Fuel limitation
CH.3
CH.3
Primary fuels
JP-5, JP-8, F-24, TS-1
When changing from one type of authorized fuel to another, for example JP-5 to JP-8, it is not necessary to drain the helicopter fuel system before adding the new fuel.
3-1
Engines are limited by what sensors?
Ng, Np, TGT, oil pressure, and oil temperature
Transmission are limited by what sensor?
Nr, torque, oil pressure, and oil temperature
Autorotation Speed
Flare is established at what approximate AGL
100 KIAS
upon reaching 200ft AGL
At airspeeds above 80 KIAS, there is an increase in rate of descent; however, airspeeds up to 100 KIAS will also increase glide distance.
12-16
Maximum operating gross weight
23,500 lb
Fuel quantity for:
Main tanks Gravity and pressure
Internal auxiliary tanks Gravity and pressure
G- 360, P-356/G- 200, P- 194
For all fuel types, the fuel boost pumps shall be turned on prior to takeoff following any nose-down ground operations exceeding 10 minutes in duration. Boost pumps may be turned off 10 seconds after establishing/maintaining a nose-up attitude. Sustained nose-down flight operations, particularly during low fuel flow (minimum power) conditions, can result in low fuel pressure cautions upon performing a nose-up maneuver
3-6
Minimum planned fuel on landing shall be no less than
225 lb of fuel per main tank
4-4
At what temperature, during prolonged hover in hot weather, may case main transition oil temperature to rise into the precautionary range.
86'F (30'C)
SAS/BOOST OFF
140 KIAS
Maximum launch and recovery gross weight for aviation ships
23,500 LB
Primary Fuel
Restricted Fuel
Emergency Fuel
A fuel that the aircraft is AUTHORIZED to use for continuous unrestricted operations.
A fuel that IMPOSES operational restrictions on the aircraft.
A fuel which MAY BE USED FOR A MINIMUM TIME when no other primary or restricted fuel is available in case of emergency or operational necessity.
When using JP-4 or JET B (Restricted fuel), both main tank boost pumps shall be turned on
3-6
Engine starter Limitation:
Start cycle is defined when_?
starter initiation, acceleration in Ng, and starter dropout/disengagement.
1.For crossbleed starts, the receiving engine shall be at or above 24 percent Ng prior to advancing PCL to IDLE.
2. Engine start with the main rotor blades or tail rotor pylon folded is prohibited.
3. The start TGT limit is 851 °C until idle speed is attained.
4-1
Maximum percentage rotor speed for rotor brake application is_?
76% Nr
4-7
M240D/Gau-21
-Employment
-stowing of gun
-brass collecting bag emptying
120 KIAS
70 KIAS
40 KIAS
Max launch and recovery gross weight for air capable ships and amphibious assault aviation ships
22,500 LB
Minimum distance from other aircrafts or structures should be ___?
How many feet should be maintained from any operating radar set?
50ft/ 16yd
75ft
3-1
Is APU intended for routine in-flight use?
If so when is it Acceptable in-flight use
NO, APU shall be limited to essential operations only.
Emergency procedures, single engine training, practice autos, powering the ECS during extreme temperature operation.
Maximum wind velocity for blade fold and spread is
45 Knots from any direction
Time limit for cooling period before commencing another blade fold and spread evolution 10 min cycle
Complete blade fold and spread cycle is defined as a full spread evolution followed immediately by a full fold evolution or vice versea
4-5
Limitations for maneuvering with external loads and rescue hoist loads
Rate of descent is limited to 1000 fpm
4-6
Maximum total internal weight in cabin
5,500 LB
Fuel Changeover procedure if JP-4/JETB was used:
Fuel unknown/mix, assume filled with R.
Completely empty external tanks into main tanks
Operate in DIR only
1. If the fuel type is unknown or is a mixture that includes JP-4/JET B, then assume all tanks (main and external) are filled with 100 percent JP-4/JETB.
2. During ground/flight operations, empty the external tanks (if installed) into the main tanks before refueling. Proceed with Step 3. only after these tanks have been completely emptied into the main tanks.
3. Continue to operate with fuel selectors in DIR position only. Periodically refuel external tanks (if installed) and/or main tank with JP-5, JP-8, or equivalent.
3-7
Is gravity fueling authorized with engines or APU operating?
If so why?
No
Hazard caused by the location of the tanks opening relative to the engine exhaust, Rotors buld up static electrical charge of 15,000 to 20,000 volts, creating an extremely dangerous spark potential.
Helicopters not equipped with operable blade de-ice equipment are prohibited from flight into forecast or known icing conditions (ambient temperatures of 5 °C or below in visible moisture).
The following icing limitations apply:
1. Flight into known icing conditions without de-ice equipment is prohibited.
2. Flight into forecasted or known moderate or severe icing conditions is prohibited.
Hovering limitation:
What maneuvers should be avoided to prevent accumulation of exhaust fumes in helicopter and heat damage to windows on open cabin doors
Hovering turns at a rate in excess of __
Prolonged rearward flight and downwind hovering
30 Degrees/second
4-7
Palletized cargo
Single pallet of cargo
4,733 LB
3,000 LB