21-21 AIR DISTRIBUTION AND RECIRCULATION

21-21-00 AIR DISTRIBUTION AND RECIRCULATION

PB.001 AIR DISTRIBUTION AND RECIRCULATION - DESCRIPTION AND OPERATION
PB.501 AIR DISTRIBUTION AND RECIRCULATION - ADJUSTMENT/TEST
- 21-21-00-710-001-A [10]
  Operational Test of the Cabin Recirculation Fans
- 21-21-00-710-002-A [10]
  Operational Test of the Individual Air Outlet

21-21-41 FILTER - RECIRCULATION

PB.301 FILTER - RECIRCULATION - SERVICING
- 21-21-41-920-002-A [10]
  DISCARD FILTER ELEMENTS OF RECIRCULATION SYSTEM
PB.401 FILTER - RECIRCULATION - REMOVAL/INSTALLATION
- 21-21-41-000-001-A [10]
  Removal of the Recirculation Filter Cartridge
- 21-21-41-400-001-A [10]
  Installation of the Recirculation Filter Cartridge

21-21-42 CHECK VALVE

PB.401 CHECK VALVE - REMOVAL/INSTALLATION
- 21-21-42-000-001-A [10]
  Removal of the Recirculation Check Valve
- 21-21-42-400-001-A [10]
  Installation of the Recirculation Check Valve

21-21-43 MIXER UNIT

PB.401 MIXER UNIT - REMOVAL/INSTALLATION
- 21-21-43-000-001-A [10]
  Removal of the Mixer Unit
- 21-21-43-000-002-A [10]
  Removal of the Lower Part of the Mixer Unit
- 21-21-43-400-002-A [10]
  Installation of the Mixer Unit
- 21-21-43-400-003-A [10]
  Installation of the Lower Part of the Mixer Unit

21-21-44 AIR OUTLET - INDIVIDUAL, COCKPIT

PB.401 AIR OUTLET - INDIVIDUAL, COCKPIT - REMOVAL/INSTALLATION
- 21-21-44-000-001-A [10]
  Removal of the CAPT (F/O) Individual Air-Outlet
- 21-21-44-400-001-A [10]
  Installation of the CAPT (F/O) Individual Air-Outlet
- 21-21-44-000-002-A [10]
  Removal of the Third (Fourth) Occupant Individual Air-Outlet
- 21-21-44-400-002-A [10]
  Installation of the Third (Fourth) Occupant Individual Air-Outlet

21-21-45 HOUSING - RECIRCULATION FILTER

PB.401 HOUSING - RECIRCULATION FILTER - REMOVAL/INSTALLATION
- 21-21-45-000-001-A [10]
  Removal of the Recirculation Filter Housing
- 21-21-45-400-001-A [10]
  Installation of the Recirculation Filter Housing

21-21-46 AIR OUTLET DISTRIBUTION VALVE

PB.401 AIR OUTLET DISTRIBUTION VALVE - REMOVAL/INSTALLATION
- 21-21-46-000-803-A [10]
  Removal of the Air-Outlet Distribution Valves
- 21-21-46-400-803-A [10]
  Installation of the Air-Outlet Distribution Valves

21-21-49 GRID - COCKPIT AIR SUPPLY DUCT

PB.701 GRID - COCKPIT AIR SUPPLY DUCT - CLEANING/PAINTING
- 21-21-49-100-001-A [10]
  Clean Cockpit Air Supply Ducting Grid

21-21-51 FAN - RECIRCULATION

PB.401 FAN - RECIRCULATION - REMOVAL/INSTALLATION
- 21-21-51-040-801-A [10]
  Deactivation of the Cabin Recirculation Fan - FAA Operators Only
- 21-21-51-440-801-A [10]
  Reactivation of the Cabin Recirculation Fan - FAA Operators Only
- 21-21-51-000-001-A [10]
  Removal of the Cabin Recirculation Fans
- 21-21-51-400-001-A [10]
  Installation of the Cabin Recirculation Fans