Northern Airborne Technology VR28 - Manual (Page 12)

VR28-013 Voltage Regulator Manual SM32 Rev. 4.00
2.3.4 Post-Installation
Checks
2.3.4.1 Voltage/resistance checks
Do not attach the VR28 until the following conditions are met.
Check the following:
a)
Check harness pins <1> <2> and <9> for +28 Vdc relative to ground.
b) Check pins <4> <11> and <12> for continuity to ground (less than 0.5 Ω).
c) Ensure +13 Vdc lines pins <6>, <7> and <14> are not shorted to ground.
2.3.4.2
Power On checks
Power up the aircraft's system with the VR28 installed, and confirm that the unit is
operating properly and the Power Output LED is on.
Double check that the mounting and connector hardware is tightened securely.
Upon satisfactory completion of all performance checks, make the required log
entries and complete the necessary MOT/FAA paperwork before releasing the
aircraft for service.
2.4 Continued Airworthiness
Maintenance of the VR28 is ‘on condition’ only. Periodic maintenance of this product is
not required.
2.5 Accessories Required But Not Supplied
Installation kit p/n VR28-IKC (crimp) or VR28-IKS (solder) is required to complete the
installation. They consist of the following:
VR28-IKC 15-pin D-min Female Crimp Kit (NAT Part No. D15SL-IKC)
Quantity Description NAT Part #
1
D-min 15 Socket Housing 20-21-015
15 MS Crimp Socket 20-26-901
1* Jack Screw Set 20-27-002
1* Lock Clip Set 20-27-004
1 15 Pin Connector Hood 20-29-015
* Use as required.
Page 2-2 Nov 10, 2003
ENG-FORM: 805-0105.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.