Limits (Ch. 4) Flashcards
Turbine Gas Temperature
TGT
IRP DECUs
- 0-810°C Continuous
- 810-851 30 minutes
- 851-903 2.5 minutes
- 903-949 12 seconds
- 949 maximum
TGT
MRP EDECUs
- 0-810°C Continuous
- 810-851 30 min
- 851-878 10 min
- 878-903 2.5 min
- 903-949 12 sec
- 949 max
Np
Power Turbine Speed
- <96% Avoid
- 96-105 Continuous
- 105-120% 12 seconds
- 120% Maximum
Nr
Main Rotor Speed
- <96% Avoid
- 96-101 Continuous
- 101-120 Precautionary
- 120% Max
- >120% 123%, Maximum for FCF only
- 127, 137, &142 Overspeed Latch
Dual Engine Torque
<80 KIAS
- 0-120% Continuous
- 120-144% 10 seconds
- 144% Maximum
Dual Engine Torque
>80 KIAS
- 0-106% Continuous
- 106-127% 10 seconds
- 127% Maximum
Dual Engine Torque Limits apply when both engines are above 65% torque.
Single Engine Torque
- 0-135% Continuous
- 135-144 10 seconds
- 144% Maximum
Ng
Gas Generator Speed
- 0-98% Continuous
- 98-102.2 Continuous
- 102.2-105.1 12 Seconds
- 105.1% Maximum
XMSN T
- -50 to 105°C Continuous
- 105 to 120 Precautionary
- 120 Maximum
XMSN Pressure
- 20psi minimum
- 20-30 idle and transient
- 30-65 continuous (45 to 60 in level flight)
- 65-130 precautionary
- 130 Maximum
ENG Oil Temp
- -50 to 135°C Continuous
- 135-150 30 min
- 150 Maximum
ENG Oil Pressure
- 22psi Minumum
- 22-26 Precautionary
- 26-100 Continuous
- 100-120 Precautionary
- 120 psi Maximum
*Normal Idle range is 22 to 55 psi.
Engine Starter Limitations
- <16°C
- first cycle —————60 seconds
- seconds cycle———60 seconds
- third cycle—————60 seconds
- fourth cycle————-30 minutes
- 16 to 52 °C
- first cycle—————-60 seconds
- second cycle———-30 minutes
- engine motor (ignition off)
- 2 minutes engaged——-5 min disengaged
- 2 minutes engaged——30 min disengaged
Minimum Planned Fuel on Deck
- Shall be no less than 600 lbs
APU limitations
- SHALL be limited to essential operations only.
- acceptable uses in flight includes:
- emergency procedures
- single-engine training
- practice autorotations
- powering ECS during extreme temp ops
Transmission Limitations
- limited by Nr, torque, oil P, oil T (whichever is reached first
- prolonged hovering in hot wx (95°F) and high gross weight may cause temps to rise in yellow range. ops in this range for less than 30 minutes during any one flight is acceptable.
- oil limits:
- level flt = 45-60 psi.
- steady pressure outside 45-60 but within normal limits f 30-65
- fluctuations not to exceed a range of 10psi, within normal limits of 30 to 65.
- during transient pitch or nose high attitudes xmsn oil pressure fluctuations (including momentary below 30psi and transient drops below 20psi for up to 1 sec) are acceptable. operating with pressure fluctuations below 30psi SHALL be limited to 30 min.
- level flt = 45-60 psi.
Vne
180 KIAS
Sideward/rearward flight
35 knots
Autorotation
100 KIAS
Boost Off
140 KIAS
Two SAS inop in IMC
125 KIAS
Either PRI SERVO PRESS caution
125 KIAS
Searchlight in fixed position other than stowed?
Searchlight in transition?
160 KIAS
100 KIAS
Dome at trail?
Dome below trail?
70 KIAS, 45° AOB
70 KIAS, 15° AOB
cabin door opening/closing
60 KIAS
Hovering turn rate?
Towing Transducer?
30° per second
8KGS folded, 4KGS unfolded
Angle of Bank (AOB) Limits
- Normal ops - 45°
- operations above 10,000ft DA - 30°
- Either PRI SERVO PRESS caution ON - 30°
- Boost off flight - 30°
Prohibited Maneuvers
- Aerobatic flight
- Practice full autorotations
- Intentional approaches into or inducement of retreating blade stall
Rotor Brake Operating Limitations
- Max rotor speed for applications is 76% Nr
- routine stops shall be made between 30 and 50% Nr
- Stops limited to 180 psi
Blade, Pylon, and Stab fold and spread limits
- max wind velocy for fold or spread is 45 kts from any direction
- following a complete fold and spread cycle, allow a 10min cooling period before commencing another fold or spread.
- complete blade fold and spread cycle is defined as a full spread evolution followed immediately by a full fold.
Landing Limitations
Rate of Descent
- level terrain shall not exceed 720 fpm for gross weight less than 19,500 lbs, and 480 for gross weight above 19,500 lbs
- for sloped terrain shall not exceed 360 fpm.
max touchdown speed
- 75 KGS with tailwheel locked
- 20 KGS with tailwheel unlocked
max ground taxi speed
- 40 KGS with tail gear shimmy damper
- 20 KGS without damper
Slope Landing Limits
- 6° nose-down slope
- 9° nose-up slope
- 12° cross-slope
Aircraft Operating Gross Weight Limits
- max gross weight is 23,500 lbs
- aviation ship 23,500 lbs
- air capable ship 22,500 lbs
Minimum Aircraft Equipment for Night Flight Over Water
- LAWS
- Altitude hold (RADALT or BARALT)
Operating Temperature Limits
- -40° C to 60° C
- (-40° F to 140° F)
APU Operating Limitations
- 43° C and above with engine and rotor operating limited to 30 minutes
- engine and rotor not operating, the APU may be operated continuously up to an ambient temp of 51° C
Backup Hyd Pump Limits
- min operating——Min Cooling
- 33 to 38° C—-24min————72min
- 39 to 60° C—16 min————48 min
