NATOPS Misc

Question 1

What is the tail rotor preflight check for IGB?

Answer 1

Fluid within the bullseye, should not be able to see the bottom of the outer circle.

Question 2

What is the tail rotor preflight check for TGB?

Answer 2

Fluid within the lower/upper limit lines; cap secure (not overserviced or red tinted).

Question 3

What is the tail rotor indexer status during preflight?

Answer 3

Retracted.

Question 4

How does halon work to fight a fire?

Answer 4

Limit oxygen in the air causing a fire to suffocate.

Question 5

Why are the fuel levers in crossfeed for start?

Answer 5

To test the cross feed ability of the lines.

Question 6

What is the minimum nitrogen pressure if > 27C / 16C?

Answer 6

1650 psi / 1575 psi.

Question 7

What should you check if the rotor brake caution is illuminated prior to engine start/ can I just start anyway / # PSI for activating that light switch

Answer 7

Check in detent, 0 psi, don’t start up. AT (indication) / AM for servicing hydraulic rotor brake line / 6-8 psi for indication to come on.

Question 8

Why is torque a good indicator of LDS malfunction? Delete

Answer 8

LDS malfunction corresponds to collective position and will result in max input to HMU, so EDECU will not be able to trim down torque sufficiently.

Question 9

When are anti-flap restraints released?

Answer 9

Above 35% Nr.

Question 10

What are the droop stop positions?

Answer 10

50% / 70%.

Question 11

Can you do hit checks with an observer?

Answer 11

Yes.

Question 12

What should you do for rotor brake slippage on water wash?

Answer 12

Pull PCLs off and release rotor brake.

Question 13

What is HIRSS?

Answer 13

Hover Infrared Suppression System; lowers the IR signature of the aircraft but increases exhaust backpressure causing 2-2.5% loss in power available; APU exhaust does not route through HIRSS.

Question 14

What is added to the windshield reservoir if < 0C?

Answer 14

50% water / 50% isopropyl alcohol solution.

Question 15

Explain the difference between parameter limiting and engine limiting.

Answer 15

Parameters: NATOPS imposed limitations which are the direct result of design analysis, tests, and operating experience. Compliance with these limitations and restrictions will permit safe and effective employment of the airframe. Engine limiting: Reaches a governing position as part of T700 design HMU fuel flow and TGT limiting.

Question 16

Define ground resonance.

Answer 16

Ground resonance is a self-excited mechanical vibration that involves the coupling of the MRBs, specifically the lead-lag motion, with the in-plane motion of the rotor hub and the aircraft on its landing gear. Destructive, unusual, rapid onset without warning.

Question 17

Why do we lower the collective in LTE?

Answer 17

Lower left, decrease anti-torque requirements.

Question 18

How do we have T/R control in servo failure?

Answer 18

Boost servo is still pressurized and provides control. Less effective towards ends of ranges.

Question 19

Which direction does the nose yaw between 25 and 145 for cable failure?

Answer 19

Excess thrust, left yaw.

Question 20

Do the stab jackscrews act in series or in parallel?

Answer 20

In series, each providing 1/2 input. Mx moves stab via DC one remains neutral.

Question 21

What is the reset function of generator switches?

Answer 21

Resets the GCU if it was disabled or disconnected from buses.

Question 22

What happens when DTC is inop?

Answer 22

Lose: Np, Nr, Ng, fuel, TGT, Q indications.

Question 23

What are ways to kill the starter?

Answer 23

Pull handle, pull CB (behind pilot head, or upper pilot panel), air source switch off only if the APU is already off

Question 24

What does EDECU code 15 indicate?

Answer 24

May result in EDECU driven engine failure due to high / low side.

Question 25

Why do we keep the AVCS off when on deck for prolonged time?

Answer 25

On deck, AVCS analyzes vibration nulling solution on 5 minute cycle and can cause erroneous solution causing excessive and continuous vibes (exacerbated on ship).

Question 26

When Shall AVCS IBIT BE run? How long does it run for and what will the result be?

Answer 26

• Shall only be initiated with rotors static to avoid damage to dynamic components; - Causes aircraft shaking for 30s, will not result in structural damage, all nonessential personnel remain clear.

Question 27

What is Mode 1?

Answer 27

A nonsecure method used by ships to track aircraft and other ships.

Question 28

What does NATOPS recommend regarding chip malfunctions for main transmission?

Answer 28

Reduce load on that module; PCL to idle for input, turn off gen for accessory.

Question 29

What are the fuel low light timings?

Answer 29

5s to turn on, 20s to turn off.