Engine Torque - Avidyne Efis - Piper Malibu Meridian PA-46-500TP Airplane Maintenance Manual

(p) Verify that the Torque reading on the EDU reads 1200 ± 10 LBS-FT.
(q) Referring to Chart 1 and using the calibrated pressure source, apply the pressure
corresponding to 1320 LBS-FT of torque to the torque transducer.
(r) Verify that the Torque reading on the EDU reads 1320 ± 10 LBS-FT.
(s) Full range check of the engine torque indication is completed, turn aircraft power off.
2.

Engine Torque - Avidyne EFIS -

In S/N's 4697198, 4697216 and up, when the Avidyne FlightMax Entegra EFIS is installed,
engine instrumentation is provided in the Primary Flight Display (PFD). Detailed engine information is
provided on the engine page of the Multi-Function Display (MFD).
A. Description
The engine torque indicating system consists of a torque pressure transducer at the propeller
reduction gearbox, the Primary Flight Display (PFD), the Multi-Function Display (MFD), and the
Data Acquisition Unit (DAU).
Torque and ITT data are provided in the Primary Flight Display (PFD). Torque, ITT, Np, Ng, Oil
Temperature, and Oil pressure data are provided on the engine page of the Multi-Function Display
(MFD). The Data Acquisition Unit (DAU) collects and processes the raw sensor input and provides a
refined data stream to the PFD and MFD which actually display the data.
B. Engine Torque Indication Calibration
During calibration, switches on the bottom of the DAU are manipulated to select which phase of the
calibration process is being performed. All data relating to calibration is displayed on the MFD.
NOTE: The DAU is located on the right aft side of the forward pressurization bulkhead and is
accessed by reaching under the instrument panel on the right side.
(1) Requirements
(a) Calibrate whenever a DAU is replaced.
(b) Calibrate whenever a torque pressure transducer is replaced.
(2) Procedure
CAUTION: DO NOT PERFORM TORQUE CALIBRATION WHEN THE ENGINE IS HOT. LET
(a) Turn ON the Multi-Function Display (MFD). Select the "AUX" page using the outer right
knob. Enter Maintenance Mode by pressing buttons "L1" and "L3" simultaneously. When in
the maintenance mode, depress and release the "Engine Setup" button. Verify the Engine
Instruments Setup Page appears on the MFD and the 2nd bezel button from the top on
the left side is labeled "Torque Cal" (See Figure 6).
(b) Depress and release the "Torque Cal" button. Verify the "DAU Torque Calibration" page
appears on the MFD (See Figure 7).
(c) Pull both "DATA ACQUISITION" circuit breakers.
(d) Hold the SW-3 and SW-4 toggle switches on the DAU to either the "MIN MAX" or the
"CAL" position (See Figure 3). Push in both "DATA ACQUISITION" circuit breakers and
keep holding the SW-3 and SW-4 toggle switches for a minimum of 5 seconds.
77-10-00
PAGE 6
Apr 15/07
PIPER AIRCRAFT, INC.
PA-46-500TP, MALIBU MERIDIAN
MAINTENANCE MANUAL
THE ENGINE COOL DOWN FOR A MINIMUM OF ONE (1) HOUR PRIOR TO
PERFORMING TORQUE CALIBRATION.
primary
(PIR-PPS60185, Rev. E.)
7I18