Piper Aircraft Corporation Malibu Mirage PA-46-350P, Airplane Maintenance Manual

Page: 307 / 1956

PAGE 11
Feb 28/07
2D5
21-30-00
PIPER AIRCRAFT, INC.
PA-46-350P, MALIBU MIRAGE
MAINTENANCE MANUAL
E. Vacuum Relief Solenoid Valve
(1) Description
The solenoid valve is mounted on the left-hand side of the F.S. 108.00 bulkhead at W.L. 57.00.
This valve is normally closed. It is in the control line between the cabin pressure controller
vacuum port and the safety valve. When energized, vacuum is applied to the diaphragm of the
safety valve, holding it open. The vacuum relief solenoid valve is open under either of the
following conditions:
(a) On the ground with the landing gear squat switch energized.
(b) In flight whenever the cabin dump switch is in the DUMP position.
(2) Removal
(a) Gain access to the solenoid valve.
(b) Disconnect the lines from the valve.
(c) Remove the screws and washers that attach the valve to the bulkhead. Remove the valve.
(3) Installation
(a) Secure the valve to the bulkhead with the screws and washers.
(b) Reconnect the lines to the valve.
(c) Tighten the nuts finger tight plus one and one-half turns.
F. Bleed Air Dump Valve
The bleed air dump valve is just forward of the firewall (F.S. 79.00) and above the bleed air
crossover duct assembly. It is actuated by the cabin pressure control knob on the instrument panel.
A. Removal
(1) Disconnect control cable from top of bleed dump valve.
(2) Remove bolts, nuts and washers that secure the bleed dump valve to the duct and
exhaust duct/cable support.
(3) Remove bleed dump valve.
B. Installation
(1) Position bleed dump valve in place.
(2) Ensure that gaskets are installed between bleed dump valve and ducts.
(3) Install bolts (heads pointing inboard) through duct flange, bleed dump valve, control cable
support and exhaust duct flange. Secure bolts with nuts and washers. Torque the nuts
from 10 to 12 in. lbs.
(4) Attach control cable rod end to dump valve arm.