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HH-60G > 1H-60(H)G-1 Section 1 > Flashcards

1H-60(H)G-1 Section 1 Flashcards

1
Q

When does the impending bypass pop on the fuel filter?

A

When differential pressure reaches 6 psi

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2
Q

When does the #1 or #2 FUEL PRESS caution light illuminate?

A

When fuel pressure drops below 9 psi

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3
Q

The HMU pressurizes fuel to ___? The HMU provides __ protection at ___.

A

832 psi
Ng protection @ 110 +/- 2%

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4
Q

What are the functions of the ODV?

A
  1. Provides hot start protection ( TGT > 900°, Nf < 50%, Ng < 60%)
  2. Provides Nf overspeed protection @ 120 +/- 1%
  3. Purges fuel nozzles on engine shutdown
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5
Q

What does the engine alternator power?

A

The DEC, ignition exciter, and provides an Ng signal to the VIDS

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6
Q

What is the 10 minute TGT limiting range?

A

857-875°C

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7
Q

What is the 2.5 minute TGT limiting range?

A

881-901°C

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8
Q

When do you have access to 2.5 minute TGT limiting?

A
  1. Moving throttle(s) to DEC LOCKOUT
  2. An engine drops below 50% Ng
  3. Turning the contingency power switch on
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9
Q

How can the pilot bypass HSP?

A

By pressing and holding the respective overspeed test button on startup for said engine.

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10
Q

What do the exhaust frame sensors provide?

A

The left sensor provides Nf signal to the DEC. The right sensor provides information for the torque computation circuit and for the Nf overspeed system.

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11
Q

How many thermocouples are their on an engine?

A

7

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12
Q

When will a #1 or #2 ENGINE OIL PRESS caution light illuminate?

A

When pressure drops below 22 psi.

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13
Q

What is the engine oil tank capacity?

A

7.6 U.S. quarts

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14
Q

When does the #1 or #2 OIL FLTR BYPASS caution light illuminate?

A

When pressure reaches 60-80 psi

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15
Q

What are the parameters for a cross-bleed start?

A

The source engine must be at least 90% Ng, 100% Nr, engine anti-ice off, APU off, and AIR/SOURCE HEAT START SWITCH to ENG

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16
Q

When does power turbine speed become governed?

A

When the throttles are moved to IDLE

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17
Q

What 4 things happen when a t-handle is pulled?

A

Fuel is shut off, a stop sequence is sent to the ESU, the fire extinguisher system is armed, and the directional control valve is set

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18
Q

The APU fuel pump pressurizes to what psi?

A

5

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19
Q

Fuel consumption of the APU is rated at _____ and supplied from the _____.

A

150 lbs. per hour
Left main tank

20
Q

The APU accumulator must be at least ____ before attempting an APU start.

A

2,800 psi

21
Q

How long does it take for the accumulators to recharge?

A

180 seconds

22
Q

How much of the main rotor blade has an electro-thermal blanket covering it?

A

60% of the blades leading edge

23
Q

How much negative twist is built into the blades?

A

18°

24
Q

How far back are the main rotor blades swept back and what purpose does that serve?

A

20°. Decreases noise, tip vortices, and increases airspeed

25
Q

How much are the tail rotor blades canted upward? How much lift do they generate?

A

20° and 2.5% of total lift in a hover

26
Q

What malfunction illuminates the TAIL ROTOR QUADRANT causation light? What happens to the tail rotor when this happens?

A

A broken tail rotor cable. The tail rotor assumes full pitch in the direction of the broken cable via pressure from a spring on the rotor head.

27
Q

The main transmission has a built-in ____ forward tilt.

A

3°

28
Q

When does the MAIN XMSN OIL PRESS caution light illuminate?

A

When pressure drops below 14 +/- 2psi

29
Q

When does the MAIN XMSN OIL TEMP caution light illuminate?

A

140°C

30
Q

Should a chip be detected in the main transmission module, a delaying circuit will allow ____ for it to wash away or burn off before the caution light illuminates.

A

30 seconds

31
Q

CHP INPUT MDL-LH, CHP INPUT MDL-RH, CHIP ACCESS MDL-LH, CHP ACCESS MDL-RH, CHP INT XMSN, and CHP TAIL XMSN will illuminate immediately and stayed illuminated for ______ indicated a good circuit. The CHP MAIN MDL SUMP illuminates after a _____ delay and remains illuminated for an additional ____ then extinguish, indicating a good circuit.

A

45-70 seconds, 30 seconds

32
Q

When do the INT XMSN OIL TEMP & TAIL XMSN OIL TEMP caution lights illuminate?

A

When oil temperature reaches 140°C

33
Q

What are the characteristics of the fuel tanks?

A

They’re interchangeable, crash worthy, ballistic resistant, and have self-sealing valves.

34
Q

All engine fuel lines are _______. APU fuel lines are not.

A

Self-sealing

35
Q

When does the fuel filter impending bypass pop?

A

6 psid

36
Q

When does the PRIME BOOST PUMP advisory light illuminate?

A

5 psi

37
Q

Note

A

With the NO. 1 and NO. 2 starter circuit breakers pulled, the engine will flameout when the Overspeed test is performed.

38
Q

Note

A

If Ng increases above 110% +/- 2% due to Nf overspeed protection failure, the HMU will cutoff fuel flow and the engine will flameout with no automatic relight or capability of restart.

39
Q

What is the capacity of the main fuel tanks?

A

185 gal. total w/ 170 gal. usable

40
Q

When do the #1 & #2 FUEL LOW caution lights illuminate?

A

When remaining fuel in either tank is approximately 172lbs.

41
Q

When does the NO FUEL XFER caution light illuminate?

A

When either main tank is below 550 +/- 55 lbs.

42
Q

When does the OVERFLOW advisory light illuminate?

A

When the thermistor in the vent line detects an overflow

43
Q

Caution

A

Dry running the transfer pumps in the manual mode may cause transfer pump failure.

44
Q

How fast does fuel get dumped?

A

800 ppm

45
Q

When will fuel dumping automatically stop?

A

When the main tanks refuel down to 172 lbs. in each tank.

46
Q

What are the main generators rated for?

A

115/200 VAC

47
Q

What is the battery rated for?

A

24 VDC

HH-60G (8 decks)

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