Limits Flashcards
What to do if red “XXX” is indicated
Land as soon as practicable
What are the engines limited by (5 things)
Ng, Np, TGT, Oil Px, Oil Temp
Definition on starter cycle
Initiation, acceleration of the output drive, and dropout
For crossbleed starts
Receiving engine SHALL be at or above 24% Ng prior to advancing PCL to IDLE
Can the engine be started with the blades or tail folded
No
What is the TGT limit until idle speed is atained
851 C
Can the engine be operated with the gust lock engaged
No
TGT Limits
0-810, continuous (g)
810-851, 30 min (y)
851-878, 10 min (r)
878-903, 2.5 min (r)
903-949, 12 sec (r)
949, max (r)
Np Limits
1 x C
<96, avoid (r)
96-105, continuous (g)
105-117, 20 sec (y)
117-120, 12 sec (y)
120, max (r)
C: during rotor engagement, extended operations in the 20-40% and 60-75% ranges may cause engine damage
Nr Limits
<96, avoid (r)
96-101, continuous (g)
101-120, precautionary (y)
120, max (r)
<120, 123 for FCF (r)
127, overspeed latch (r)
Dual engine Tq below 80
0-120, continuous (g)
120-144, 10 sec (y)
144, max (r)
Dual engine Tq above 80
1 x N
0-106, continuous (g)
106-127, 10 sec (y)
127, max (r)
N: Dual engine Tq limits apply when both engines are above 65%
Single engine Tq
0-135, continuous (g)
135-144, 10 sec (r)
144, max (r)
Ng Limits
0-102.2, continuous (g)
>102.2-106, 2.5 min (y)
>106-107, 12 sec (y)
107, max (r)
XMSN Temp
-50-105, continuous (g)
105-120, precautionary (y)
120, max (r)
XMSN Px
20 min (r)
20-30, idle and transient (y)
30-65 (45-60), continuous (g)
65-130, precautionary (y)
130, max (r)
Engine Oil Temp
-50-135, continuous (g)
135-150, 30 min (y)
150, max (r)
Engine Oil Px
1 x N
22, min (r)
22-26, precautionary (y)
26-100, continuous (g)
100-120, precautionary (y)
120, max (r)
N: normal idle range is 22-55
Starter Limits
below 16C
first cycle-60 sec
second cycle-60 sec
third cycle-60 sec
fourth cycle-30 min
16-52C
first cycle-60 sec
second cycle-30 min
Engine Motor (ignition off)
2 x N
any temp
2 min on, 5 min off
2 min on, 30 min off
N1: starter cycle defined
N2: Times for motoring are cumulative within a 5 min period
Min planned fuel on landing
shall be no less than 600 pounds
APU use in flight (4 reasons)
- emergency procedures
- single engine training
- practice autorotations
- powering the ECS during extreme temperature operations
What is the Transmission limited by (4 things)
Nr, Tq, Oil Px, Oil Temp
governed by whichever is reached first
At what Tq do red “XXX” appear
over 150%
XMSN Oil Temp Paragraphs (verbatim, you moron)
During any operating condition, no mx action is required if main XMSN oil temp is in the precautionary range continuously for 5 min or less.
Prolonged hovering in hot weather 86F (30C), may cause main XMSN oil temp to rise into the precautionary range. Operation in the precautionary range for no less than 30sec in one flight under this condition is acceptable and no mx action is required.
XMSN Oil Px Paragraphs (make Yuri proud)
During steady state level pitch attitudes ( level flight) the XMSN oil Px should be 45-60 psi. The following conditions do not constitute an immediate emergency situation, but may be indicative of a degraded lubrication system. Any discrepancy shall be documented on a MAF
1. steady state pressure outside of 45-60 but within the normal limits of 30-65
2. fluctuations not to exceed 10 psi, within the normal limits of 30-65.
During transient pitch up or steady state nose high pitch attitudes (autos, downwind hovering, rearward flight, slope landings) XMSN oil Px fluctuations (including momentary fluctuations below 30 psi and transient droops below 20 psi for up to 1 sec) are acceptable. Operating with Px fluctuations below 30 psi shall be limited to 30 min.
During rotor engagement, a zero oil px indication may indicate a no oil flow condition through the lubrication system. Operating with a no oil px indication shall be limited to 1 min and shall be documented on a MAF
Max wind for rotor engagement/disengagement
45kts in any direction
Vne
180 kias
sideward/rearward flight
35kts
max auto airspeed
100 kias
boost off airspeed
140 kias
SAS 1 and 2 inop in IMC airspeed
125 kias
Either PRI SERVO PRESS caution airspeed
125 kias
searchlight in a fixed position other than stowed
160 kias
searchlight in transition
100 kias
dome at or above trail airspeed
70 kias, 45 aob
dome below trail airspeed
70 kias, 15 aob
definition of dome at trail
10ft of pocl, dome 6ft below aircraft
cabin door open/closing
60 kias
max rate of decent for rescue hoist loads
1000 fpm
hovering limits
- prolonged rearward flight and downwind hovering should be avoided to prevent accumulation of exhaust fumes in the helicopter and heat damage to the window on an open cabin door.
- hovering turns at a rate in excess of 30 degrees per second
- dipping sonar operations at altitudes other than 70 ft
- do not tow the transducer in the water above 8kgs with array folded and 4kgs with array unfolded
AOB limitations
- normal operations - 45
- operations above 10k DA - 30
- either PRI SERVO PRESS caution - 30
- boost off flight - 30
max operating density altitude
13k
prohibited maneuvers
- aerobatic flight
- practice full autorotation landings
- intentional approaches into or inducement of retreating blade stall
max rotor brake application
76% Nr
routine rotor stops (rotor brake)
30-50% Nr
blade/pylon fold and spread limits
max wind for blade fold/spread and pylon fold/spread is 45kts in any direction. following a complete fold/spread cycle, allow a 10 min cooling period. complete fold/spread cycle is defined as full spread immediately followed by full fold or vice versa.
max rate of decent for level terrain
720 fpm for gross weights less than 19.5k and 480 fpm for gross weights above 19.5k
max rate of decent for sloped terrain
360 fpm
max touchdown speed
75kts with tailwheel locked.
20kts with tailwheel unlocked
max taxi speed
40kgs
if shimmy damper not installed or inop, 20kgs
slope landing limits
9 up
12 cross
6 down
downwind landings?
should be avoided
max weight
23.5k. max launch and recovery for aviation ships is 23.5k. max for air capable ships is 22.5k
max cargo floor loading
300 lbs per square foot
max weight from cargo hook and rescue hoist
6k and 600
min equipment for night flight overwater
- LAWS
- altitude (R or B)
icing if I have operable anti-ice and de-ice
permitted into forecasted or known trace or light
icing if I don’t have operable anti-ice and de-ice
prohibited from flight into forecasted or known icing conditions (5C or below in visible moisture)
other icing limitations
- flight into known icing conditions without de-ice is prohibited
- flight into forecasted or known moderate or severe icing is prohibited
min equipment for passengers
ADHEELS and IHEELS shall be operational for overwater flights requiring passengers (except in emergency situations)
OAT limits
below -40C(-40F) or above 60C(140F)
backup hyd pump limits
33-38C, 24 on, 72 off
39-60C, 16 on, 48 off
APU temp limits
operation above 43C with engine and rotor operating is limited to 30 min. when engines and rotor are not operating, APU may be operated continuously up to 51C
