1
Q
Powerplant model
A
Rolls Royce 250-C20B @ 420 SHP
2
Q
Powerplant actual output
A
375 SHP at T/O power
350 SHP at MCP
3
Q
Main Rotor System
A
5 blades, fully articulated, MDHI strap pack prevents the need for bearings
4
Q
Electrical System pregeneric description
A
DC system
24 volt battery
28 volt/150 amp generator
voltage regulator, reverse current relay, overvoltage relay, generator switch
5
Q
Electrical System Generic
A
Generator Control Unit, co-location of power distribution components, increased size and isolation of main feeder lines
6
Q
Auto Reignition System general info
A
Senses signal from engine power out warning unit
Armed by main rotor trans oil pressure
RE IGN P RST light indicates exciter is energized
Must be manually reset after 55% N1 and 468 Nr
N1 or Nr tach failure causes ignitors to fire until shutdown
Any activation requires inspection
Failure of Engine out/low rotor system renders REIGN inop
7
Q
Fuel Capacity (self sealing)
A
Total 62 gallons (421.3 lbs)
Usable 59.9 gallons (407 lbs)
Unusable 2.1 gallons (14.3 lbs)
8
Q
Fuel Capacity (non-self sealing)
A
Total 64 gallons (435 lbs)
Usable 62.1 gallons (421.9 lbs)
Unusable 1.9 gallons (13.1 lbs)
9
Q
Oil Capacities
A
Engine 3 quarts
Main Transmission 12 pints
Tail Transmission 0.5 pints
10
Q
Kinds of operations approved
A
Normal category day/night VFR
11
Q
Prohibited flight conditions
A
aerobatic flight
hovering downwind with cyclic trim failure with wind 15 kts or greater
12
Q
Equipment required to be operable
A
Engine failure warning system (visual and audio)
Low rotor warning system
Outside air temperature gauge
Fuel low caution light
13
Q
Doors off approved configurations
A
All removed
Front two removed
Rear two removed
Any one removed
14
Q
Doors off limitations
A
Loose items stowed/secured
Cushions/seatbacks stowed/secured
Doors off Vne is 130 or less
Velcro is not considered secure
15
Q
Center front seat occupied limitations
A
Dual controls removed
Center seat/seatback cushions installed/secured
Seat belt/shoulder harness installed and operable
16
Q
Maximum Density Altitude
A
16,000’
17
Q
Vne
A
152 KIAS or less
18
Q
Autorotation Vne
A
130 KIAS or less
19
Q
Doors off Vne
A
130 KIAS or less
20
Q
Less than 35 lbs fuel Vne
A
130 KIAS or less
21
Q
Maximum gross weight
A
3000 lbs
22
Q
Minimum flight weight
A
1538 lbs
23
Q
Cargo deck loading limitations
A
1300 lbs and 115 pounds per square foot
24
Q
Utility stowage max weight
A
50 lbs
25
Rotor brake limitations
Stowed prior to start
| May be applied below 205 RPM
26
Rotor RPM normal range
487-492 (102%-103% N2)
27
Rotor RPM power on maximum
Maximum 492 (103% N2)
28
Rotor RPM power on minimum
Minimum 487 (102% N2)
29
Rotor RPM power off maximum
Maximum 523 (109% N2)
30
Rotor RPM power off minimum
Minimum 410 (87% N2)
31
Generator max continuous amps limit
85 amps
32
Generator above max continuous limit
85-150 amps for 10 minutes
33
Generator above 150 amps limit
2 minutes prior to takeoff during battery recharging cycle only
34
Battery overtemp limit
160F or above requires inspection before future flight
35
Starter limitations
1 minute on, 1 minute off
| 1 minute on, 23 minutes off
36
Fuel filter light limitation
fuel filter must be serviced prior to next flight
37
Fuel system must be purged
Engine flameout due to fuel exhaustion
Draining fuel from engine compartment fuel drains with start pump off
Engine shutdown using emergency fuel shutoff
Motoring engine without fuel in fuel tanks
38
5 minute torque
87.2 PSI
39
MCP torque
81. 3 PSI at or below 738C
| 74. 3 PSI above 738C
40
Transient Torque at 103% N2
87. 3-93.0 PSI for 15 seconds
| 93. 1-97.6 PSI for 3 seconds
41
5 minute tot
810C
42
Max tot for lighting
150C
43
MCP tot
738C above 74.3 PSI
| 755C below 74.3 PSI
44
Transient tot for start/shutdown
810C and above for 10 seconds
| 927C for 1 second
45
Transient tot for power changes in flight
810-843C for 6 seconds
46
MCP N1
105%
47
Minimum ground idle N1
60%
| 64%-65% recommended, but can be brought to 60% to keep N2 below 70%
48
Transient N1
106% for 15 seconds
49
N2 speed avoid range
75%-88% for max 1 minute cumulative
50
Flight ops oil temp limits
0-107C
51
Flight ops oil pressure limits
50-130 PSI with following minimums:
115 PSI at 94% N1 and above
90 PSI at 79% N1
50 PSI below 79% N1
52
EP Engine failure 500 feet or higher
```
Adjust collective to maintain Nr 410-523
Apply pedal pressure to control yaw
Adjust cyclic to 130 KIAS or less
Fuel Cutoff/Shutoff
Select landing area
Recover Nr prior to flare
Flare and touch down level
```
53
Minimum rate of descent auto
60 KIAS and 410 Nr
54
Maximum glide distance auto
80 KIAS and 410 Nr
55
EP Engine failure between 12 and 500 feet
Lower collective to maintain Nr
Flare as required
Touch down level
Avoid lowering collective or using aft cyclic after contact
56
EP Engine failure below 12 feet
Do not reduce collective
Apply right pedal
Increase collective to cushion
57
EP Partial Power Loss
Turn start pump on
Land as soon as possible
Be prepared for complete power loss
58
EP Low altitude air restart
Do not attempt if malfunction is suspected
Close twist grip to cutoff
Press start button immediately
If N1 is 18% or above, open twist grip to ground idle immediately
59
EP High altitude air restart
Do not attempt if malfunction is suspected
Perform normal engine start if N1 is below 18%
Airspeed 60 kias
Advance twist grip from ground to full once N1 reaches 60%-65%
Increase collective as required once N2/Nr are 103%
60
EP Low rotor speed (below 468 Nr)
Adjust collective to keep RPM within limits
| Check other caution/warning indicators to confirm engine trouble and respond accordingly
61
EP Water landing power off
Adjust collective to establish autorotation
Open doors and push handle full down
Flare and level, apply full pitch at contact
When roll starts, full down to minimize skipping
Release harness and exit when blades stop
62
EP Water landing power on
Descend to hover over water
Open doors and push handles full down
Passengers and copilot exit
Hover auto a safe distance away from PAX
Apply full collective pitch
When roll starts, full down to minimize skipping
Release harness and exit when blades stop
63
EP Cabin smoke and fume elimination (fire)
Cabin heat OFF
Fresh air vent OPEN
Pilot/cabin door vents OPEN and AFT
Open pilot door if necessary
64
EP Aircraft evacuation (fire)
Preflight brief to include:
Releasing seatbelts
Opening doors
Proper exiting of helicopter (heads/hands low)
65
EP Fire extinguisher (fire)
Be familiar with type of fire extinguisher and classes of fires it's approved for
Use of extinguisher not recommended on cabin fire in flight (last resort)
Use only the amount necessary to extinguish fire if necessary in flight
66
EP Fire in flight
Land Immediately
Evacuate pax
Extinguish fire
67
EP Engine fire during start
Twistgrip CUTOFF
Starter MOTOR until tot below 150C
Fuel SHUTOFF
68
EP Engine compartment fire (ground)
Twistgrip CUTOFF
Fuel SHUTOFF
Battery/ext OFF
Passengers EVACUATE
IF TIME PERMITS:
Rotor brake APPLY
Secure area
Extinguish
69
EP Engine fire at low altitude (flight)
```
Land Immediately power on
Twistgrip CUTOFF
Fuel SHUTOFF
Battery/ext OFF
Passengers EVACUATE
```
70
EP Engine fire at high altitude (flight)
```
Enter autorotation
Twistgrip CUTOFF
Fuel SHUTOFF
Radio MAYDAY
LAND
Battery/ext OFF
Passengers EVACUATE
```
71
EP Cabin fire/smoke (ground)
Twistgrip CUTOFF
Battery/ext OFF
Passengers EVACUATE
IF TIME PERMITS
Rotor brake APPLY
Secure area
Extinguish
72
EP Cabin fire/smoke (flight)
```
Land Immediately power on
Air vents AS NECESSARY
Twistgrip CUTOFF AFTER LANDING
Battery/ ext OFF
Passengers EVACUATE
```
73
EP FIRE if unable to land immediately and source is identified
Malfunctioning system OFF
Extinguish AS NECESSARY
Cabin VENTILATE
Land as soon as possible
74
EP FIRE if unable to land immediately and source is not identified
```
Cabin heat OFF
Generator OFF
All electrical circuits not required for safety of flight OFF
Cabin VENTILATE
Land as soon as possible
```
75
EP Fuel control or power turbine governor failure producing an overspeed
TQ/TOT/N1/N2/Nr increasing
Possible right yaw
Increase collective to load the main rotor
Simultaneously twist grip toward ground idle until N2 is under control
Control N2 with twistgrip
If unable to control RPM, enter autorotation and twist to CUTOFF
76
EP Fuel control or power turbine governor failure producing an underspeed
N2/Nr decaying
Possible left yaw/low rotor warning
Lower collective to maintain Nr 410-523
Maintain 60 KIAS
If insufficient power, execute autorotation landing
77
EP Power turbine governor surge
N2 fluctuation
Governor not holding pre-set speed 102%-103%
Turn start pump ON
Beep N2 to maximum
Control N2 manually with twistgrip
Land
78
EP Engine chip detector
Land as soon as possible
79
EP Low engine oil pressure (flight)
Land as soon as possible
| Shut engine down
80
EP Low engine oil pressure (ground)
Shut engine down
81
EP Loss of torque indication (flight)
Land as soon as possible
| Shut engine down
82
EP Loss of torque indication (ground)
Shut engine down
83
EP MR transmission oil pressure anunciator
Land as soon as possible
84
EP MR transmission oil temperature anunciator
Land as soon as possible
85
EP MR transmission chip detector anunciator
Land as soon as possible
86
EP TR transmission chip detector anunciator
Land as soon as possible
87
EP Anti torque failure (forward flight)
Reduce power
Adjust airspeed between 50-60 KIAS
Left cyclic and collective pitch to limit left sideslip
Execute auto landing at ground idle if conditions permit
88
EP Anti torque failure (hover)
Hover auto at ground idle
89
EP Anti torque failure (fixed TR pitch)
Adjust power to maintain 50-60 KIAS
Shallow approach to running landing between ETL and 30 knots
Directional control with small adjustments in throttle or collective
90
EP One way lock failure
| high longitudinal cyclic feedback forces
Reduce airspeed to 100 KIAS
| Limit cyclic movement to only what is required for safety
91
EP Cyclic trim failure
Establish safe flight condition with least cyclic feedback (last trimmed airspeed)
Actuate trim in an attempt to isolate failure, trim to center cyclic if possible
Check trim circuit breaker
Land as soon as practical if unable to re-establish full control
92
EP Runaway trim
Establish flight condition with least forces
Use hands and legs to aid with forces
Actuate trim through all positions
If trim runaway is full forward, land into wind and do not hover downwind in excess of 15 knots
93
EP Abnormal vibrations
Land as soon as possible
| No further flights should be attempted until the cause of vibration has been identified and corrected
94
EP Fuel filter indicator
Start pump ON
Continue flight
Service filter prior to next flight
95
EP Fuel low
Avoid large steady side slip angles and uncoordinated maneuvers
Land as soon as possible
96
EP Battery overtemp at 160F or above
Battery OFF
Land as soon as possible
Inspection required
97
EP Battery overtemp at 140F
Battery OFF
Battery remains off for remainder of flight
Inspection required
98
EP Generator out anunciator
Check GEN circuit breaker and return switch to ON
Turn generator switch OFF, then ON to reset
If GEN OUT stays on or comes back on, pull breaker and keep generator switch on to keep engine out/low rpm warnings operable
Reduce electrical load
Land as soon as practical
99
EP Air filter clogged anunciator for five seconds or more
Filter bypass OPEN
Scav air OFF
Service particle separator prior to next flight
