Service difficulty report · Wire · Bell 412EP

Difficulty date
May 10, 2018
Submitted
August 18, 2020
Operation
General aviation
Make and model
Bell 412EP
Aircraft time
640 hours
Engine
Pwa PT6T6
Part
Wire
Condition
Chafed
Location
Main Rotor
Part time
352 hours
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) PART NUMBERS: D38999/26WA98SN AND 30-269-1P09N05 WIRING THROUGH EMI CONNECTOR CONTACTS AND CHAFES ON BACKSHELL 90 DEGREE BEND AND SHORTS TO GROUND GIVING ERRONEOUS CREW ALERTING SYSTEM MESSAGES. IN THIS CASE IT WAS ON THE TRANSMISSION FULL FLOW DEBRIS MONITOR. OTHER INCIDENTS HAVE INVOLVED THE SAME CONNECTOR AND BACKSHELL ON THE 90 AND 42 DEGREE GEARBOX CHIP DETECTORS. (TC# 20180510007)

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