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

Page: 1461 / 1956

PAGE 3
Feb 28/07 7H15
77-20-00
PIPER AIRCRAFT, INC.
PA-46-350P, MALIBU MIRAGE
MAINTENANCE MANUAL
T.I.T. Probe Installation
Figure 1
100546 U
PROBE ASSY
1.42
1.36
(REF)
VIEW A-A
CABLE TIE,
HIGH TEMP.,
(4 PLACES)
SLEEVE (2 REQ)
LEAD ASSY
ENCLOSE TERMINAL WITH
3M 27 GLASS CLOTH ELECTRICAL TAPE
(+) YELLOW
(-) RED
A
A
CAUTION: TO AVOID ERRONEOUS INDICATIONS, DO NOT USE ANY ADDITIONAL
WIRING BETWEEN THE MILLIVOLT POWER SUPPLY AND THE T.I.T. WIRING
HARNESS EXCEPT AS SHOWN IN FIGURE 2.
(3) Connect a stable millivolt power supply directly to the T.I.T. wiring harness. It should be noted
that the yellow harness wire is “positive.”
NOTE: If a millivolt power supply is not available, it is permissible to construct the circuit
shown in Figure 2 and connect this circuit to the aircraft battery as shown in Figure 3.
(4) Once this calibration configuration is established, allow the aircraft to remain in the hanger for
at least 3 hours for the system temperature to stabilize.
CAUTION: DO NOT TOUCH THE CONTACTS ON THE BACK OF THE T.I.T. INDICATOR
WITH YOUR HANDS. IF CONTACT IS MADE, ALLOW THE SYSTEM TO
STABILIZE FOR AT LEAST ONE HOUR BEFORE MAKING THE ADJUSTMENT
TO THE INDICATOR.
(5) Gain access to the back of the T.I.T. indicator. (Remove the glareshield if necessary.)
(6) Adjust the variable D.C. millivolt power supply so the input voltage to the T.I.T. harness is
37.1 ± .1 m.v. It should be noted that this value does not correspond to the standard Alumel-
Chromel Tables for “K”- Type thermocouples due to the electrical load of the harness and
indicator.