System limits Flashcards
(51 cards)
Engine oil pressure limits
minimum pressure for NG at ground idle - 5 PSI
Minimum pressure for NG between 80% and 95% - 32 PSI
Minimum pressure for NG equal or greater than 95% - 50 PSI
Normal operation - 35 to 90 PSI
Maximum for contigency power - 110 PSI
Maximum for cold weather starts - 150 PSI
Engine oil temp limits
Maximum - 149*
ENG1(2) OIL HOT displayed over 149*
Engine transmission oil temp limits
Maximum - 140*
ENG1(2) XMSN warning appears at 190*
Transmission oil temp limits
Maximum - 140*
all 140*
Transmission oil pressure limits
Minimum at ground idle - 7 PSI
Minimum at 100% NR - 20 PSI
Normal operation - 20-90 PSI
red when trnsmission oil pressure is less than 7 PSI with NR equal to or greater than 25%
XMSN PRESS HI when greater than 90 PSI
Flight control hydraulic pressure
Low limit - 2500 PSI
Normal - 2500-3200 PSI
High limit - 3200 PSI
Hydraulic system temperature
Red/White max - 120*C
Yellow/White- 95*-120*C
Utility system hydraulic pressure
Low limit - 2500 PSI
Normal - 2500-3500 PSI
High limit - 3500 PSI
Rotor limitations
Minimum transient power-on - 91%
Transient - 91-97%
Normal - 97-101%
Transient - 101-106%
Max transient power-on - 106%
Maximum during autorotation - 108%
Maximum transient - 111%
No write-up required between 108-111.5% NR
Rotor limit colors
less than 91% - Red
91% to 97% - Yellow
97% to 101% - Green
101% to 106% - Yellow
above 106% - Red
Cruise guide indicator
Green - normal operation
Yellow - Transient
Red - Avoid
White - Test
How to reduce aerodynamic loading
a. Lowering thrust
b. reducing the severity of the maneuver
c. reducing airspeed
Starting and shutdown limits
APU shall not be started in tail winds in excess of 25 knots
Main engines shall not be started in tail winds in excess of 10 knots
aircraft should be oriented such that wind is coming in at the left side
land in a clear level area at least 300 feet from vertical obstructions
Power turbine inlet Temp limits
Max cont. - 816*C
Max for not more than 30 min - 854*C
Max for not more than 10 Min - 899*C
Max for not more than 2.5 min - 932*C
Max transient for not more than 12 sec - 943*C
Max transient for not more than 4 sec - >943*C
Power turbine inlet temp (PTIT) limit colors
PTIT equal or lower then 816*C - Green
PTIT between 816*C and 899*C - Yellow
PTIT between 899*C and 943*C - Red
Gas generator (NG) limits
Ground idle min. - 50%
Max - 111%
NG speed color
NG less than 50% - Yellow
NG 50 to 111% - Green
Ng above 111% - Red
Power turbine (NP) limits
Max trans. - 111.5%
NP limit colors
NP below 111.5% - Green
NP above 111.5% - Red
Engine torque (TQ) limits
Max dual engine - 100%
Max single engine - 123%
Fuel limits
Emergency fuel shall not be used for more than 6 hours
max gross weight
50,000 lbs.
Cargo hook limits
Fwd and aft hook: 17,000 lbs.
Center hook: 26,000 lbs.
Tandem from forward and aft: 25,000 lbs.
When combination of internal and external loads are carried and the external load exceeds 12,000 lbs, position internal load forward of the utility hatch.
Winch/rescue hoist limits
rescue winch - 600 lbs
winch - 3,000 lbs straight line pull
6,000 lbs, one pulley
9,000 lbs, two pulleys
12,000 lbs, three pulleys
airspeed limitations
max crosswind or sideward flight - 45 knots
max airspeed in rearward flight - 40 KCAS
Max airspeed with lower section of cabin entrance door open and locked - 60 KCAS
rescue hatch door will not be opened or closed above 90KCAS
windshield wipers will be off above 130 KCAS
do not close upper section of cabin entrance door above 100 KCAS
Left side escape hatch: do not installl or remove in forward flight
max tailwind for hover - 40 KCAS
VNE at negative density altitudes - 170 KCAS
VNE at positive density altitudes - 170 KTAS
external cargo airspeed limits
if a sling or hook should fail while carrying a tandem load, limit airspeed to max of 60 KCAS
