Northern Airborne Technology AA83-100 - Manual (Page 13)

SM10 Rev. 4.10 AA31 ICS Mode Controller Manual
2.3.6 Post-Installation Checks
If any preset requires adjustment, be sure this is carried out before the aircraft leaves,
and that the unit and its mating connector are secured before departure. Make all
required log book entries, electrical load, weight and balance amendments and other
paperwork as required by your local regulatory agency.
2.3.6.1
Voltage/Resistance Checks
Do not attach the AA31 until the following conditions are met.
Check the following:
a) P101
pin <1> for +28 Vdc relative to ground.
b) P101 pin <14> for continuity to ground (less than 0.5 Ω).
In an Intercom System with four Audio Controllers, check for continuity between
Terminations 1, 2 and 3. Pins <7> to <19>, Pins <8> to <20>, and Pins <9> to <21>
should measure less than 1
Ω.
2.3.6.
2 Power On Checks
Power up the audio system with the AA31 installed. Verify that the ISO (amber) and
COMMON (green) LEDs light as the ICS Function Knob is rotated from the ALL
COMMON position to the ISOlated positions.
Verify that the ICS Function Outputs are correctly driving their external annunciators, if
installed.
Ensure that the REAR CALL annunciators on the front panel of the AA31 are operating
correctly if external switches for this function are installed.
Check that turning on the panel lights will backlight the AA31 faceplate and will dim the
faceplate annunciators.
Verify that ICS Audio is being switched between Audio Controllers as the ICS Function
Knob is rotated. Ensure that the ICS Audio level is consistent at each Audio Controller
as the ICS function knob is rotated.
Upon satisfactory completion of all performance checks, make the required log
entries and complete the necessary Regulatory Agency paperwork before
releasing the aircraft for service.
2.4 Continued Airworthiness
Maintenance of the AA31 is ‘on condition’ only. Periodic maintenance of this product is
not required.
Feb 4, 2005 Page 2-3
ENG-FORM: 805-0107.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.