NATOPS Chapter 4

Question 1

Eng Starter Limits
<16 C
16-52 C

Engine Motor (ignition OFF)

Answer 1

<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)

Question 2

Hovering Limitations

Answer 2

1. Prolonged rearward flight and downwind hovering should be avoided to prevent fumes in the A/C
2. Hovering turns at a rate in excess of 30* per second
3. Dipping sonar operations at altitudes other than 70 ft
4. Do not tow the transducer in the water above 8 KGS with array folded and 4 KGS with array unfolded
   (towing is defined as the cable contacting the funnel)

Question 3

AOB limits

Answer 3

Above 10000 ft DA -30

Either PRI Servo light- 30

Boost off flight- 30

Question 4

Ng limits

Answer 4

0-102.2%, continuous, green

102.2%-106%, 2.5 minutes, red

106-107%, 12 seconds, red

Max 107%

Question 5

Gross Weight Limits

Answer 5

Max - 23,500 lbs
Aviation ships - 23,500 lbs
air-capable ships/amphibious assault aviation ships - 22,500 lbs

Question 6

Slope limits?

Answer 6

6 nose down

9 nose up

12 cross slope

Question 7

APU operating limits?

Answer 7

Either eng and rotor operating

• 30 min with a temp of 43 C and above

Eng and rotor not operating

• APU and eng continuously operating up to 51 C

Question 8

TGT Limits

Answer 8

0-810, continuous, green

810-851, 30 min, yellow

851-878, 10 min, red

878-903, 2.5 min, red

903-949, 12 seconds, red

949, max, red

Question 9

Engine Oil Px

1 note

Answer 9

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

Question 10

APU Limitations (Uses)

Answer 10

The APU is not intended for routine in flight use. Operation in flight shall be limited to essential operations only, including:

EP’s
Single engine training
Practice autos
Powering ECS during extreme conditions

Question 11

Transmission Px

Answer 11

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

Question 12

Np

Answer 12

<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%

Question 13

Max touchdown speed

Answer 13

75 KGS w/ locked tailwheel

20kgs w/ unlocked tailwheel

Question 14

Dual engine TQ > 80kias

+ note

Answer 14

0-106%, continuous, green

106-127%, 10 seconds, yellow

127%, max, red

Dual engine TQ limits apply when both engines are above 65%

Question 15

Transmission temp

Answer 15

-50-105 C, continuous, green

105-120 C, precautionary, yellow

120 C max red

Question 16

Dual engine TQ <80kias

Answer 16

0-120%, continuous, green

120-144%, 10 seconds, yellow

144%, max, red

Question 17

Starter cycle is defined by?

Answer 17

Initiation

Acceleration

Dropout

Question 18

Backup Hyd pump limitations

Answer 18

33-38 C
24 min ON
72 min OFF

39-60 C
16 min ON
48 min OFF

Question 19

Engines are limited by what 5 things?

Answer 19

Ng

Np

TGT

Oil px

Oil temp

Question 20

Rotor brake limits?

Answer 20

Max 76%

30-50% for regular stops

180 psi

Question 21

Temp limits

Answer 21

Temps below -40C or above 60C are prohibited

Question 22

Transmission Oil pressure limitations
Shall me documented on a MAF:
During Transient Pitch or steady-state nose-high attitudes:

Answer 22

-Steady pressure outside 45-60 psi but within the normal limits of 30-65 psi
-Fluctuations not to exceed a range of 10 psi, within the normal limits of 30-65 psi

-Transmission oil pressure fluctuations (including momentary fluctuations below 30 psi and transient drops below 20 psi for up to one second) are acceptable.
-Operating with pressure fluctuations below 30 psi shall be limited to 30 min

Question 23

Airspeeds:

Answer 23

Sideward/rearward- 35 knots
Cabin door opening or closing- 60 kias
Dome at or above trail (cable extended 10 ft, dome approx 6 ft below a/c) - 70 kias, 45*
Dome below trail - 70 kias, 15*
Autorotation- 100 kias
Search light transition- 100 kias
2 SAS in IMC- 125 kias
PRI SERVO PRESS- 125
Boost off- 140 kias
Search light other than stowed- 160 kias
Vne -180 kias

Question 24

Icing Conditions: 4 things for Chp 4

Answer 24

1. Helicopters equipped with operable anti-ice and blade deice equipment are permitted flight into forecast or known trace or light icing conditions
2. all installed anti-ice/deice equipment shall be operational prior to flight.
3. Helicopters not equipped with operable blade deice equipment are prohibited from flight into forecast or known icing conditions (ambient temps of 5*C or below in visible moisture)
4. Flight into forecast or known moderate or severe icing conditions is prohibited

Question 25

Nr limits

Answer 25

<96%, avoid, red

96-101%, continuous, green

101-120%, precautionary, yellow

120, max, red

123% max for FCF auto

127% overspeed latch

Question 26

Rate of descent for a/c landing above 19500 lbs? Below?

Sloped terrain?

Answer 26

480 fpm

720 fpm

360 fpm

Question 27

Ng (sys config 16)

Answer 27

0-102.2%, continuous, green

102.2%-106%, 2.5 minutes, yellow

106-107%, 12 seconds, red

Max 107%, red

Question 28

Prohibited Maneuvers

Answer 28

1. Aerobatic flight
2. Practice full-autorotation landings
3. Intentional approaches into or inducement of retreating blade stall

Question 29

ENGINE TQs over 150% are displayed as

Answer 29

Red XXX

Any time a limited is exceeded so much that is displays XXX, land as soon as practicable

Question 30

Single Eng TQ

Answer 30

0-135%, continuous, green

135%-144%, 10 seconds, red

144%, max, red

Question 31

Max taxi speed?

Answer 31

40 KGS with shimmy dampener

20 KGS without shimmy dampener

Question 32

Engine Oil Temp

Answer 32

-50 to 135 C, continuous, green

135 to 150 C, 30 min, yellow

150 C max