Northern Airborne Technology 3110 - Manual (Page 26)

3110-100 Audio Control Panel Manual SM3110 Rev. 4.00
2.3.5.7
CVR Intelligibility Check
The CVR output from the 3110 contains a mix of the Pilot headphones audio and the hot
mic audio. The audio level of the Pilot headphone audio on the CVR output will vary with
the volume control settings on the 3110, therefore when conducting a CVR intelligibility
check, set all of the 3110 volume controls to their nominal 2 o'clock positions.
2.3.6 Post-Installation Checks
2.3.6.1 Voltage/Resistance Checks
Check the following:
a) P1 pin <21> <4> and <5> for +28 Vdc avionics buss voltage.
b) P1 pin <99> for +28 Vdc annunciator buss voltage.
c) P1 pin <30> for +5 Vdc lighting buss voltage.
d) P1 pin <62> for +28 Vdc if indicator lamp is connected.
e) P1 pins <74> and <75> for continuity to ground (Power).
f) P1 pins <41> <52> <55> <61> <64> <73> <76> and <77> for continuity to
ground when the appropriate switches are closed.
2.3.6.2 Power On Checks
a) Install the 3110-100 and power up the aircraft’s systems. Turn on the radios and
accessories required for the system.
b) Check for correct radio audio and adjust for acceptable level.
c) Run through all installed functions, and check the RX and TX functions for all
users. Refer to Section 3 for specific operation details.
d) 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.
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 3110-100 is ‘on condition’ only. Periodic maintenance of this product
is not required.
Page 2-4 Aug 25, 2005
ENG-FORM: 805-0107.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.