Chapter 7 Flashcards
What are the four things we check for during preflight?
- Corrosion
- Condition
- FOD
- Security
Pylon Flight Light (5 microswitches)
Pylon lock pin switch
5* switch
Tail rotor indexer switch
2x stabilator lock pin switches
What are the two possible signs that the TGB oil is contaminated with hydraulic fluid?
over-serviced and/or a red tint to the oil
To prevent an APU exhaust fire, how long do you need to wait after APU shutdown to attempt a restart?
2 minutes to allow residual fuel to vaporize
A __________ shall be conducted any time the BLADEFOLD switch is moved from the OFF position.
head check
Successful RADALT test is indicated by…
- RAD ALT tone (5 +/- 1 beeps)
- Indicator reading 100 +/- 10’ for approx. 5 seconds
- Yellow tape illuminated up to DH setting or 100’
Successful TACAN test is indicated by…
- BRG needle swinging to 180deg. (+/-3) for 5 seconds
- DME of 0.0 nm (+/-0.5)
- NAV needle centering (within 1/2 dot)
- TO / FROM flag swap
AFCS Ground Check - SAS 1
On for at least 10 seconds then off, SAS fail advisory lights and AFCS degraded cautions should not appear during self-test.
On, then off. No movement should occur in main rotor blades. Minimal movement in flight controls is acceptable.
AFCS Ground Check - SAS 2
On, then off. No movement should occur in main rotor blades. Minimal movement in flight controls is acceptable.
AFCS Ground Check - Trim
On, then off. Minimal movement in flight controls is acceptable.
On. Slowly move cyclic fore, aft, and laterally, checking for symmetrical gradient force increase with control displacement. Repeat with pedals and collective.
Check pedal microswitches and trim release buttons.
Check 4-way.
AFCS Ground Check - Autopilot
SAS 1, SAS 2, Trim pushbuttons ON.
Autopilot on, then off. No movement should occur in flight controls.
Move flight controls through range of motion. Check for restrictions, control feedback, and rotor blade chatter.
Helicopter shall not be flown if the stabilator fails …
any check involving manual operation, position indications, or warnings.
Stab Check
Indicator should read between 34 and 42 deg. trailing edge down.
Press stab control panel test button until stab movement stops. Indicator should move 5-12 deg. up.
STAB AUTO CONTROL pushbutton - On. Warning tone stops and stab moves to 34-42 deg. trailing edge down.
Hold MAN SLEW switch UP until stab stops. Stab position should indicate between 5 and 10 deg. trailing edge up in 4 to 8 seconds.
Hold MAN SLEW down until indicator reads 0 deg.
STAB AUTO CONTROL pushbutton - On. Indicator moves to 34-42 trailing edge down.
What is Np shaft rub? How/when does it occur?
Np shaft rub occurs due to asymmetric heating of the Np shaft by a hot engine.
When the rotor brake is released, the Np shaft impacts the Ng shaft causing compressor blades to impact the casing.
The No Rotor Brake Start procedure should be used for routine engine starts and rotor engagement ashore to minimize occurrence of Np shaft rub.
How many times is the Engine Overspeed / Auto Ignition check able to fail before maintenance action is required?
If the engine relights/Ng returns to normal speed on the second attempt, the engine is acceptable. If the engine flames out/fails to relight again, maintenance action is required.
