collector tanks?
scavenge ejectors
gravity line used as a backup
How is the fuel moved from the collector tanks to the engine driven high pressure fuel pump?
main ejectors
backed up by boost pumps
What is the function of the electric boost pumps?
To provide initial fuelmfor engine start and
to back-up the main ejectors
What is the flight deck indication of a high pressure fuel pump failure?
Engine flameout
What is the maximum fuel imbalance?
300 lbs for takeoff
800 lbs for all other phases
When will the fuel system automatically begin transferring fuel?
200 lb fuel imbalance
When are the boost pumps automatically energized?
Low pressure from the main ejectors
if the pumps are armed
Where is the high pressure fuel pump located?
N2 accessory gearbox
Where is bulk fuel temperature taken?
right main tank
What is the Minimum Bulk Fuel Temp for take-off (Jet A)?
-30°C
