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Chinook CH-47D > Limitations > Flashcards

Limitations Flashcards

1
Q

Ground control limits with rotors turning

A

Thrust-not below ground detent (for autos only)
Cyclic:
Lateral- 1”
Aft-2” (reason being is because 2” is enough to keep aft gear planted, but more could lead to droop stop pounding)
Pedals 3/4”

Forward: No limit (too many variables such as slope)

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2
Q

APU starting limits

A

Shall not be started with a tailwind in excess of 25 knots

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3
Q

Engine starting limitations

A

Shall not be stated with a tailwind in excess of 10 knots

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4
Q

Max airspeed?

A

170 kts

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5
Q

Rotor RPM limits

A 
91 PERCENT MINIMUM TRANSIENT 
97 TO 101 PERCENT NORMAL OPERATION 
102 TO 105 PERCENT TRANSIENT 
106 PERCENT MAXIMUM TRANSIENT POWER ON
108 PERCENT MAXIMUM DURING AUTOROTATION 
111 PERCENT MAXIMUM TRANSIENT
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6
Q

Engine oil pressure limits

A 
5 PSI MINIMUM AT GROUND IDLE 
35 PSI MINIMUM AT 80 TO 95% N1 (NG) 
50 PSI MINIMUM AT 95% N1 OR ABOVE 
35 TO 90 PSI FOR NORMAL OPERATION 
110 PSI MAXIMUM AT EMERGENCY POWER 
150 PSI MAXIMUM FOR COLD WEATHER STARTS
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7
Q

PTIT limits

A

400° C TO 816° C CONTINUOUS OPERATION

816° C to 854° C MAXIMUM FOR NOT MORE THAN 30 MINUTES

854° C to 899° C MAXIMUM FOR NOT MORE THAN 10 MINUTES

899° C to 932° C MAXIMUM FOR NOT MORE THAN 2.5 MINUTES

932° C to 943° C MAXIMUM FOR NOT MORE THAN 12 SECONDS NEVER EXCEED

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8
Q

N1 limits

A

50 PERCENT MINIMUM GROUND IDLE

111 PERCENT MAXIMUM

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9
Q

Engine oil temp limit?

A

149° C MAXIMUM

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10
Q

Torque limits

A

100 PERCENT MAXIMUM DUAL ENGINE

123 PRECENT MAXIMUM SINGLE ENGINE

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11
Q

Fuel flow indicator

A

2000 PPH @ 100% TORQUE

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12
Q

Transmission oil pressure limits

A

7 PSI MINIMUM AT GROUND IDLE
20 PSI MINIMUM AT 100% RRPM
20 TO 90 PSI NORMAL OPERATION

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13
Q

Transmission oil temperature

A

140 C MAXIMUM

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14
Q

Hydraulic temps

A

120 C MAXIMUM

95 C TO 120 C CAUTION

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15
Q

Flight control hydraulic pressure

A

2500 PSI MINIMUM

2500 TO 3200 PSI NORMAL OPERATION

3200 PSI MAXIMUM

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16
Q

Utility hydraulic pressure

A

2500 PSI MINIMUM

2500 TO 3500 PSI NORMAL OPERATION

3500 PSI MAXIMUM

17
Q

Max gross weight

A

50,000 lbs

18
Q

Cargo hook limits

A

The structural limit of the forward and aft hook is 17,000 pounds each.

The maximum single load that can be suspended as a tandem load from the forward and aft hooks is 25,000 pounds.

The center cargo hook is limited to a maximum load of 26,000 pounds.

When combination of internal and external loads are carried during the same flight and the exter-nal load exceeds 12,000 pounds, position the internal load forward of the utility hatch. This procedure will pre-clude encountering an excessively aft CG

19
Q

CGI cannot exceed red or yellow band for how many seconds?

A

45 secs

20
Q

Max crosswind or sideward flight

A

45kts

21
Q

Max tailwind for hover

A

45 knots

22
Q

Maximum airspeed with the lower section of the cabin entrance door open and locked is

A

60 KIAS.

23
Q

The rescue hatch door shall not be opened or closed above

A

90 KIAS

24
Q

The windshield wipers shall be off at air-speeds above

A

130 kts

25
Q

Upper section of the cabin entrance – en-sure that airspeed is less than ___ before closing door in flight.

A

100 KIAS

26
Q

External Cargo Airspeed Limits

A

If a sling or hook should fail while carrying a tandem load, limit air-speed to a maximum of 60 KIAS.

27
Q

Longitudinal Cyclic Trim (LCT) Actuator Airspeed Limits

A

Do not manually extend the LCT beyond the GND posi-tion on the cyclic trim indicators at indicated airspeeds below 60 knots. Use of extended cyclic trim at low air-speedswillresultinhighaftrotorbladestresses.

28
Q

AFCS Limitations

A

The airspeed limit when op-erating on single AFCS is 100 KIAS or Vne, whichever is slower. The helicopter may be operated with both AFCS off up to 160 KIAS or Vne, whichever is slower.

29
Q

Bank Angle Limitations

A

With an operative cruise guide indicator, bank angles are limited by the cruise guide indicator, but no greater than 60°. When operating with altitude hold, limit bank angle limits to 45° maximum.

With an inoperative cruise guide indicator, use the bank angle limits defined by Figure 2-5.

30
Q

Landing Limitations.

A

The maximum ground speed for running landings is 60 KGS.

The maximum nose-up attitude during landings is 20º.

Do not exceed 300 ft per minute on touchdowns (most conservative limit)

31
Q

Max taxi speed on ice

A

The maximum taxi speed is 5 knots ground speed when operating on hard prepared surfaces.

32
Q

Pitot heat limits

A

No more than 5 mins on, on ground

33
Q

Windshield heat shall not be used above

A

24° C

34
Q

Single Point Refueling.

A

The maximum rate for pressure refueling is 300 gpm at 55 psi

35
Q

What can’t you do with inoperative LCT’s

A

Flight below 98% rpm is prohibited with inoperative LCT’s

Chinook CH-47D (15 decks)

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