Powerplant and APU Limitations Flashcards
Max TGT Engine Start
F100 - 740 deg C (max 2 sec)
F70 - 700 deg C (max 2 sec)
Max TGT during Relights
F100 and F70 - 780 deg C (max 2 sec)
Max Takeoff operating limits
N1
N2
TGT
N1 - 95.5%
N2 - 103.5%
TGT - F100 850 deg C (5 min)
- F70 - 800 deg C (5min)
( in case of engine failure after take off may be extended to 10 min)
Max Continuous operating limits
N1
N2
TGT
N1 - 95.5%
N2 - 100.5%
TGT - 795 deg C / F70 - 735 deg C
(All unrestricted)
Max Overspeed limits
N1
N2
N1. - 98.3%
N2. - 106.6%
(Both max 20 seconds)
Max Over temp limit
F100 870 deg C
F 70 820 deg C
(max 20 sec)
Minimum Low Idle
N2
N2. - 47.9%
Max Reverse Thrust
N1
N2
TGT
N1. - 95.5%
N2. - 99.2%
TGT - F100 850 deg C
F 70 800 deg C
(Max 60 seconds)
N1 restricted range
Avoid stabilised operation in the range 60 - 72 % N1 with a static aircraft and wind in excess of 15 kt.
N1 restricted range - reverse
57 - 75 % N1
Minimum oil pressure - takeoff
30 psi
Min oil pressure in flight
Variable
Low idle - 16 psi
78 % N2 - 25 psi
Min oil temp starting
Minus 50 deg C
Min oil temp before increasing power
Minus 30 deg C
Maximum oil temp
(Unrestricted)
105 deg C
Maximum transient oil temperature
120 deg C
(15 minute max)
Flex thrust take off shall not be used when:
(9 items)
- Icing conditions exist
- Contaminated runway
- Wind shear or inversion
- Lift dumpers inop.
- Any anti skid inop.
- Wing anti ice on
- Tail anti ice on
- No means established to periodically verify rated thrust
- Items affecting performance cause significant increase in crew workload.
Max APU load
Sea level
15000 ft
25000 ft
35000ft
Sea level - 100 %
15000 ft - 100%
25000 ft - 65 %
35000 ft - 30 %
Engine Starting
Engine Warm up
Max Fuel Temp (unrestricted)
95 deg C,
Max Fuel Temp (transient)
130 deg C. (15 minutes)
