Limits Flashcards
What is a start cycle?
Starter initiation, acceleration in Ng, and starter dropout/ disengagement.
What are the engines limited by?
Ng, Np, TGT, oil pressure, and oil temperature
A ________ second delay between start attempts is required any time a start is aborted, except during emergencies.
60
Crossbleed starts may be attempted with the operating engine at or above ______ percent Ng and rotor speed at ______ percent Nr.
94, 100
Caution:
Donor Ng of less than 94 percent may result in ___________.
Hot starts
TGT: W/ DECU
0 to 810 C - continuous - green 810 to 851 C - 30 minutes - yellow 851 to 903 C - 2.5 minutes - red 903 to 949 C - 12 seconds - red 949 C - maximum - red
TGT w/ EDECU
0 to 810 C - continuos - green 810 to 851 C - 30 minutes - yellow 851 to 878 C - 10 minutes (power checks) - yellow 878 to 903 C - 2.5 minutes - red 903 to 949 C - 12 seconds - red 949 C - maximum - red
Power turbine speed (Np)
101 to 120% - 12 seconds - yellow
120% - maximum - red
Caution:
Operating engine steady state between __________ Np or __________ Np may cause engine damage.
20 to 40%, 60 to 75%
Main rotor speed (Nr)
<96% - avoid - red 96 to 101% - continuous - green 101 to 120% - precautionary - yellow 120% - maximum - red 127%, 137%, and 142% - overspeed latch - red
Dual engine torque (TRQ) <80 KIAS
0 to 120% - continuous - green
120 to 144% - 10 seconds - yellow
144% - maximum - red
Dual engine torque (TRQ) >80 KIAS
0 to 106% - continuous - green
106 to 127% - 10 seconds - yellow
127% - maximum - red
Single engine torque (TRQ)
0 to 135% - continuous - green
135 to 144% - 10 seconds - red
144% - maximum - red
Gas generator speed (Ng)
0 to 98% - continuous - green
98 to 102% - continuous - yellow
102 to 105% - 12 seconds - red
105% - maximum red - red
Transmission temperature (XMSN T)
-50 to 105 C - continuous - green
105 to 120 C - precautionary - yellow
120 C - maximum - red
Transmission pressure (XMSN P)
<20 psi - minimum - red
20 to 30 psi - idle and transient - yellow
30 to 65 psi (45 to 60 psi in level flight) - continuous - green
65 to 130 psi - precautionary - yellow
130 psi - maximum - red
Engine oil temperature (ENG OIL T)
-50 to 135 C - continuos - green
135 to 150 C - 30 minutes - yellow
150 C - maximum - red
Engine oil pressure (ENG OIL P)
22 psi - minimum - red 22 to 26 psi - precautionary - yellow 26 to 100 psi - continuos - green 100 to 120 psi - precautionary - yellow 120 psi - maximum - red
Note: normal idle range is 22 to 55 psi.
Engine operation with ____________ is prohibited.
Gust lock
Minimum planned fuel on landing shall be no less than _______ pounds ( approximately 20 minutes) of fuel per main tank. With fuel less than 300 pounds per main tank, maintain balanced flight at angles of bank greater than ______ degrees.
225, 30
What is transmission limited by?
Nr, torque, oil pressure, and oil temperature
Maximum wind velocity for rotor engagement or disengagement is _____ knots from any direction.
45
Note:
The ______________ must be properly secured when flight is conducted with cabin doors open.
Soundproofing
While maneuvering with a load on the rescue hoist, rate of descent is limited to ________ fpm.
1000
What are the 3 prohibited maneuvers in flight?
- Aerobatic flight
- Practice full-autorotation landings
- Intentional approaches into or inducement of retreating blade stall
Maximum rotor speed for rotor brake application is ____ percent Nr.
76
Routine rotor stops shall be made between ___ and ____ percent Nr
30, 50
Routine rotor brake stops should be limited to ____ psi to extend service life.
180
Following a complete blade fold and spread cycle, allow a ____ minute cooling period before commencing another blade fold and spread evolution.
10
Maximum operating gross weight:
23,500 pounds
Maximum launch and recovery gross weight for aviation ships:
23,500 pounds
Maximum launch and recovery gross weight for air capable ships:
22,500 pounds
Maximum total internal weight in the cabin area aft of the cockpit (to include aircrew, passengers, and/ or cargo) is _____.
5,500 pounds
Maximum total weight for palletized cargo is _____.
4,733 pounds
Maximum weight for a single pallet of cargo is ______.
3,000 pounds
Operable equipment that is required for night flight over water:
- LAWS (low altitude warning system)
2. Altitude hold
Helicopters not equipped with operable blade deice equipment are prohibited from flight into ______________________.
Forecast or known icing conditions (ambient temperatures of 5 C or below in visible moisture)
Warning:
Flight into forecast or known ______________________________.
Moderate or severe icing conditions is prohibited.
Helicopters equipped with operable anti-ice and blade deice equipment are permitted flight into know forecast ____________________________.
Or known trace or light icing conditions.
Warning:
Gunners belts do not provide impact protection; therefore, use of gunner belts shall be restricted to occurrences where ___________________________. Gunners belts shall not be worn when ______________________.
Mission accomplishment requires persons to be out of their seats,
Strapped into a seat
Operations at temperatures below ___ or above ___ are prohibited.
-40 C (-40 F), 60 C (140 F)
Rotors not engaged: APU may be operated continuously up to an ambient temperature limit of ______.
51 C
Rotors engaged: APU may be operated continuously up to an ambient temperature limit of ______. If operating the APU between _____ and_____, operation is limited to 30 minutes.
43 C,
43 and 60 C
