Limits Flashcards
TRT
EGT , Time , N1, N2, Oil T, Oil P
870-905 C max, 5 mins
102% N1
105% N2
5-160 C (160-175C max 10 min)
11-92 psi
Min/ Max Cont
EGT , Time , N1, N2, Oil T, Oil P
610-870 C
102% N1
105% N2
-10 - 160C
11-92 psi
Flt Idle
EGT , Time , N1, N2, Oil T, Oil P
Min 390C (RAF RTS)
30-70% N1
71-84 N2
-10 - 160C
Min 11psi
Ground idle
-
16-22% N1
54-62% N2
-50 - 160C
Min 11 psi
Starting
-50 - 160 C
Positive indication oil pressure
Monitor fuel flow < 680pph
Up to 10s to light otherwise cutoff
725 max EGT
Cold wx (sub -23 C -10F) up to 60s to light with jet A1
Voltages (DC)
With ac online: >24-29v, charging +0-9A
Battery power >24v
JFS start: 22V JFS battery + 19 V main to start or single battery + 22V
Navigate to loads table; sec 3/emerg/systems/elec/non crit/D.C. loads - by function
Hydraulics
Gear door open
Gear up
2400-3050 L & R engines running (problem if it’s below 2800 though)
1300 (1 application) - 3050 brake accumulator
1: 3.75-4.25 gear down doors open, 4-5 doors closed, 3-4 gear up.
Preload: L/R 2000, Brake 1000
Rudder low: 2100-2400
Rudder high: 2800-3050
Only check cw tank on ground if above X fuel?
Do not test CWT pumps below 3,500 lbs
CG Limits
Above 280k check chart
Worst case 322,500 26% - 30%
RAF RTS: not aft of 30%
Not fwd of 23% landing
Not fwd 21% AAR
Below 275k 18% - 33%
Below 245k 16%(TO) 18%(land) - 33%
aim 25%, (cruise 32-33% efficiency)
Fuel quantities
Total usable Max: 166,153 lbs
9.97
2.9 / 14.1 / 15.2 / 48.7 / 15.2 / 14.1 / 2.9
42.7
Density 6.7 lb/gallon
AAR fuel filling limits
Reserves and Mains full = 322,500
Reserves full, mains depleted, no less than <1,500 = 299,000
Reserves empty, mains full = 293,000
Reserves and mains empty = 240,000
Aft tank > 39,450 lbs STRUCTURAL FAILURE
[TC] max 15,000lb fwd
Fwd tank max 10k, manually cut off or could over fill and burst bag.
UK: request reduce 50-25 psi when fwd or aft 80% 7.8 / 33.7, 90% stop filling 8.9/38.0
AC Voltage limits
200V 400Hz 3 Phase / 115V single phase
Caution: 180-190V 380-395 Hz
Norm: 190-210V 395-405 Hz
Caution: 210-220V 405-420 Hz
Max EGT on start (before coming to IDLE)
725 C
N2 Flight Idle
71-84%
N1 Flight Idle
30-70%
EGT limits
TRT or 870-905C - 5 mins
906-930C - retard to control temp until next landing
>930C - precautionary shutdown
Engine over temp or speed
Airborne, Allowed to operate engine normally until next landing provided parameters are brought within limits. If maximum is exceeded, precautionary shutdown.
EGT 906-930C (retard)
N1 102.1- 105%
N2 105.1 - 106%
Use of TRT wrt EGT limitations
5 min limit is both Thrust rating and EGT.
ie. If below 905C but operating at TRT, still limited to 5 mins!
TRT is only for take off, once airborne, MCT is the guide (no specified limit) and EGT/N1/N2 become controlling limits
Rudder pressure after flaps are retracted
Low range: 2100-2400 psi
Flap actuated switch, Flaps < 5 down
High range: 2800-3050 psi
If stuck in high, speed below 230 KIAS check flap travel, CBs.
Gear extension/retraction
Max IAS/Mach with gear extended
270 KIAS / M0.78 above 30,000ft
UK RTS 300kts below 30,500ft
M0.78 above 30,500ft
(320 KIAS / M0.85)
Climb out, 30 Flap speeds:
15 AoB
30 AoB
F30-F20
Vco + 10
Vco + 20
Vco + 10
Climb out, 20 Flap speeds:
15 AoB
30 AoB
F20 - clean
Vco + 10
Vco + 30
Vco + 25
Cleaned up
15 AoB
30 AoB
Vco + 30 (clean up + 5)
Vco + 50
Max Cont N1 and N2
N1 102% (absolute overspeed 105%)
N2 105% (absolute overspeed 106%)
Engines at same N1
Normal EGT deviations?
40C
If greater, press engine monitor and flag to maintenance. Could be a sign of engine deterioration
Clean
Below _____ lbs Vno / Mno
Above _____lbs Vno / Mno
Vne
<275klbs 330 KIAS / M0.8
>275klbs 300 KIAS / M0.8
Tanker join (all GW) 330 KIAS / M0.8
Vne 350 KIAS / M0.85
Max GW with reserves and main tanks empty
240,000lbs
Reserve tank transfer limitations
GW below 293,000 lbs (RTS)
Tanks 1 / 4 below 10,000lbs
Reserve + outboard main <= inboard main (DFM advised)
Maximum zero fuel mass
195,000 lbs
G limits
Clean, GW < ______ lbs
Clean, GW > ______ lbs
Flaps extended
Clean GW < 274,000 lbs +0.5 - 2G
Clean GW > 274,000 lbs 0 - 1.5 G
Flaps all GW +0.5 - 1.5G
Practise 3 engine work max gross mass
225,000 lbs
