Flight Control Hydraulics
Why is the number 2 Flight Control Hydraulic reservoir larger than the Number 1 Reservoir.
The Number 2 Reservoir is larger because it has the additional fluid for the Normal and Emergency Utility accumulators
What is your Procedure if you have 1 (2) Generator failure?
Reset, Then On. If generator does not remain On, set switch to OFF. Power is supplied to all loads by remaining Generator.
Generator Bus Switch 1 (2) check On
Max continuous load 115 Amps
Maximum Transient 150 Amps
What are the definitions of:
LAND IMMEDIATELY
LAND AS SOON AS POSSIBLE
LAND AS SOON AS PRACTICAL
IMMEDIATELY
The urgency of the landing is paramount. The primary consideration is to assure the survival of the occupants.
POSSIBLE
Land without delay at the nearest suitable area at which a safe approach and landing is reasonably assured
PRACTICAL
The duration of the flight and landing site are at the discretion of the pilot. Extended flight beyond the nearest approved landing area is not recommended
How many linear actuators are installed in the SAS system?
5 linear actuators
SAS 1 P/R/Y
SAS2 P/R
How do you perform a SAS check prior to the first flight of the day?
Easiest way to perform the check.
SAS 1 and 2 on ATT HOLD SWITCH OFF
Cyclic move forward and left against spring force
API Pitch Down API Roll Left reposition Cyclic to neutral Press and hold FTR switch API's should center within 5 seconds.
Cyclic stick aft and right against spring force
API Pitch Up API Roll right
Press and hold FTR switch API's should center within 5 seconds.
Minor input to tail Rotor pedal API should on yaw should move left and right.
Press and hold FTR switch API's should center within 5 seconds.
SAS 1 OFF
Perform same check above on SAS 2 keeping in mind there is no Yaw linear actuator on SAS 2.
When you complete SAS 2 check turn SAS 2 off and Attitude Hold switch will default to on automatically.
SAS 1 and SAS 2 back on
What is the corrective acton if you loss pressure in the #2 Flight Control Hydraulic System?
Check the pressure; if pressure is low proceed as follows:
Airspeed below 100 kts
Flight Controls: avoid rapid movements
Hydraulic Switch turn off
Land as soon as practical
If you have a BUS-TIE Caution message what is your corrective action?
GEN BUS 1 (2) ON, if setting one switch to ON trips the other, set the tripped switch back to ON after setting the other switch to OFF.
If both switches trip, set the batter switch to OFF. (Loss of Battery bus)
What is your corrective action if you have a XMSN OIL PRESS WARNING? Also will you have an aural in your headset?
Reduce power, land as soon as possible.
WARNING ON HEADSET
From a SAS stability system what must I have operation have operational to fly single Pilot IFR?
Both SAS 1 and 2 On Attitude Hold ON and Master force Trim ON
How do you perform a Flight Director Check prior to the first flight of the day?
SAS 1 and 2 are both Off when performing the FD check.
On FD Mode selector
Press SBY button and Hold:
All Mode controller lights ON
GA and DH lights on ADI on
FD Flag on ADI In view
GA on collective press and check:
GA light on ADI on
Pitch Cue visible and slightly below center on ADI
Roll Cue visible and centered on ADI
Collective Cue Visible and below center on ADI
Sync HDG Bug on HSI.
Press HDG on FD roll HDG bug L/R and roll cue should follow on ADI
Set VS bug on IVSI to 500 FPM
ON FD select VS whe you do GA light should go out and Pitch cue in ADI should indicate Pitch Up.
Reset to zero on IVSI
Press FD SBY on cycle on all modes off and no command bars in view
If you find a Hydraulic filter button popped out what would be your corrective action?
I would reset button start one engine at idle. I would then shutdown engine after 2 minutes. I would than inspect button if it is popped again. I would then contact maintenance personnel.
If you have a failure of both Generators what is your corrective action?
RESET, then On. If both generators are inoperative continue flight on battery. Land as soon as possible
Generator bus 1 and 2 On check
WARNING Battery will carry electrical load for approximately 10 minutes.
Battery operating time can be extended by selectively reducing system load
What is your corrective action if you have a 1#OIL HOT
Caution light?
Check the engine oil Temp gauge, If above the maximum shut down the engine
If you have a SAS failure what Limitation might you have?
Climb Rate must be limited to 500 FPM
Hands onn the controls
If you are flying in a coupled mode HDG and ALT HOLD ON.
What indications or failures would you have if you lost VG2?
You would lose SAS 2 and unable to reset the SAS 2 system. However you would still stay coupled however you've lost 2 functions auto trim and attitude beep on the cyclic.
What would you do after you checked the VG2 breaker.
Also how often are you required to perform a flight control hydraulic check?
Can you describe the flight control hydraulic check?
Per RFM page 1-14 (Limitation Section) must be performed before each flight
With both engine in flight matched torque 100% Nr.
Switch in Both position Make small clockwise movements cyclic and collective and tail rotor inputs all at the same time.
Pressure drops must be equal for both systems and should not exceed 70 PSI
System #2 Off (checking for Hard Over) keep hand on switch. If rotor disc tilts Servo 2 switch back to Both
Make small independent cyclic clockwise movements (checking for a servo jam) If any force increase shut down and contact Maintenance)
Make small independent collective movements
Make small independent tail pedal movements
Go back to both on
Make sure #2 Servo message is out and #2 Servo pressure is back.
Shut off #1 hydraulic system and perform the same procedure above. (checking for Hard Over)
Note remember when turning #1 system off there will be increased loads on tail rotor pedals.
In the event of a main Inverter 1 (2) failure what is your procedure?
#3 inverter will automatically power the failed 115 V and 26 V busses of he failed busses
Inverter #3 Flash to OFF and back ON to attempt to reset failed Inverter. If INV 1 (or INV2) caution doesn't extinguish (loss of affected Inverter) proceed as follows:
Inverter (1or 2) OFF
Failure of an AC Bus System
Is indicated by the relevant AC voltmeter giving no reading.
In the event of a #1 bus system failure the following instruments and equipment will continue to operate
VOR/ILS Number 2
ADF
VG2
Voltmeter 2
In the event of a #2 bus system failure the following instruments and equipment will continue to operate
VOR/ILS Number 1
VG1
Flight Director
Gyrocompass
HSI/EHSI Pilot
If you have a #1 (2) FUEL LOW what does in mean to you as the PIC?
When each engine is drawing fuel from one tank, the remaining flight duration is approximately 15 minutes from caution light illumination.
When both engines are drawing fuel from one tank, the remaining flight duration is approximately 6 minutes from caution light illumination.
Note: Always trust the Low Fuel light. Get the helicopter on the ground.
What are the 2 normal modes of stabilization in the A109C helicopter?
Attitude Hold (3rd switch on Helipilot. control panel)
Coupled Mode
If you are flying in a coupled mode LOC and GS armed in IMC conditions and lost VG1 at 900 ft agl on the approach?
What indications or failures would you have if you lose VG1 and what would be your corrective action?
If you lose VG1. you will have a VG1 SAS1 and FD failure.
You will lose your Attitude indicator and command bars.
You would have to hand fly the approach using the standby attitude indicator. Concentrate on the HSI CDI and GS inicator.
Can you fly the A109C with a dual Hydraulic system failure?
No you need at least one hydraulic system. It would provide Hydraulic pressure to be able to make outputs to the main rotor servos. (Tail rotor Boost if it was #2 system failure)
IN case of a RADIO MASTER FAILURE WHAT IS YOUR CORRECTIVE ACTION?
Radio master push button to OFF
Disengage the #1 and #2 RADIO MASTER OVRD circuit breakers then use the radio equipment as desired
Located right hand of overhead panel
What is your corrective action if you have a EMERG UTL Caution Light?
Proceed with flight. Correct trouble before next flight.
Don't like this procedure let's discuss.
Slow down and get the gear down using the normal accumulator.
If you're flying in a Coupled Mode and flying an ILS approach and are captured on the LOC and GS.
When on the approach at 900 ft AGL in IMC conditions and lose the #1 INVERTER what would be your corrective action?
SAS1 back On and coupled back up. Just select ILS on the FD
When you lose the Number 1 Inverter you will lose SAS1 and Flight Director.
What is your maximum bank in Heading Mode and when on a localizer mode?
Heading Mode 20 degrees maximum
Localizer 10 degrees maximummbank