Service difficulty report · Relay · Grob G120A

Difficulty date
December 9, 2002
Submitted
January 27, 2003
Operation
General aviation
Make and model
Grob G120A
Part
Relay
Part number
120A9491105AV
Part serial
0139010
Condition
Shorted
Location
Hyd System
Stage of operation
IN
How discovered
V
Nature of condition
O
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

DURING PROGRESSIVE INSPECTION AND CYCLE OF THE LANDING GEAR WE HAD A FAILURE OCCURED. FOUND A BAD HYDRAULIC CONTROL RELAY THAT SHORTED. BECAUSE OF THAT SHORT, IT ALLOW TO MUCH CURRENT TO FLOW TO PC BOARD AND SHORT OUT BOARD BETWEEN RELAY K13 PIN 13 AND 16 TO BOARD PIN 6, RECOMMEND THAT SOME TYPE OF CIRCUIT PROTECTION BE PLACED BEFORE BOARD TO PROTECT FROM POWER SPIKES. PART NEW OUT OF STOCK.

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