What was found
SERVO LOCKED UP 4 TIMES ON FUNCTIONAL CHECK ON HYD BENCH. FOUND PLASMA COATING BROKE OFF SYS 1 AND 2 PISTONS. PLASMA WAS FOUND IN BOTH SYS BYPASS SPOOL, SLEEVES, AND PRIMARY CONTROL VALVES.
- Difficulty date
- March 22, 2012
- Submitted
- March 22, 2012
- Operation
- Air carrier
- Aircraft
- N519AL
- Make and model
- Skrsky S76A
- Aircraft serial
- 760058
- Aircraft time
- 13,623 hours
- Engine
- Allsn 250C30
- System (JASC)
- 6700 · Rotorcraft Flight Control
- Part
- Piston
- Part number
- 41012001
- Part serial
- AP40146
- Condition
- Eroded
- Location
- Zone 200
- Part time
- 1,053 hours
- Component
- Servo · Skrsky
- Component part number
- 7665009805111
- Stage of operation
- IN
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.