Pneumatic Configs Flashcards
Single Engine Taxi (Engine 2 Operating):
- R PACK………………………………………..AUTO
- ISOLATION VALVE switch…………CLOSE
- L PACK……………………………………….. AUTO
- No. 1 engine BLEED air switch…. ON
- APU BLEED air switch………………..ON
- No. 2 engine BLEED air switch….ON
Note: Dual bleed light is illuminated with No. 1 engine bleed air switch on.
Single engine taxi (Engine 1 operating):
- R PACK……………………………………….AUTO
- ISOLATION VALVE…………………….AUTO
- L PACK………………………………………..AUTO
- No. 1 Eng BLEED air switch……….OFF
- APU BLEED air switch………………..ON
- No. 2 Eng BLEED air switch……….ON
-Note: No. 1 engine bleed air switch must be off in order to meet dual bleed limitations
Two engine taxi:
- R PACK…………………………………………..AUTO
- ISOLATION VALVE switch…………….AUTO
- L PACK…………………………………………….AUTO
- No. 1 eng BLEED air switch…………….ON
- APU BLEED air switch…………………….OFF
- No. 2 eng BLEED air switch…………..ON
Bleeds-off takeoff:
- R PACK…………………………………………….AUTO
- ISOLATION VALVE switch………………CLOSE
- L PACK……………………………………………..AUTO
- No. 1 Eng BLEED air switch……………..OFF
- APU BLEED air switch……………………..ON
- No. 2 Eng BLEED air switch…………….ON
Note: Configure for a bleeds-off takeoff just prior to takeoff (No. 2 engine bleed air switch off). See Supplementary procedure
External Conditioned air available:
L and R PACK switches…………………OFF
APU BLEED air switch…………………..OFF
APU is required for air conditioning:
-Cabin temp selectors……………………..AUTO
-ISOLATION VALVE………………………….OPEN
-APU BLEED AIR switch…………………..ON
(*APU must be operated at least one minute before using APU bleed air.)
-L and R PACK switches……………………AUTO/HIGH
COVID: Maximizing Cabin Air Filtration BULLETIN 21-237: Exp. 12/31/21:
PREFLIGHT AND TAXI IN:
Preflight:
- Verify Ground air-conditioned air disconnected
- Select PACKs……………….. AUTO
- RECIRC switches…………. AUTO
- Eng Bleeds …………………..ON
Taxi-in:
- Start APU. Wait 2 min.
- R Pack Hi Flow
- Iso close
- L Pack Hi Flow
- L Eng Bleed off
- APU Bleed ON
- R Pack Hi Flow
- Iso Open
- Eng 2 Shutdown
SINGLE-ENGINE TAXI IN:
- L PACK…………………………..OFF
- ISOLATION VALVE……….AUTO
- R PACK…………………………..AUTO
- No. 2 Eng. BLEED air…….ON
- APU BLEED air……………….OFF
- No. 1 Eng BLEED air………ON
DELAYED #1 ENGINE START PROCEDURE:
-L PACK………………………………..OFF
-ISOLATION VALVE……………..CLOSE
(operation of the right pack during start is permissible. #2 engine may be operated above idle thrust)
-APU BLEED air…………………….ON
-No. 1 Eng BLEED air…………….ON
-Normal engine start accomplish
DELAYED #2 ENGINE START PROCEDURE:
-No. 1 Eng BLEED air……………………..As required
(observe limitation of the dual bleed light. If #1 engine operated greater than idle thrust, turn #1 engine bleed air switch off)
-L PACK……………………………………………OFF
-ISOLATION VALVE………………..OPEN/AUTO
-R PACK……………………………………………OFF
-No. 2 Eng BLEED air………………………ON
-APU BLEED air……………………………….ON
–Normal engine start accomplish
