Automatic Cabin Pressure Control System (CPC, Outflow Valve AUTO Channel)
| 21-31-01 | Automatic Cabin Pressure Control System (CPC, Outflow Valve AUTO Channel) |
|---|
Applicable to: -
21-31-01-A Automatic CPC 1 inoperative
| Repair interval | Nbr installed | Nbr required | Placard |
|---|---|---|---|
| C 13.04.2026 | 2 | 1 | No |
(o)
1)
2)
3)
4)
Automatic cabin pressure control
system 1 may be inoperative provided that:
1)
ETOPS is not conducted, and
2)
It is deactivated, and
3)
The cabin pressure indications on the CAB PRESS SD Page are checked operative in manual mode, and
4)
The LDG ELEV selector MAN function is operative.
21-31-01-B Automatic CPC 2 inoperative
| Repair interval | Nbr installed | Nbr required | Placard |
|---|---|---|---|
| C 13.04.2026 | 2 | 1 | No |
(o)
1)
2)
3)
Automatic cabin pressure control
system 2 may be inoperative provided that:
1)
It is deactivated, and
2)
The cabin pressure indications on the CAB PRESS SD Page are checked operative in manual mode,
and
3)
The LDG ELEV selector MAN function is operative.
21-31-01-C Both automatic CPCs inoperative
| Repair interval | Nbr installed | Nbr required | Placard |
|---|---|---|---|
| C 13.04.2026 | 2 | 0 | No |
Both may be inoperative provided that:
1)
The manual cabin pressure control system is operative, and
2)
The flight is not pressurized.