Hawker 125 (Series 1 through 900XP)

10-1

Potable Water System

1. 
   Associated components are deactivated or isolated, and
   
2. 
   Associated system components are verified not to have leaks.
   

Any portion of the system which is operative may be used.

1. 
   Pull and collar appropriate circuit breaker(s).
   
2. 
   Check associated components to assure that there are no signs of leakage.
   
3. 
   Install ‘INOP’ placard.
   

Reference applicable AMM, AMM Addenda, or AMM Supplement for procedures and associated Circuit Breakers.

1. 
   System is drained, and
   
2. 
   Procedures are established to ensure that the system is not serviced.
   

1. 
   Remove water supply tank and drain existing water.
   
2. 
   Ensure that system is not serviced.
   

Basin Waste System

1. 
   Associated components are drained and not used,
   
2. 
   Ram Air and Dump Valve, or Vent Valve (Post Mod. 25G726A/C) are verified operative before the first flight of the day,
   
3. 
   DUMP VLV, or VENT VALVE (Post Mod. 25G726A/C) is selected OPEN,
   
4. 
   Flight is conducted in an unpressurized configuration, and
   
5. 
   Aircraft is operated at or below 15,000 feet MSL.
   
6. 
   Applicable Oxygen Requirements are established and complied with.
   

1. 
   Drain associated components, as needed and install ‘INOP’ placard,
   
2. 
   Reference Table 1, Configure Aircraft for Unpressurized Flight.
   

1. 
   Associated components and water supply are drained, and
   
2. 
   Procedures are established to ensure the system is not serviced or used.
   

1. 
   Drain associated components and water supply, and
   
2. 
   Establish procedures to ensure system is not serviced or used.
   

Lavatory Waste System (Blue Water)

1. 
   Associated Lavatory Waste Tank is drained,
   
2. 
   Pilot in Command determines that flight duration is acceptable with toilet unusable,
   
3. 
   Associated toilet is secured closed and placarded, ‘INOP DO NOT USE’,
   
4. 
   Ram Air and Dump Valve, or Vent Valve (Post Mod. 25G726A/C) are verified operative before the first flight of the day,
   
5. 
   DUMP VLV, or VENT VALVE (Post Mod. 25G726A/C) is selected OPEN,
   
6. 
   Flight is conducted in an unpressurized configuration, and
   
7. 
   Aircraft is operated at or below 15,000 feet MSL.
   
8. 
   Applicable Oxygen Requirements are established and complied with.
   

1. 
   Ensure that Lavatory (LAV) Waste water is drained,
   
2. 
   Determine if flight duration is acceptable with toilet unusable,
   
3. 
   Secure lavatory door(s) and placard ‘INOPERATIVE, DO NOT USE’, and
   
4. 
   Reference Table 1, Configure Aircraft for Unpressurized Flight.
   

1. 
   Associated components and water supply are drained, and
   
2. 
   Procedures are established to ensure the system is not serviced or used.
   

1. 
   Ensure associated components and water supply are drained, and
   
2. 
   Establish procedures to ensure the system is not used.