Limits Flashcards
Max weight
550 lbs (above 0C) or 500 lbs (below 0C)
Max gross weight
Max gross mass including external load: 7905 lbs
VNE for hoist ops with extended hoist boom within basic CG envelope
70 kts
VNE for hoist ops within extended CG envelope
50 kts
Maximum bank angle with extended hoist or with load on the hook
30 degrees
Maximum usable hoist cable length
90 m / 295 feet
Maximum pendulum movement in any direction with respect to the vertical axis of the helicopter
15 degrees
In case of forward flight a static deflection angle up to ____ to the rear is allowed.
30 degrees
Wind limits
Cable cut EP
Cut cable - Raise guard
Cut Cable PB - press
(If unaffective)
Cut manually with cable cutting shears
Single gen failure
- Emergency procedure –
Gen amps, DC volts check (dc volts < 28.2 or > 28.8) (AMPS < 0 A or > 200 A
Both bustie switches - off
(If volts > 30.5 v)
Both GEN switches - off
- Hoist cycle – Complete Before starting further hoist operation, reduce electrical load of remaining generator to 50A or below (watch ammeter).
Dual Gen Failure
- Hoist operation – Stop
- Emergency procedure: (1. Gen amps - check (if Gen amps < 0 A):
- Both BUSTIE switches - off)
- Load – Set down at nearest adequate site
- Cable – Raise manually, store cable in cabin
If manual cable raising is not possible: - Cable cutting – Perform according emergency procedure
Hoist Motor runaway
Hoist operator – sliding door upper frame
1. HOIST / HOIST STBY pb – Push
Pilot/copilot – overhead panel WINCH CONT circuit breaker – Pull
LAND AS SOON AS POSSIBLE
NOTE Pyrotechnic cable cutter remains operational regardless of WINCH CONT circuit breaker or WINCH / WINCH STBY push button status.
Hand arm signals: hold present position
Clenched fist
Hand arm signals: movement of the helicopter
Moving the open hand in the desired direction with palm facing that direction
Hand arm signals: fingers used to indicate number of____
Feet
Hand arm signals: cut hoist cable
Horizontal slashing movement of hand across neck
Hand arm signals: cable tangled
Interlocking straightened fingers of both hands
Hand arm signals: lost commo WITH hoist pendant power control
Making noise to gain the pilots attention and by yelling or hitting the floor. Recommend tapping the cable three times to try and gain HR’s attention.
A. Loss of hearing: tap on ear cups B. Loss of speaking: tap microphone
If pilot on controls is in right seat, transfer controls and relay hand arm signals to P* from HO.
Hand arm signals: lost commo WITHOUT hoist pendant power control
Making noise to gain the pilots attention and by yelling or hitting the floor to gain pilots attention and dangling pendant by cord. Recommended tapping cable three times to get HR’s attention.
Hand arm signals: Oscillation
Extend arm 90 degree and move arm in circular motion
Hand arm signals: distances will be indicated by the HO displaying ____
An open hand and showing a countdown
Hand arm signals: distance to ground
Extending one arm out open palm up when approximately 10 FT from ground. For every foot moved closer to ground the move the palm closer to top of head. When the hoist is on ground the palm should be on your head
Hand arm signals: ready for pickup
Assume guidance signal
Hand arm signals: ready to cable up
Holding hook bumper vertically with one hand and open palm patting the head with other hand
Hand arm signals: stop (HR)
Horizontal slashed with an arm, if issue is corrected, perform ready for pickup signal when ready.
Hand arm signals at night/nvd/low visibility: ready for pickup
(3 options)
- Chemlight: buzzsaw (HO responds with 3 flashes of light)
- Flashlight: three flashlight (HO responds with 3 flashes)
- Strobe: on
Hand arm signals at night/nvd/low visibility: ready to cable up
(3 methods)
- Chemlight: patting head
- Flashlight: patting head
- Strobe: off
5 Causes of oscillation
- Pilot control inputs
- hoist operator inputs
- hoist rider inputs
- zone of disruption
- environmental factors
Zone of disruption
Caused by rotor vortices: air coming down from the blades starts to churn creating turbulent air approximately 15 to 30 feet below the AC.
Severe load oscillation
Pilot
- Airspeed – Establish approx. 30 kt
Hoist operator
- Control pedant – stop raising load
- Load – Stabilize by grasping and moving cable
If oscillations persist:
- Cable – Reel-out until oscillations stop
Engine fail while conducting hoist (Single ENG capability doesn’t exist)
Maneuver AC away from ground personnel. Eng fail EP IAW RFM
MAY NEED TO CONSIDER CUTTING HOIST CABLE, every effort should be ,add to extend hoist cable rapidly to lower live load before cutting.
Spin EP
Place load on ground or conduct fly away method.
MTR HOT (motor hot) light on
Reduce rate (approx. 200 ft per min) to cool down. Will take approx 30 min before light goes away and motor cools down.
OVERHEAT caution light on control pendant illuminates steadily when temperature limits of the hoist motor or gearbox lub oil are exceeded.
- Hoist cycle – Complete
OR - Hoist operation – Stop; allow hoist to cool down until OVERHEAT caution light goes off NOTE During an overheat condition the drive motor speed is limited automatically.
D OVERHEAT light flashes for two seconds to check operation of the light when hoist is initially powered-up.
Tangled cable EP
HO announces to hold AC and stop cabling in
HO announced tangled cable and cables out slack to free cable
If unable: cut cable
Hoist motor malfunction EP
HO announces hoist motor malfunction
P* flies AC and hoist load to open safe landing site
Controllable oscillation EP
Stop cabling up and announce oscillation
Use hand and feet to manipulate oscillating cable
Cable down if necessary
Apply collective to climb (no greater than 500 ft/min)
En route phase (static hoist and dynamic)
Starts when 5 min out, ends when 1 minute out. (Static)
Starts when 5 min out, ends when 2 minutes out (dynamic)
CALLOUTS:
P announces 5 min out
P confirms “hoist control panel power switch is off”
P*, HO, HR ACU pin switches configured as required
HO/HR “maneuvering inside the cabin”
HO “conducting first set of buddy checks”
HO “first set of buddy checks complete”
P/HO “winch power to hoist on”
HO “all indications, talking to pendant”
HO “advise when 1 min out” (static) “advise when 2 min out” (dynamic)
Operational phase (static hoist and dynamic)
Starts when 1 min out, ends when hook is fully up and boom is in (if closing doors) (STATIC HOIST)
Starts when 2 min out, ends when hook is fully up and boom is in (if closing doors) (DYNAMIC HOIST)
P advises when 1 minute out (static)
P advises when 2 minutes out (dynamic)
P* lowers airspeed to 100 kts or below with doors spoiled or 50 kts if doors not spoiled and announce to crew.
ONLY BEGIN CABLING HR DOWN BELOW 40 KTS (dynamic hoist)
SEE SOP FOR MORE DETAILS
Recovery phase (static hoist and dynamic hoist)
Starts when P* advises 1 min out (if AC departed the hoisting site to loiter in safe location)
Ends when doors are closed.
P* advises when 1 min out
P sees if OGE power is available
When load is off ground P confirms we are either in the 5 min power range or not. If we are you announce how many minutes remain to continue hoist ops
SEE SOP FOR MORE DETAILS
Departure phase (static hoist and dynamic hoist)
Starts when you leave the hoist site with load
HO informs P clear to fly away
ACU pin switches as desired
HO/HR disconnect load and secure
HO stows hoist
P announces “winch power to the hoist is off”
