R (Ref. Fig. 502/TASK 20-28-00-991-037)
R (6) Remove the test equipment.
R 5. Close-up________
R Subtask 20-28-00-942-114
R A. Close Access
R (1) Make sure that the work area is clean and clear of tool(s) and other
R items.
R Measurement Points on Different Panels Figure 502/TASK 20-28-00-991-037
1EFF : 1 1 1CES ALL 1 111 20-28-00 Page 539 May 01/99
TASK 20-28-00-720-012
R Check of the Aircraft Electrical Grounding
1. Reason for the Job__________________
Self Explanatory
2. Job Set-up Information______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
R No specific No specific metal plate Megohmmeter - 10 Megohms - 500 Volts - 1 mA (max.)
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
20-28-00-869-002 Table of the Maximum Permitted Resistance Values
3. Job Set-up__________
Subtask 20-28-00-420-091
R A. Equipment
R R (1) Megohmmeter - 10 Megohms - 500 Volts - 1 mA (max.), with the related leads and prods.
R R (2) A metal plate.
4. Procedure
_________
Subtask 20-28-00-210-064
A. Measurement of the Resistance Value
(1)
Put the metal plate between the tires of the nose landing gear and the ground.
(2)
Measure the resistance between the plate and the nose gear leg with the megohmmeter.
NOTE : This procedure is easier if you make the tire/plate contact
____
moist.
(3)
Make sure that the measured values are not higher than the maximum permitted values (Ref. TASK 20-28-00-869-002).
(4)
Remove the test equipment.
5. Close-up
________ Subtask 20-28-00-942-101
A. Close Access
(1) Make sure that the work area is clean and clear of tool(s) and other items.
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TASK 20-28-00-720-014
R Loop Impedance Test
1. Reason for the Job__________________
Self Explanatory
2. Job Set-up Information______________________
A. Fixtures, Tools, Test and Support Equipment
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