Chapter 5 Flashcards
What are the NP1/NP2 limitations?
Transient: 91-95%
Continuous: 95-101%
Transient: 101-105%
12 Second Transient: 105-107%
*Avoid operations in the 20-40% and 60-90% except during startup and shutdown
What are the NR limitations?
POWER ON:
Transient: 91-95%
Continuous: 95-101%
Transient: 101-107%
POWER OFF:
Normal: 90-105%
Transient: 105-110%
Maximum: 110%
What are the NG limitations?
Continuous: 0-105%
12 Second Transient: 105-106%
On the PFD, digital read out will appear at 100%
What are the Q limitations?
CONTINUOUS:
Dual Engine @ or below 80kts: 0-120%
Dual Engine above 80 kts: 0-100%
Single Engine: 0-135%
10 SECOND TRANSIENT:
Dual Engine @ or below 80kts: 120-144%
Dual Engine above 80 kts: 100-140%
Single Engine: 135-144%
What are the TGT limitations?
Continuous: 0-793C
30 Minute Limit: 793-846C
10 Minute Limit: 846-879C
Start Abort Limit: 851C
2.5 Minute Limit: 879-903C
12 Second Transient: 903-949C
What are the engine oil temperature limits?
Continuous: -20-135C
30 Minute Limit: 135-150C
What are the engine oil pressure limits?
Idle: 22-26PSI
Continuous: 26-100PSI
5 Minute Limit: 100-120PSI
What are the transmission oil temperature limits?
Continuous: -20-105C
Precautionary: 105-140C
What are the transmission oil pressure limits?
Idle and transient: 20-30PSI
Continuous: 30-65PSI
Precautionary: 65-130PSI
What are the PFD power pod indications?
Normal: >200 in each tank
Precautionary: 0-200 in each tank
What are the engine starter limits?
15C (59F) and below: two consecutive start cycles, followed by a 3-minute rest period, followed by two additional consecutive start cycles. 30-minute rest is required before anymore starts.
> 15-52C(59-126F): Two consecutive start cycles can be made. 30-minute rest period is required before any additional cycles.
What are the engine start limits?
Crossbleed start shall not be attempted unless the ENG 1 ANTI ICE ON or ENG 2 ANTI ICE ON advisory does not appear, operating engine must be at 90% NG or above and NR must be at 100%
When attempting single engine starts at pressure altitudes above 14,000’, press the start switch with the ENG POWER CONT lever OFF, until maximum motoring speed (24%) is reached before advancing to IDLE
CAUTION: Engine start attempts at or above pressure altitude of 18000’ could result in hot start
What are the engine overspeed check limits?
Overspeed check in flight is prohibited. Checks on the ground are authorized by designated maintenance personnel only
What are the fuel limits?
Fuel boost pumps shall be on when operating with JP-4:
A) At 5000’ PA and above
B) When operating in crossfeed at any time with JP-4
When a helicopter operating with JP4 is restarted within 2 hours of engine shutdown and air temp is above 21C(70F) a minimum of 2 minutes dual engine at 100% NR is required to purge any hot fuel
What are the weight limitations?
UH60M: 22,000lbs
UH-60M w/ external lift: 23,500lbs
UH60M ESSS/ERFS: 24,500lbs
External lift missions above 22,000lbs can be flown with a cargo hook load above 8000lbs and up to 9000lbs
Cargo floor: 300lbs/square foot
Stowage provision limits?
125lbs per compartment
Cabin ceiling tie down limits?
4 cabin tie down fittings: 4000lbs
17 tiedowns on floor: 5000lbs
8 net restraint rings: 3500lbs
Cargo hook weight limits?
9000lbs
Cargo hook airspeed limits?
Cargo hooks up to 8000lbs: 140 KIAS
Greater than 8000lbs and greater than 22000lbs shall not exceed 120 KIAS
Single engine airspeed limits?
130KIAS
Airspeed limits for autorotations?
Gross weight of 16,825lbs or less: 150KIAS
Gross weight of 16,825 or more: 130 KIAS
Sideward/reward airspeed limits?
Hovering in winds greater than 45 kts from the sides or rear is prohibited.
Sideward/rearward flight into wind shall not exceed 45 kts
SAS inop airspeed limits?
One SAS inop: 170 KIAS
Two SAS inop: 150 KIAS
Two SAS inop in IMC: 140 KIAS
Hyrdaulic system inop airspeed limits?
One system inop: 170 KIAS
Two systems inop: 150 KIAS
Two systems inop in IMC: 140 kias
Landing light airspeed limits?
Extended prior to 130 KIAS
Max airspeed limited to 180 KIAS
Searchlight airspeed limits?
Extended prior to 100 KIAS
Max airspeed limited to 180 KIAS
Maximum airspeed for autorotation with volcano?
100 KIAS
Maximum airspeed for skis installed?`
155 KIAS
Airspeed limits with cabin doors/windows open?
Cabin doors may be fully open up to 145KIAS
Doors will not be intentionally opened in flight unless required by the mission. Should doors need to be opened, airspeed must be at 80 KIAS or less
Gunners windows may be fully open up to 170 KIAS
Limits following failure of automatic stabilator control system?
NOTE: Autorotations may not exceed 120 KIAS
Manual control available:
1) Stabilator shall be full down at speeds below 40 KIAS
2) Stabilator shall be set at 0* at speeds above 40 KIAS
Manual control not available:
Remain outside of the red Vne arc
What are the prohibited maneuvers?
Hovering turns greater than 30*/sec
Intentional maneuvers of +- 30 * in pitch or +-60* in roll
Moving both ENG CONT levers to IDLE or OFF in flight
Reward ground taxi
Blade stall
Blade stall is based on airspeed, gross weight, pressure altitude and temperature.
When operating near blade stall, any increase in airspeed, bank angle, turbulence or abrupt flight control inputs will result in increased severity of stall.
Fully developed stall will be accompanied by heavy four-per-rev vibration, increased torque, and loss of altitude
Recovery id accomplished by reducing severity of the maneuver through collective, airspeed, or bank angle reduction
High speed yaw limitations?
Above 80KIAS, avoid abrupt, full pedal inputs to prevent excessive loading of tail rotor system
Maneuvering limits with slings?
Maximum of 30* angle of bank in forward flight. Reward flight with slings limited to 35 knots
Bank angle with PRI SERVO FAIL caution?
30*
High acceleration takeoff, hover, and dive limits?
If approaching 30* nose down during any high acceleration take off, normal stabilator position can lag FCC desired position and the FCC will command an AUTO MODE FAILURE
Landing gear limitations?
Gross weights up to 16,825lbs:
-540 fpm on level terrain
-360 fpm on sloping terrain
Gross weights over 16,825lbs:
-300 fpm on level terrain
-180 fpm on sloping terrain
Landing speed limitations?
60 knots GS
Slope landing limitations?
15* nose up, right wheel or left wheel up. Reduce by 2* for every 5 kts of wing
6* nose downslope. Nose down slopes will tail winds greater than 15 kts shall be prohibited
Main rotor gearbox may be operated up to 30 min at a time with pressure fluctuations when nose up
NOTE: the flat profile of the main transmission and forward location of both transmission oil pumps, transmission oil pressure will drop during nose up operations. At a slope angle of 10, indicated pressure of 30-35PSI is normal; at slope angle of 15, 10-15PSI is normal
Flight into Icing conditions
When ambient air tempt is 4C (39F) or below and visible liquid moisture is present, icing may occur
To fly into trace or light icing, need the following installed and operational:
-Windshield anti-ice
-Pitot heat
-Engine anti-ice
-Engine inlet anti ice modulating valve
-Insulating ambient air sensing tube
To fly into moderate icing, need the previous 5 things installed AND blade deice
Engine and engine inlet anti-ice limits?
At engine power levels of 10% Q per engine and below, full anti-ice capability cannot be provided due to engine bleed limits. Avoid operations under conditions of extreme low power requirements and a high rate pf descent (1900fpm) or ground bleed air HEATER operation below 100% NR during icing conditions. Cabin heater should be turned off before high rate of descent
Back up hydraulic pump limits?
FAT: -54-32C operating time is unlimited with no cooldown time
FAT: 33-38C operating time is 24 minutes with a 72 minute cooldown
FAT 39-52C operating time is 16 minutes with 48 minute cooldown
APU operating limits?
43C and above, with engine and rotor operating, limited to 30 minutes
With engine and rotors not operating, APU may be continuously operating up to 51C
If APU OIL HOT caution appears, a 30 minute cooling period is required before checking oil level
Windshield anti ice limits?
Anti ice check shall not be done when FAT is over 27C
