Limits Flashcards
Engines are limited by what 5 things?
Ng
Np
TGT
Oil px
Oil temp
Starter cycle is defined by?
Initiation
Acceleration
Dropout
TGT MRP EDECUs
0-810, continuous, green
810-851, 30 min, yellow
851-878, 10 min for max pwr/limiter checks, red
878-903, 2.5 min, red
903-949, 12 seconds, red
949, max, red
Np
<96%, avoid, red
96% - 105%, continuous, green (yellow above 101%)
105% - 117%, 20 sec, yellow
117% - 120%, 12 sec, yellow
120% max, red
Avoid 20-40% and 60-75%
Nr
<96%, avoid, red
96-101%, continuous, green
101-120%, precautionary, yellow
120, max, red
123% max for FCF auto
127% overspeed latch
Dual engine TQ <80kias
0-120%, continuous, green
120-144%, 10 seconds, yellow
144%, max, red
Dual engine TQ > 80kias
+ note
0-106%, continuous, green
106-127%, 10 seconds, yellow
127%, max, red
Dual engine TQ limits apply when both engines are above 65%
Single Eng TQ
0-135%, continuous, green
135%-144%, 10 seconds, red
144%, max, red
Ng (sys config 15)
0-102.2%, continuous, green (yellow 98-102/ red above 102%)
102.2%-106%, 2.5 minutes, red
106-107%, 12 seconds, red
Max 107%
Transmission temp
-50-105 C, continuous, green
105-120 C, precautionary, yellow
120 C max red
Transmission Px
20 psi, minimum, red
20-30 psi, idle & transient, yellow
30-65 psi (45-60 psi in lvl flight), continuous, green
65-130 psi, precautionary, yellow
130 psi max
Engine Oil Temp
-50 to 135 C, continuous, green
135 to 150 C, 30 min, yellow
150 C max
Engine Oil Px
1 note
22 psi, minimum, red
22-26 psi, precautionary, yellow
26-100 psi, continuous, green
100-120 psi, precautionary, yellow
120 max
Idle range is 22-55 psi
Eng Starter Limits
<16 C
16-52 C
Engine Motor (ignition OFF)
<16 C
First 3 cycles -60 seconds
4th cycle- 30 minutes
16-52 C
1 cycle- 60 seconds
2nd cycle- 30 minutes
Motoring
2 min ON- 5 min OFF
2 min ON- 30 min OFF
(Times are cumulative within 5 minutes)
Acceptable APU use includes:
EP’s,
Single engine training
Practice autos
Powering ECS during extreme conditions