3 - 24 Operation
K0260 Issue No. 8
3.8 Manual Venting of the Aircraft Pitot and Static Systems
This procedure should be carried out when the power supply has failed and the ADTS 505 has
failed-safe with pressures remaining in the aircraft system. The aircraft system pressures must be
slowly changed to atmospheric pressure in the following way:
CAUTION:
1THE AIRCRAFT INSTRUMENTS MUST BE MONITORED THROUGHOUT MANUAL VENTING. DO NOT EXCEED THE
MAXIMUM RATES OF CHANGE OF PRESSURES FOR THE INSTRUMENTS IN THE AIRCRAFT SYSTEM. REFER TO
THE AIRCRAFT MAINTENANCE MANUAL.
2
F
OLLOW
THIS
PROCEDURE
;
DO
NOT
PRODUCE
A
NEGATIVE
AIRSPEED
THIS
WILL
DAMAGE
AIRCRAFT
INSTRUMENTS
.
i. Using a screwdriver, carefully open the Qc manual vent and allow the pressure in the pitot
(Pt) and static (Ps) systems to equalise (shown on the aircraft ASI). Fully open the Qc valve.
ii. Using a screwdriver, carefully open the Ps manual vent do not exceed a rate of 3000 ft/min.
iii. When the indicated pressures, shown on the aircraft instruments, reaches atmospheric
pressure close both vents.
3.9 ADTS 505 Options
Hand Terminal Option A
The hand terminal provides the same selections and displays as the front panel display. When
connected the system auto-detects the hand terminal and disables the front panel key-pad.
The front panel display shows "Remote Hand Terminal Operating" (message/monitor) or the current
values and modes of the hand terminal (monitor). The display menu in set-up provides the selection
between message and monitor.
Advanced Hand Terminal Option B
CAUTION:
O
NLY USE THIS ADVANCED HAND TERMINAL WITH ADTS 505 UNITS AT MODIFICATION STATE 3,
DAMAGE WILL OCCUR TO ADTS 505 UNITS AT EARLIER MODIFICATION STATES.
• During the early power-up, self-test period, the instrument display screen shows:
”Software Version 1.07+”
This text is located just above the last calibration date entry.
The advanced hand terminal provides a Windows®-based, touch-sensitive colour screen to up-
load and down-load user-defined test programs. When connected, the system auto-detects the
advanced hand terminal and disables the front panel key-pad. The front panel display shows
"Remote Hand Terminal Operating" (message/monitor) or the current values and modes of the
advanced hand terminal (monitor). At power-up, the display shows the main operation menu with
selections for system set-up, test sequence files and manual control. See 6.4 for the details and
procedures for the advanced hand terminal.
If the ADTS 505 unit is not at the correct modification state, contact the local GE Sensing sales team
to arrange for a free upgrade of your unit.
www.ge-mcs.com
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