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

Page: 1455 / 1956

PAGE 1
Feb 28/07 7H9
77-10-00
PIPER AIRCRAFT, INC.
PA-46-350P, MALIBU MIRAGE
MAINTENANCE MANUAL
POWER
NOTE: In S/N’s 4636375 and up, engine data is collected by the Data Acquisition Unit (DAU) and is
displayed on the Multi-Function Display (MFD) and Primary Flight Display (PFD). See Electronic
Flight Instrument System, 34-20-00; 77-40-00, and 91-77-40 for more information
.
Manifold Pressure Gauge
NOTE: Serial numbers 4636021 thru 4636374 incorporate the Transicoil Electronic Module Instrument
System (EMIS). See 77-40-00.
A. Description
The manifold pressure gauge is a vapor proof, absolute pressure type instrument. Pressure from
the intake manifold of the engine is transmitted to the instrument through a line. A pointer indicates
the manifold pressure available at the engine in inches of mercury. A manual drain is provided in the
line. The drain line leads from a tee on the back of the manifold air pressure gauge to the drain
which is mounted forward of the elevator trim wheel on the left hand side.
B. Troubleshooting
See Chart 1.
Trouble Cause Remedy
Excessive error at existing Pointer shifted. Replace instruments.
barometric pressure.
Excessive error when engine Line leaking. Tighten line connections.
is running.
Sluggish or jerky pointer Defective instrument. Replace instrument.
movement.
Dull or discolored marking. Age. Replacement instrument.
Incorrect reading. Moisture or oil in line. Disconnect lines and blow
out.
CHART 1
TROUBLESHOOTING MANIFOLD PRESSURE GAUGE