Piper Cheyenne IIIA Airplane Maintenance Manual page 689

PIPER AIRCRAFT
PA-42-720 (Advanced Trainer)
MAINTENANCE MANUAL
A. Distribution (continued)
18. Check Valve Removal
(a) Remove center instrument panel for access to check valve.
(b) Remove clamps securing valve in position. Remove lines from valve.
(c) Remove check valve.
19. Check Valve Installation
(a) Install new valve.
(b) Connect and secure lines to valve.
(c) Replace center instrument panel. Reinstall other hardware removed.
20. Vacuum Regulator Removal
(a) Remove or hand copilot's instrument panel to gain access to regulator.
(b) Disconnect all lines from vacuum regulator.
(c) Remove vacuum regulator.
21. Vacuum Regulator Installation
(a) Install vacuum regulator.
(b) Connect all lines to vacuum regulator.
(c) Replace copilot's instrument panel and other hardware removed. Refer to 37-20-00 for
adjustment procedure.
22. Gyro Central Air Inlet Filter Removal
(a) Remove or hang copilot's instrument panel to gain access to inlet filter.
(b) Disconnect lines from inlet filter.
(c) Remove inlet filter by removing central retaining bolt retaining filter to bracket.
23. Gyro Central Air Inlet Filter Installation
(a) Install central air filter in position. Secure with washer and nut previously removed.
(b) Connect all lines to inlet filter.
EFFECTIVITY:
040-999
Jan
10/90
36-10-00