5 Flashcards
(34 cards)
Oil psi
120 Maximum (>120 red w/box)
23-120 Normal operation (green)
23 Minimum <23 red
NR
110 Maximum (>110 red) 106-110 Transient operation (yellow) 106 High rotor warning annunciated 95-105 Normal operation (green) 0-94 Transient operation (red)
Hydraulic psi
> 3410 Transient - permitted for 5 sec (yellow) (≥ 5 sec red w/box)
3310 - 3400 Transient - permitted for 5 min (yellow) (≥ 5 min red w/box)
2750 - 3300 Normal operation (green)
1260 Minimum (<1260 red w/box)
TGT
949 Maximum (>949 red)
904-949 Single engine transient, 12 sec (yellow)
879-903 Single engine contingency, 2.5 min (yellow)
852-878 Maximum rated power, 10 min (yellow)
851 Maximum during start
811-851 Intermediate rated power, 30 min (yellow)
810 Maximum continuous power
0-810 Normal operation (green)
Np
121 Maximum (>121 red w/box)
115 Engine overspeed annunciated
106-121 Transient operation, 12 sec (yellow, w/box at 115)
0-105 Normal operation (green)
Ng
- 1 Maximum (>105.1 red)
- 3- 105.1 Transient 12 sec (yellow)
- 1- 102.2 Normal operation (green)
- 0 Minimum engine out warning annunciated(<63.0 red w/box)
Transient torques
NR 30 (red) 0-30 Normal operation (green)
NR 70 (red) 0-70 Normal operation (green)
Dual engine TQ
115 Maximum (>115 red)
101-115 Transient 6 sec (yellow)
0-100 Normal operation (green)
Single engine TQ
125 Maximum (>125 red)
123-125 Transient 6 sec (yellow)
111-122 Single engine contingency, 2.5 min (yellow)
110 Single engine maximum continuous power (green)
0-110 Normal operation (green)
APU Caution
Avoid prolonged operation at 94%-96% NR with the APU running. The APU clutch will oscillate from engaged to disengaged. This creates high loads on the clutch and shall be avoided.
APU Operating Limitations
APU operation is prohibited during normal flight. After a fault or aborted start, wait 30 seconds after APU has stopped before attempting another start. After 2 consecutive start attempts, wait 20 minutes before third start attempt. No more than 3 start attempts are permitted in one hour.
Do not operate the APU for more than 5 minutes at a XMSN TEMP1 or 2 of 120 - 130° C. Shutdown APU to prevent damaging accessory gearbox components.
Extended APU Ground Operations
During prolonged ground operations greater than 30 minutes, observe XMSN TEMP 1 and XMSN TEMP 2 on the SYS page. If the temperatures exceed 130°C, the APU shall be shutdown and the transmission allowed to cool for 30 minutes prior to resuming APU ground operations; or transmission fluid may be cooled by operating an engine with rotor turning. There is no requirement to remove transmission side panels during extended APU ground operations. However, the transmission fluid will not get as hot under high ambient temperature conditions if the side panels are removed.
Weight limits
The aircraft maximum gross weight is 20,260 pounds, except for non-tactical ferry flights, which may not exceed 23,000 pounds.
Autorotation airspeed limits
Maximum airspeed for autorotation
is 145 KTAS. Above 145 KTAS, drag on the rotor system will cause NR to decay rapidly.
Airspeed Limits With One Engine Inoperative
The greater of:
- 67% of VNE. Above this, a successful autorotation may not be possible due to rapid NR decay.
- The airspeed for minimum power.
Maximum Airspeeds During Manual Stabilator Operations
Maximum airspeeds are based on stabilator position. The stabilator position and nominal airspeed restrictions are displayed on the FLT, FLT SET and SYS pages.
Maximum Rearward/Sideward Airspeed
45 KTAS for all gross weights
Maximum Airspeed for Searchlight Extension
The searchlight is designed for operation (extend/retract/rotate) at speeds up to 90 knots. However, as long as operation is not attempted, the light head can be left in any extended position at speeds up to VNE.
Maximum Airspeed with Symmetrically Loaded External Fuel Tanks (2 or 4) Installed
130 KTAS to prevent structural damage to the airframe.
Maximum Airspeed for Stores Jettison
Jettison of external armament stores is not authorized except for emergency conditions and then only from unaccelerated flight during:
- Maximum airspeed for stores jettison is 130 KTAS
- Hover to 45 KTAS (minimize sideslip, if,possible)
- 45 to 130 KTAS (ball centered, if possible)
Maximum Airspeed for External Tanks Jettison.
Jettison of external fuel tanks is not authorized except for emergency conditions and then only from airspeeds less than 100 KTAS. Jettison from level flight if possible, and if not, jettison at an airspeed which minimizes the rate of descent at the time of jettison.
Maneuvering limits
Intentional maneuvers beyond attitudes ±30° in pitch or ±60° in roll are prohibited.
Excessive Tail Rotor Scissors Loads
Avoid aggressive directional and lateral control inputs greater than 1 inch/second when conducting combat maneuvers requiring a left turn. This is to prevent excessive tail rotor scissors loads.
Excessive Tail Rotor Loads
Avoid large pedal step inputs in arresting right hovering / low speed yawing turns greater than 60°/second. This is to prevent excessive tail rotor drive system loads.