Limitations Flashcards
Ground control limits with rotors turning
Thrust-not below ground detent (for autos only)
Cyclic:
Lateral- 1”
Aft-2” (reason being is because 2” is enough to keep aft gear planted, but more could lead to droop stop pounding)
Pedals 3/4”
Forward: No limit (too many variables such as slope)
APU starting limits
Shall not be started with a tailwind in excess of 25 knots
Engine starting limitations
Shall not be stated with a tailwind in excess of 10 knots
Max airspeed?
170 kts
Rotor RPM limits
91 PERCENT MINIMUM TRANSIENT 97 TO 101 PERCENT NORMAL OPERATION 102 TO 105 PERCENT TRANSIENT 106 PERCENT MAXIMUM TRANSIENT POWER ON 108 PERCENT MAXIMUM DURING AUTOROTATION 111 PERCENT MAXIMUM TRANSIENT
Engine oil pressure limits
5 PSI MINIMUM AT GROUND IDLE 35 PSI MINIMUM AT 80 TO 95% N1 (NG) 50 PSI MINIMUM AT 95% N1 OR ABOVE 35 TO 90 PSI FOR NORMAL OPERATION 110 PSI MAXIMUM AT EMERGENCY POWER 150 PSI MAXIMUM FOR COLD WEATHER STARTS
PTIT limits
400° C TO 816° C CONTINUOUS OPERATION
816° C to 854° C MAXIMUM FOR NOT MORE THAN 30 MINUTES
854° C to 899° C MAXIMUM FOR NOT MORE THAN 10 MINUTES
899° C to 932° C MAXIMUM FOR NOT MORE THAN 2.5 MINUTES
932° C to 943° C MAXIMUM FOR NOT MORE THAN 12 SECONDS NEVER EXCEED
N1 limits
50 PERCENT MINIMUM GROUND IDLE
111 PERCENT MAXIMUM
Engine oil temp limit?
149° C MAXIMUM
Torque limits
100 PERCENT MAXIMUM DUAL ENGINE
123 PRECENT MAXIMUM SINGLE ENGINE
Fuel flow indicator
2000 PPH @ 100% TORQUE
Transmission oil pressure limits
7 PSI MINIMUM AT GROUND IDLE
20 PSI MINIMUM AT 100% RRPM
20 TO 90 PSI NORMAL OPERATION
Transmission oil temperature
140 C MAXIMUM
Hydraulic temps
120 C MAXIMUM
95 C TO 120 C CAUTION
Flight control hydraulic pressure
2500 PSI MINIMUM
2500 TO 3200 PSI NORMAL OPERATION
3200 PSI MAXIMUM
Utility hydraulic pressure
2500 PSI MINIMUM
2500 TO 3500 PSI NORMAL OPERATION
3500 PSI MAXIMUM
Max gross weight
50,000 lbs
Cargo hook limits
The structural limit of the forward and aft hook is 17,000 pounds each.
The maximum single load that can be suspended as a tandem load from the forward and aft hooks is 25,000 pounds.
The center cargo hook is limited to a maximum load of 26,000 pounds.
When combination of internal and external loads are carried during the same flight and the exter-nal load exceeds 12,000 pounds, position the internal load forward of the utility hatch. This procedure will pre-clude encountering an excessively aft CG
CGI cannot exceed red or yellow band for how many seconds?
45 secs
Max crosswind or sideward flight
45kts
Max tailwind for hover
45 knots
Maximum airspeed with the lower section of the cabin entrance door open and locked is
60 KIAS.
The rescue hatch door shall not be opened or closed above
90 KIAS
The windshield wipers shall be off at air-speeds above
130 kts
Upper section of the cabin entrance – en-sure that airspeed is less than ___ before closing door in flight.
100 KIAS
External Cargo Airspeed Limits
If a sling or hook should fail while carrying a tandem load, limit air-speed to a maximum of 60 KIAS.
Longitudinal Cyclic Trim (LCT) Actuator Airspeed Limits
Do not manually extend the LCT beyond the GND posi-tion on the cyclic trim indicators at indicated airspeeds below 60 knots. Use of extended cyclic trim at low air-speedswillresultinhighaftrotorbladestresses.
AFCS Limitations
The airspeed limit when op-erating on single AFCS is 100 KIAS or Vne, whichever is slower. The helicopter may be operated with both AFCS off up to 160 KIAS or Vne, whichever is slower.
Bank Angle Limitations
With an operative cruise guide indicator, bank angles are limited by the cruise guide indicator, but no greater than 60°. When operating with altitude hold, limit bank angle limits to 45° maximum.
With an inoperative cruise guide indicator, use the bank angle limits defined by Figure 2-5.
Landing Limitations.
The maximum ground speed for running landings is 60 KGS.
The maximum nose-up attitude during landings is 20º.
Do not exceed 300 ft per minute on touchdowns (most conservative limit)
Max taxi speed on ice
The maximum taxi speed is 5 knots ground speed when operating on hard prepared surfaces.
Pitot heat limits
No more than 5 mins on, on ground
Windshield heat shall not be used above
24° C
Single Point Refueling.
The maximum rate for pressure refueling is 300 gpm at 55 psi
What can’t you do with inoperative LCT’s
Flight below 98% rpm is prohibited with inoperative LCT’s
