Limitations Flashcards
Kinds of Operations
Transport Category A land operations including over water operations in accordance with RFMS No. 19
Transport Category B land operations including over water
Water operations, limited to landing and takeoff only. Amphibious operations are prohibited.
VFR
IFR in accordance with RFMS No. 9
External load operations
Weight Limits
Category B: 20,000 pounds
External Loads: 22,000 pounds
Cargo Hook: 11,500 pounds
Ambient Temp Limits
43.5*C max
Starter Limits
Except in emergency conditions, continuous operation of starter for longer than 30 seconds is prohibited.
Attempting more than 3 starts in any 30 minute period is prohibited.
Ng Limits
Overspeed limit range (15 seconds): 103.6-105.3%
Overspeed limit: 105.3%
Max permitted speed for 2.5 OEI: 103.6%
Nf Limits
Max permitted (15 seconds): 118.5%
PTIT Limits
Starting: 949*C for 2 seconds
Transient, over-temperature: 766*C for 15 seconds for topping check
Engine Oil Limits
Max temp: 121*C
Max press: 75 psi
Min press: 8 psi
MIL-PRF-23699
Transmission Limits
Max oil temp: 110C
Min temp: -43C with MIL-PRF-23699 (SRM Transmission)
Max press: 85 psi
Min press: 20 psi
Fuel Boost Pump Limits
Boost pumps must be operative and ON for flight. In even of boost pump failure, flight is permitted only below 4,000’ PA
Unusable Fuel
175 gallon tank: 2 gallons
190 gallon tank: 1.3 gallons
Fuel Pressure Limits
Max: 995 psi
Min: 190 psi
Rotor Limits - Power OFF
Max: 113% Nr
Normal range 6,000’ PA and below: 92-113% Nr
Normal range above 6,000’ PA: 100-113% Nr
Transient range: 88-92% Nr below 6,000’ PA
Rotor Limits - Power ON
Max: 100% Nr
Max of 109% Nr is permitted for MX flights
Normal operating range up to 6,000’ PA: 92-100% Nr
Above 6,000’ PA: 100% only
Transient range: 88-92% Nr below 6,000’ PA
External load operations: 100% Nr only
Density Altitude Limits - Cat B
Takeoff: 12,500’ DA
Enroute, below 19,000 pounds: 13,000’ DA
Enroute, 19,000 pounds to 20,000 pounds: 10,000’ DA
Landing: 12,500’ DA
Density Altitude Limits - External Loads
0-19,000 pounds: 13,000’ DA
19,000-20,000 pounds: 10,000 DA
20,000-21,000 pounds: 7,500’ DA
21,000-22,000 pounds: 6,000’ DA
External Load Pickup
Vertical accelerations of the helicopter that result in rapid load pickup are prohibited
Min Crew
Minimum crew is 2 pilots required for flight
Aerobatic Maneuvers
Aerobatic maneuvers are prohibited
Icing
Flight into known icing is prohibited
Fuel Crossfeed
Fuel crossfeed is permitted only during emergency operation. Crossfeed operation is to be ceased at 400 pounds of fuel remaining in selected tank
Engine Inlet Screens
With inlet screens installed, flight is prohibited when OAT is below 2*C if visible moisture is present
Engine Inlet Anti-Ice and Pitot Heat
Engine anti-ice and pitot heat must be ON during operations at temperatures less than 4*C
Engine Anti-Ice
Engine anti-ice must be ON during operation with OAT at 4*C and below
Starting/Stopping Rotor Limits
Max steady state wind speed is 52 knots
Max permitted horizontal gust velocity is 15 knots
Low G
Negative g maneuvers are prohibited
Thunderstorms
Flight into known thunderstorms or areas of moderate to severe turbulence is prohibited
Rotor Brake Application
Rotor brake application below 40% Nr is prohibited
