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

Page: 938 / 1956

PAGE 10
Feb 28/07
5C20
34-10-00
PIPER AIRCRAFT, INC.
PA-46-350P, MALIBU MIRAGE
MAINTENANCE MANUAL
4. Altimeter
The altimeter uses pressure differential to indicate altitude in feet. When the barometric pressure scale
on the instrument is set to the current altimeter setting, the altimeter will indicate altitude, in feet, above
sea level. The indicator has three pointers and a dial scale; the long pointer is read in hundreds of feet,
the middle pointer in thousands of feet and the short pointer in tens of thousands of feet. A window in the
lower center of the dial face contains a "barber pole" design to show when the airplane is below 10,000
feet. As the airplane climbs, the barber pole design progressively disappears until, when at or above
10,000 feet, the window is blank. The barometric pressure window, located on the right side of the
indicator dial, is set by the knob located on the lower left corner of the instrument. The altimeter consists
of a sealed aneroid (diaphragm) that is connected to the pointers through a mechanical linkage. The
instrument case is vented to the static air system and as static air pressure decreases, the aneroid
expands, causing the pointers to move through the mechanical linkage.
NOTE: If any connections in the static system are opened for maintenance, the entire system must be
rechecked per FAR 23.1325. With optional Meggitt EFIS installation, see Appendix 1 (grid 5K19).
A. Troubleshooting
See Chart 3.
B. Removal and Installation
See 39-10-00, Face Mounted Instruments - Removal and Installation.