Hawker 125 (Series 1 through 900XP)

10-1

TKS Airframe De-icing System

WING/TAIL ANTI-ICE Control Switches

1. 
   WING/TAIL ON/OFF Switch is verified operative,
   
2. 
   WING/TAIL ON/OFF Switch is verified OFF when not in use (no audible sound from Anti-Icing Pump), and
   
3. 
   Alternate procedures for accomplishing timing are established and used.
   

1. 
   WING/TAIL ON/OFF switch is confirmed operative.
   
2. 
   Confirm the switch is OFF when not in use by listening for operation of the pump.
   
3. 
   Use clock or other means to time the use of TKS.
   

1. 
   WING/TAIL ANTI-ICE System is verified OFF (no audible sound from Anti-Icing Pump), and
   
2. 
   Airplane is not operated in visible moisture or known or forecast icing conditions.
   

1. 
   WING/TAIL ANTI-ICE System is confirmed OFF (no audible sound from Anti-Icing Pump).
   
2. 
   Plan each flight to avoid known or forecast icing conditions along entire route including alternate destination.
   

1. 
   System is verified OFF when not is use,
   
2. 
   Priming can be accomplished, and
   
3. 
   An alternate timing method is established and used.
   

1. 
   Confirm the system is off when not in use by listening for operation of the pump.
   
2. 
   Confirm that system can be primed.
   
3. 
   Check ANTICE LO PRESS annunciator OFF 15 seconds after selecting airframe anti ice ON.
   
4. 
   Use clock or other means to time the use of TKS.
   

1. 
   WING/TAIL ANTI-ICE System is verified OFF when not in use (no audible sound from Anti-Icing Pump), and
   
2. 
   WING/TAIL TIME Switch is verified to operate normally, and is used for Anti-Icing.
   

1. 
   WING/TAIL ANTI-ICE System is confirmed OFF (no audible sound from Anti-Icing Pump).
   
2. 
   Confirm normal operation of the WING/TAIL TIME Switch by selecting ON and confirming TKS flow.
   
3. 
   Use WING/TAIL TIME Switch for selecting TKS ON for anti-icing.
   

1. 
   WING/TAIL ANTI-ICE System is verified OFF (no audible sound from Anti-Icing Pump), and
   
2. 
   Airplane is not operated in visible moisture or known or forecast icing conditions.
   

1. 
   WING/TAIL ANTI-ICE System is confirmed OFF (no audible sound from Anti-Icing Pump).
   
2. 
   Plan each flight to avoid known or forecast icing conditions along entire route including alternate destination.
   

TKS Quantity Indication System

ANTI-ICE LO PRESS Annunciator (Series 750, 800, 800XP, 850XP and 900XP Only)

1. 
   Fluid delivery system is operative, and
   
2. 
   Quantity indication system is operative.
   

1. 
   Confirm that TKS system is operative, and
   
2. 
   Confirm that TKS quantity indication is operative.
   

ANTI-ICE LO QTY Annunciator (Series 750, 800, 800XP, 850XP and 900XP Only)

10-6

Auxiliary TKS System

Engine Inlet Anti-icing Systems (TFE-731 Engined Aircraft, Only)

1. 
   Associated Engine Inlet Anti-Ice (ENG A/ICE) Annunciator is operative when ENG ANTICE for that engine is selected,
   
2. 
   Takeoff and Landing field temperatures do not exceed +10 ° C, and
   
3. 
   Aircraft Flight Manual (AFM) Engine Anti-Ice ON Performance and Limitations are observed.
   

1. 
   Select ENG A/ICE ON for affected engine and confirm normal annunciation.
   
2. 
   Plan flight such that takeoff and landing temperature does not exceed 10° C for intended flight including alternates.
   
3. 
   Use Anti-Ice ON takeoff and landing performance data.
   
4. 
   Monitor engine ITT during flight.
   

1. 
   Airplane is not operated in visible moisture or in known or forecast icing conditions,
   
2. 
   Takeoff and Landing field temperature do not exceed +10 ° C, and
   
3. 
   AFM Engine Anti-Ice ON Performance and Limitations are observed.
   

1. 
   Plan flight to avoid visible moisture and known or forecast icing conditions for icing conditions for the intended flight including alternates.
   
2. 
   Plan flight such that takeoff and landing temperature does not exceed 10° C for intended flight including alternates.
   
3. 
   Use Anti-Ice ON takeoff and landing performance data.
   
4. 
   Monitor engine Interstage Turbine Temperature (ITT) during flight.
   

1. 
   Associated anti-ice valve is verified closed, and
   
2. 
   Airplane is not operated in visible moisture or in known or forecast icing conditions.
   

Engine Inlet Anti-Ice Indicators/ Annunciators

1. 
   All power indicating instruments for associated engine are operative, and
   
2. 
   Associated valve operates normally.
   

1. 
   Confirm that all engine indicators operate normally.
   
2. 
   Confirm that ITT EGT increases when anti-ice is selected ON.
   

MWS ‘ENG ICE PROT ON’ White Annunciator (Series 600 and 700, Only)

1. 
   “ENG A/ICE” white annunciators on overhead panel are verified operative, and
   
2. 
   Alternate procedures for determining operation of Engine Anti-Ice are established and used.
   

1. 
   With engines running, Select ENG ICE PROT ON and confirm ITT rise while selected and white annunciator lights in the overhead CG panel are on.
   
2. 
   Select ENG ICE PROT OFF.
   

MWS “ICE PROT SELECTED” White Annunciator (Series 750, 800, 800XP, 850XP and 900XP only)

1. 
   With the engine off and the ENG ANTICE ON confirm (amber) ENG A/ICE annunciator illuminates dim. After 2 seconds it should illuminate bright.
   
2. 
   With the engine running and the ENG ANTICE ON confirm (amber) ENG A/ICE annunciator illuminates dim and then extinguishes as the air pressure rises.
   

Pitot Probe/Pitot Mast Heaters

1. 
   Flight is conducted in day VMC flight conditions only, and
   

2. 
   Airplane is not operated in visible moisture, or in known or forecast icing conditions.
   

RVSM is not authorized.

1. 
   Conduct flight in day VMC only, and
   
2. 
   Avoid flight in visible moisture, and
   
3. 
   Plan flight to avoid known or forecast icing conditions along entire route including alternates.
   

Pitot Ammeters (Series 1 Through 400 With SB 34-140, Or Mod. 252733 Installed, Only)

1. 
   Pitot/Mast Heater Fail annunciators are verified operative before each departure, and
   
2. 
   Alternate procedures are established and used.
   

1. 
   Briefly select PITOT HEAT ON and confirm pitot probe has heated for affected probe(s) prior to each departure.
   
2. 
   Select L & R Pitot Heat OFF and confirm that PITOT HTR FAIL annunciator(s) is (are) operating.
   
3. 
   Confirm that Pitot Heaters are on prior to each departure.
   

Pitot Ammeter & Selector (Series 600 and 700 With SB 34-140, Or Mod. 252733 Installed, Or 750, 800, 800XP, 850XP and 900XP Only)

1. 
   Select L & R Pitot Heat OFF and confirm that Pitot/Mast Heater Fail annunciator(s) is (are) operative.
   
2. 
   Confirm Pitot Heaters are on prior to each departure.
   

Pitot/Mast Heater FAIL Light(s)/ Annunciator(s) (Series 1 Through 700 With SB 34-140, Or Mod. 252733 Installed, and 750, 800, 800XP, 850XP and 900XP Only)

1. 
   Associated Pitot Heating System is verified operative before each departure,
   
2. 
   Associated Pitot Heat Ammeter is operative, and
   
3. 
   Alternate procedures for monitoring Pitot Heater function in icing conditions are established and used.
   

1. 
   Select Pitot heat ON and check ammeter for normal current for both left and right Pitot Probes prior to each departure.
   
2. 
   Monitor Pitot Heater Ammeter frequently when in icing conditions.
   

Static Plate Heaters (Series 700, if installed, 750, 800, 800XP, 850XP and 900XP Only)

1. 
   Enroute operations do not require operation of both static plate heaters,
   
2. 
   Flight is conducted in day VMC flight conditions only, and
   
3. 
   Airplane is not operated in visible moisture, or in known or forecast icing conditions.
   

RVSM is not authorized

1. 
   Conduct flight in day VMC only, and
   
2. 
   Avoid flight in visible moisture, and
   
3. 
   Plan flight to avoid known or forecast icing conditions along entire route including alternates.
   
4. 
   Plan flight to avoid rush operations.
   

Stall Vane Heaters (Series 750, 800, 800XP, 850XP and 900XP Only)

1. 
   VANE HTR FAIL Annunciator for operative Stall Vane Heater is operative,
   
2. 
   Flight is conducted in day VMC flight conditions only, and
   
3. 
   Airplane is not operated in visible or forecast icing conditions.
   

1. 
   Confirm VANE HTR FAIL Annunciator for operative Stall Vane Heater is operative.
   
2. 
   Conduct flight in day VMC only, and
   
3. 
   Avoid flight in visible moisture, and
   
4. 
   Plan flight to avoid known or forecast icing conditions along entire route including alternates.
   

L and R VANE HTR FAIL Annunciators (Series 750, 800, 800XP, 850XP and 900XP Only)

1. 
   Both Stall Vane Heaters are verified operative before each departure,
   
2. 
   Flight is conducted in day VMC conditions, only, and
   
3. 
   Airplane is not operated in visible moisture, or in known or forecast icing conditions.
   

1. 
   Prior to each departure, using caution to avoid burns, confirm that both vane heaters are operative, and
   
2. 
   Plan flight to be performed in day VMC conditions only, and
   
3. 
   Avoid flight in visible moisture and known or forecast icing conditions.
   

Windscreen Heating System

1. 
   Airplane is operated in accordance with AFM Limitations, and
   
2. 
   Windscreen fluid de-icing system is installed and operative.
   

1. 
   Refer to Bird Strike Speed in AFM Limitations for temperature and speed limitations.
   
2. 
   Confirm normal operation of the windscreen de-icing system.
   

1. 
   Airplane is operated in accordance with AFM Limitations, and
   
2. 
   Airplane is not operated in known or forecast icing conditions.
   

1. 
   Refer to Bird Strike Speed in AFM Limitations for temperature and speed limitations.
   
2. 
   Plan flight to avoid known or forecast icing conditions along entire route including alternates.
   

1. 
   Airplane is operated in accordance with AFM Limitations, and
   
2. 
   Airplane is not operated in known or forecast icing conditions.
   

1. 
   Refer to Bird Strike Speed in AFM Limitations for temperature and speed limitations.
   
2. 
   Plan flight to avoid known or forecast icing conditions along entire route including alternates.
   

Windscreen Overheat Lights/ Annunciators

1. 
   Affected windscreen heat system in not used,
   
2. 
   Airplane is not operated in known or forecast icing conditions, and
   
3. 
   AFM take-off temperature and airspeed limitations are observed.
   

Windscreen Wiper Systems (Series 1 Through 700 Only)

Ice Detection System

1. 
   Airplane is not operated at night, and
   
2. 
   Alternate procedures are established and used for detection of icing and activation of airplane anti-icing equipment.
   

1. 
   Conduct flight in day only, and
   
2. 
   Avoid flight in visible moisture, and
   
3. 
   Activate anti-icing systems when near or in visible moisture below 40° F OAT.