Flashcards in APU Limitations Deck (22)
%N for amber font
%N for auto shutdown
107% or greater
EGT for amber font
within 33C of current max EGT
EGT for auto shutdown
%N for AVAIL
99.5% or 95% for > 2 seconds
Min batt voltage to start
25.5V, if less charge for 20 mins
When can you press APU START?
5 seconds after MASTER SW has been depressed and no LOW OIL LEVEL advisory
Max START EGT?
Max operating EGT?
When can you NOT check for the LOW OIL LEVEL during APU start?
After turning batteries to AUTO how much time do you have to start the APU?
After the batteries have been on for 35 minutes how much batt capacity is remaining?
Approx how long until APU available after start is engaged?
After AVAIL extinguishes during shutdown, how long do you leave batteries on for?
Max service ceiling
Max altitude to start on batteries only
Max altitude to power one AC pack
Max altitude to power two AC packs
APU starter limit
After 3 consec starts attempts allow 60 minutes for cool down
Max alt to start engines
Max alt for APU anti-ice
TRICK, you can't use APU for anti-ice