Data Acquisition Unit (Dau); Magnetic Heading Systems - Piper Malibu Meridian PA-46-500TP Airplane Maintenance Manual

(3) Data Acquisition Unit (DAU)

(a) The DAU installed with the Avidyne Entegra EFIS is the same unit used in the Meggitt
EFIS installation. Maintenance is on condition. Configuration/calibration procedures are in
28-40-00 and 77-10-00.
(b) Removal and Installation
The DAU is mounted underneath the instrument panel on the right aft side of the forward
pressure bulkhead (F.S. 100.00) (see Figure 2).
(4) Mini-Data Acquisition Unit (DAU)
(a) The mini-DAU provides the MFD with the data required to populate the Electrical and
Rudder Trim sections of the MFD Engine Page display. Maintenance is on condition only.
(b) Removal and Installation
The mini-DAU is mounted on the right side of the upper aft equipment shelf at F.S. 265.80
(see Figure 2). Remove the rear seats (if desired) and aft cabin closeout panel for access.
(5) Magnetometer/OAT Sensor Assembly
See information under Primary Flight Display, above. Removal and installation instructions are
provided under "Magnetic Heading Systems, Avidyne Entegra EFIS Installation," below.
C. Component Locator
See Figures 2 and 5.
4.

Magnetic Heading Systems

A. Meggitt EFIS Installation
(1) Flux Detectors (See Figure 3.)
Two flux detectors are used to provide heading data to the ADAHRS. They are installed in the
leading edge of the vertical fin.
CAUTION: PERFORM MAGNETIC HEADING COMPENSATION / CALIBRATION, BELOW,
(a) Removal
1
2
3
(b) Installation
CAUTION:THE FLUX DETECTORS ARE SECURED TO THE MOUNTING BRACKET
1
2
3
4
34-20-00
PAGE 24
Apr 15/07
PIPER AIRCRAFT, INC.
PA-46-500TP, MALIBU MERIDIAN
MAINTENANCE MANUAL
WHENEVER A FLUX DETECTOR IS CHANGED.
Remove the dorsal fairing to expose the flux detectors.
Disconnect the wiring harness(es) from the top of the flux detector(s) to be removed.
Unscrew and remove the three brass screws and washers and remove the flux
detector.
WITH BRASS SCREWS. ENSURE ONLY BRASS SCREWS ARE USED
WHEN REINSTALLING.
Place the flux detector into position on its mounting bracket and secure with brass
screws and washers (3 ea.)
Connect wiring harness to the connector on top of the flux detector.
Seal the connector backshell and base (see Figure 3, view A) with DOW Corning 4
Electrical Insulating Compound.
Reinstall the dorsal fairing.
NOTE: Ensure correct hardware is used when reinstalling vertical fin dorsal fairing
over flux detector.
5D18