Chapter 5 - Limitations Flashcards Preview

UH-60M Blackhawk Helicopter > Chapter 5 - Limitations > Flashcards

Flashcards in Chapter 5 - Limitations Deck (70)
Loading flashcards...
1

 

 

NP Limitations

 

12 - Second Transient     105-107%
Transient                      (3)  101-105%
 Continuous                  (2)    95-101%
 Transient                      (1)      91-95%

2

 

NR (Rotor) Limitations

(Power On)

Power On

TRANSIENT   101 - 107%

TRANSIENT 95 - 101%

CONTINUOUS 91 - 95%

 

3

 

 

NR (Rotor) Limitations

Power OFF (Autorotation)

Power Off (Autorotation)

MAXIMUM      105 - 110%

 TRANSIENT     90 - 105%

NORMAL                 110%

UPPER RED RANGE BEGINS AT 110% TO CORRESPOND WITH THE POWER OFF LIMIT

4

 

 

NG (Gas Generator) Limitations

NOTE:

NG DIGITAL READOUT WILL APPEAR WHEN NG INCREASES ABOVE 100%.

12 SECOND TRANSIENT     (2)  105 - 106%

CONTINUOUS                      (1)      0 - 105%

5

 

Torque (Q) Limitations

(10 Second Transient)

 

DUAL - ENGINE: 

ABOVE 80 KIAS          (4)     100 - 144%

80 KIAS OR BELOW             120 - 144%

SINGLE - ENGINE SINGLE    135 - 144%

 

6

 

Torque (Q) Limitations

(CONTINUOUS)

 

        SINGLE - ENGINE          0 - 135%

DUAL - ENGINE:

                 ABOVE 80 KIAS             0 - 100%

AT OR BELOW 80 KIAS 0 - 120%

7

 

 

TGT Limitations

12 SECOND TRANSIENT                                                  903 - 949 C

2.5 MINUTE TRANSIENT (CONTINGENCY POWER) (4) 879 - 903 C

START ABORT LIMIT                     851 C

10 MINUTE LIMIT         (3)    846 - 879 C

30 MINUTE LIMIT        (2)     793 - 846 C

NORMAL                      (1)          0 - 793 C

NOTE: ON THE POWER POD TGT IS NOT DISPLAYED UNLESS ABOVE 793 C

8

 

 

 

ENGINE OIL TEMPERATURE Limits

 

ENGINE                         TEMP 

30 MINUTE LIMIT       (2)    135 - 150 C

CONTINUOUS            (1)     -20 - 135 C

9

 

 

 

ENGINE OIL PRESSURE Limits

 ENGINE                        Pressure

 5 MINUTE LIMIT    (3)    100 - 120 PSI

NORMAL               (2)     26 - 100 PSI

 IDLE                       (1)       22 - 26 PSI

10

 

 

TRANSMISSION OIL TEMPERATURE Limits

TRANSMISSION                           Temp

    PRECAUTIONARY           (2)       105 - 140 C

    CONTINUOUS                 (1)        -20 - 105 C

11

 

 

TRANSMISSION OIL PRESSURE Limits

TRANSMISSION                         Pressure 

PRECAUTIONARY            (3)       65-130 PSI

CONTINUOUS                  (2)        30-65 PSI

IDLE AND TRANSIENT      (1)       20-30 PSI

12

 

 

FUEL Indication markings

 

 NORMAL                            (1)      > 200 (EACH TANK)

PRECAUTIONARY             (2)   0 - 200 (EACH TANK)

13

 

Engine NP Limitations 

NOTE:

Avoid operations in __  - __% and __% - __% NP range except during start and shutdown.

 

 

 

20% - 40% and 60% - 90% NP

14

 

Engine Starter Limits (below 15°​C)

At ambient temperatures of __°C and below, __ consecutive start cycles may be made, followed by a __ minute rest period, followed by two additional consecutive start cycles. A __ minute rest period is then required before any additional starts.

 

 

At ambient temperatures of 15°C (59°F) and below, two consecutive start cycles may be made, followed by a 3 minute rest period, followed by two additional consecutive start cycles. A 30 minute rest period is then required before any additional starts.

15

 

 

Engine Starter Limits above 15° C:

At ambient temperatures above ___ up to ___, ___ consecutive start cycles may be made. A ___ minute rest period is then required before any additional start cycles.

 

 

At ambient temperatures above 15° up to 52°C (59° up to 126°F), two consecutive start cycles may be made. A 30 minute rest period is then required before any additional start cycles.

16

Fuel boost pumps shall be on when operating with JP-4 or equivalent (as specificed in Operator's Manual):

 

(1) At _______ feet pressure altitude and above.

(2) When operating in _____ with JP-4 at ____ altitude.

Fuel boost pumps shall be on when operating with JP-4 or

equivalent (as specified in Operator’s Manual):

 

(1) At 5000 feet pressure altitude and above.

(2) When operating in crossfeed with JP-4 at any altitude.

17

PNEUMATIC SOURCE INLET LIMITS:

The minimum ground-air source (pneumatic) required

to start the helicopter engines is __ psig and __ ppm at

___°C. The maximum ground-air source to be applied

to the helicopter is __ psig at _____ °C,

measured at the external air connector on the fuselage.

 

The minimum ground-air source (pneumatic) required

to start the helicopter engines is 40 psig and 30 ppm at

149°C (300°F). The maximum ground-air source to be applied

to the helicopter is 50 psig at 249°C (480°F),

measured at the external air connector on the fuselage.

18

ENGINE START LIMITS

 

CAUTION

Engine start attempts at or above a pressure

altitude of ____ feet could result in

a ____   _____.

 

 

Engine start attempts at or above a pressure

altitude of 18,000 feet could result in

a hot start.

19

 

CAUTION

Due to fuel volatility, when converting

from JP-4 to JP-5/JP-8, ____ helicopter

refueling operations must be completed

before performing operations with fuel

boost pumps off.

 

 

Due to fuel volatility, when converting

from JP-4 to JP-5/JP-8, three helicopter

refueling operations must be completed

before performing operations with fuel

boost pumps off.

20

 

When a helicopter operating with JP-4 is restarted

within ___ hours of engine shutdown and the air temperature

is above ___ , a minimum of ___ minutes of dual

engine ground operation at 100% NR is required prior to

takeoff to purge possible hot fuel from engine nacelle area.

 

When a helicopter operating with JP-4 is restarted

within  2 hours of engine shutdown and the air temperature

is above 21°C (70°F), a minimum of  2 minutes of dual

engine ground operation at 100% NR is required prior to

takeoff to purge possible hot fuel from engine nacelle area.

21

           

       HELICOPTER                                    MAXIMUM WEIGHT

UH-60M                                                          _____lbs

 UH-60M external lift mission                           _____lbs

 ESSS/ERFS helicopter onferry mission          _____lbs

     (Airworthinessrelease required)                                          

 

HELICOPTER                                    MAXIMUM WEIGHT

                         UH-60M                                                         22,000 lbs

                         UH-60M external lift mission                          23,500 lbs

                         ESSS/ERFS helicopter onferry mission         23,500 lbs

                         (Airworthinessrelease required)          

22

 

 

External lift missions above _____ pounds can only be flown with cargo hook loads above _____ pounds and up to _____ pounds.

 

 

External lift missions above 22,000 pounds can only be flown with cargo hook loads above 8,000 pounds and up to 9,000 pounds.

23

 

 

Maximum weight is further limited by cargo floor

maximum capacity of ____ pounds per square foot.

 

 

Maximum weight is further limited by cargo floor

maximum capacity of 300 pounds per square foot.

24

 

 

 

Maximum capacity for each storage compartment is _____ pounds.

 

 

 

Maximum capacity for each storage compartment is 125 pounds.

25

 

 

 

The four cabin ceiling tiedown fittings have a limited load capability of ______ pounds.

 

 

 

 

 

The four cabin ceiling tiedown fittings have a limited load capability of 4,000 pounds.

 

26

 

 

 

The ____ (number) tiedown fittings installed on the cargo floor can restrain a ____ pound load in any direction.

 

 

 

 

The 17 tiedown fittings installed on the cargo floor can restrain a 5,000 pound load in any direction.

 

27

 

 

 

The ____ (number) net restraint rings in the cargo compartment are rated at _____ pound capacity in any direction.

 

 

 

The eight net restraint rings in the cargo compartment are rated at 3,500 pound capacity in any direction.

28

 

 

 

The maximum weight that may be suspended from the cargo hook is _____ pounds.

 

 

 

The maximum weight that may be suspended from the cargo hook is 9,000 pounds.

29

 

 

Maximum airspeed with external cargo hook loads up to _____ pounds is ____ KIAS and greater than _____ pounds and a corresponding gross weight greater than ____ pounds will vary due to the external load physical configuration, but shall not exceed ____ KIAS.

 

 

Maximum airspeed with external cargo hook loads up to 8,000 pounds is 140 KIAS and greater than 8,000 pounds and a corresponding gross weight greater than 22,000 pounds will vary due to the external load physical configuration, but shall not exceed 120 KIAS.

30

 

 

 

Maximum airspeed for one engine inoperative is ____ KIAS.

 

 

 

Maximum airspeed for one engine inoperative is  130 KIAS.