Northern Airborne Technology VR33-001 - Manual (Page 7)

VR33 Series DC Power Converter Manual SM47 Rev. 4.00
2.3.3
Post-Installation Checks
2.3.3.1 Voltage/resistance checks
Do not attach the VR33 to the PA250 or PA700 until the following conditions are
met.
Check the following (one connector for VR33-001, two for VR33-002):
a) Check J5 and J6 pin <B> for continuity to ground (less than 0.5 Ω).
b) Check P6 (aircraft power connector) pin <A> for +28 Vdc relative to ground.
c) Install P6 to J6 (VR33 connector), and then check J5 (PA connector) <A> for
+33 Vdc relative to ground.
2.3.3.2
Power On checks
Install the VR33 and power up the system. Verify normal operation of all functions with
reference to all system components.
Note: To verify proper operation, all functions and levels should be checked in-flight (if
appropriate).
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 VR33 is ‘on condition’ only. Periodic maintenance of this product is
not required.
2.5 Installation Drawings
DRAWING REV. DESCRIPTION TYPE
VR33-001
VR33\001\922-0 1.01 DC Power Converter Mechanical Installation
VR33-002
VR33\00 2 \922-0 1.00 DC Power Converter Mechanical Installation
Section 2 ends after these Drawings
Page 2-2 Nov 16, 2005
ENG-FORM: 805-0109.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.