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

Page: 289 / 1956

PAGE 1
Feb 28/07
2C11
21-20-00
PIPER AIRCRAFT, INC.
PA-46-350P, MALIBU MIRAGE
MAINTENANCE MANUAL
DISTRIBUTION
The cabin air distribution system consists of left and right side panel ducting, windshield defrost, foot warmer
(if installed) and ventilation blowers. The side panel ducts provide for overall air distribution throughout the
length of the cabin as well as individual controllable air outlets at each seat (eyeball outlets). The defrost
control will allow part of the bleed air to be diverted to the windshield defrost outlet. Separate and individual
controls for the two foot warmer outlets (if installed) are also provided. The outlets are located between the
rudder pedals on each side of the cockpit. The ventilation blowers supply airflow to the portion of the sidewall
ducts containing the individual seat outlets (eyeballs).
Cabin ventilating air, for ground and unpressurized flight operation, is supplied from the ambient air source to
the bleed air heat exchanger through a ram air selector valve and check valve. This will supplement air flow
primarily in ground operation. This air source is capable of being heated by mixing with hot air from the
exhaust shroud.
1. Ground Blower
A vane-axial ground blower is installed in the left duct below the forward baggage compartment floor.
This blower supplements air flow during ground operation. Flapper-type check valves are located at the
forward pressure bulkhead.
A. Removal
(1) Loosen the two clamps that secure the flexible adapter ducts to the blower.
(2) Loosen the two clamps that secure the flexible adapter ducts to the inlet and outlet ducts.
(3) Slide the aft flexible adapter duct rearward over the outlet duct.
(4) Disconnect the electrical leads from the blower.
(5) Slide the blower aft and down to remove it.
B. Installation
(1) Position blower in place, ensuring that the airflow arrow is pointing aft.
(2) Slide the aft flexible adapter duct forward onto blower and secure it with the clamp.
(3) Secure the forward flexible adapter duct to the blower with the clamp.
(4) Tighten clamps that secure the flexible adapter ducts to the inlet outlet ducts.
(5) Connect leads from the blower.
2. Cabin Recirculation Blowers
The left and right cabin recirculation blowers are beneath the rear baggage compartment floor between
F.S. 233.87 and F.S. 241.50.
A. Removal
(1) Remove the rear seats, the rear baggage compartment carpet, and the two large access
panels in the rear baggage compartment floor.
(2) Disconnect the duct from the outboard side of the blower.
(3) Disconnect the electrical lead going to the blower motor.
(4) Remove the bolts, nuts and washers that attach the blower to the evaporator shell.
(5) Remove the blower from its cavity.
B. Installation
(1) Position the blower in place on the evaporator shell and secure it with the bolts, nuts and
washers.
(2) Connect the electrical leads going to the blower motor. (See Chapter 91 for electrical schematic.)