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

Page: 1409 / 1956

PAGE 1
Feb 28/07 7F11
74-10-00
PIPER AIRCRAFT, INC.
PA-46-350P, MALIBU MIRAGE
MAINTENANCE MANUAL
ELECTRICAL POWER SUPPLY
1. Ignition System
A. Description
Ignition of the fuel charge in each cylinder is accomplished by two spark plugs independently
excited by one of two Slick magnetos. Each magneto separately generates, times and distributes
high tension (voltage) through leads to each cylinder. Both magnetos are pressurized by turbo
compressor bleed air taken from the induction duct downstream from the right intercooler through
an in-line filter to improve magneto efficiency at altitude.
The magnetos are controlled by two switches on the pilot’s instrument panel. With the switch OFF,
the magneto is grounded and will not produce spark. The right magneto fires the lower left and
upper right spark plugs. The left magneto fires the lower right and upper left spark plugs.
The right magneto is standard and the left magneto is a retard breaker type with a fixed retard and
long duration boosted spark for starting. A DC power source and a remote starting vibrator are
required for operation. The magnetos incorporate an integral feed-through capacitor. The retarded
magneto must have the right or standard magneto grounded during the starting cycle.
B. Troubleshooting
See Chart 1.
C. Replacement Magnetos
NOTE: Check the magneto dataplate to verify the specific model number and series of the
magneto being worked on.
D. Overhaul
Overhaul is required as conditions indicate, but in no case may Slick 6300 series magnetos time-in-
service exceed the TBO for the engine. Magnetos must also be overhauled after a lightning strike or
following a sudden engine stoppage.
NOTE: An alternative to overhaul is complete magneto replacement with a new Slick magneto.
New Slick magnetos incorporate all the latest design features and may be a cost effective
alternative to overhaul.
Information provided in this section is intended to support magneto removal, cleaning, inspection,
replacement and timing. For magneto overhaul procedures, see Slick’s F-1100 Master Service
Manual, available from:
Slick Aircraft Products
(See Introduction, Supplementary Publications, Vendor Publications, Magnetos.)
2. Magnetos (See Figure 4.)
A. 100 Hour Inspection
Every 100 hours or at annual inspection, whichever comes first, perform the following checks.
WARNING: BE SURE IGNITION SWITCH IS IN THE “OFF” POSITION AND THE CONDENSER
P-LEAD IS GROUNDED.
(1) Adjust timing to engine. (See Figure 1.)
(a) Turn the engine crankshaft in the normal direction of rotation until the No. 1 cylinder is in
the full-advance firing position.
1 Cover spark plug hole of number one cylinder with thumb. Rotate crankshaft until
pressure is felt on thumb.