Service difficulty report · Signal Cond Unit

Difficulty date
January 9, 2015
Submitted
March 12, 2015
Operation
General aviation
Engine
Pwa PW123
Part
Signal Cond Unit
Part number
30005000046
Condition
Malfunctioned
Location
Torque
Stage of operation
NR
How discovered
9
Nature of condition
O
Precautionary procedure
O

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

What was found

(CAN) A TORQUE SIGNAL CONDITIONER (TSCU) WAS RECEIVED WITH FILTERS WITH DIFFERENT APPEARANCE THAT MIGHT SUGGEST THAT UNRECOGNIZED DETAIL PARTS ARE IN THE UNIT. FINDINGS: AS YOU CAN SEE ABOVE, A UNIT IS SUPPOSED TO BE RECEIVED WITH 13 FILTERS. THESE FILTERS USUALLY HAVE A BLACK EPOXY RING ON ONE SIDE. BUT ON THE UNIT WE RECEIVED, THERE WERE 5 OUT OF THE 13 FILTERS THAT HAD RED EPOXY. CONSIDERING THAT THE UNIT OEM CONFIRMS THAT THERE IS ONE APPROVED SUPPLIER FOR THIS MODEL OF EMI FILTER AND THIS SUPPLIER DID NOT MANUFACTURE THEM, WE CAN CONCLUDE THAT THE EMI FILTERS RECEIVED ARE MANUFACTURED BY A SOURCE NOT APPROVED BY THE OEM.