Independent third-party repair of the hardware behind simulator control feel: Moog rotary loaders and Brunner CLS-E electric drives on yoke, rudder, and throttle force-feedback loops, plus legacy hydraulic servo valves on older training systems.
Component-level repair on control-loading hardware
Same shop, two technologies. Electric drives and hydraulic servo valves both come through the bench. Component-level rebuild and verification on the same hydraulic and electronic stands.
N210
Electric drive rebuild
Power stage, gate driver, DC bus capacitor, and IGBT replacement on Moog rotary loaders and Brunner CLS-E drives.
N220
Servo drive mechanical work
Bearings, encoders, and winding repair on the brushless servo units used in electric force-feedback systems.
N230
Hydraulic valve repair
Spool, sleeve, pilot stage, and torque motor work on Moog, Parker, and Rexroth servo valves on legacy control loaders.
N240
Bench testing
Hydraulic test stands for valve verification and electronic test setups for drive and servo unit performance characterization.
N250
Donor parts service
Stock is hit or miss, but legacy electric drives and discontinued hydraulic loaders show up often enough that we can pull from past jobs when we have a match. Ask about a specific part number.
N260
Repair scope
Hardware repair only. PLC programming, control-feel tuning, and simulator qualification stay with the customer or training-center integrator.
Control loading systems run continuously through every training session. Failures fall into four categories across the electric and hydraulic technologies seen at the bench. Recognize one? A part number is enough to start.
Failed IGBTs, blown DC bus capacitors, gate driver damage on electric loaders. Often follows a power-event or cooling-fan failure on the simulator cabinet.
Mechanical wear
Worn bearings on brushless servo units, encoder damage from wiring strain, and winding insulation faults after extended service.
Hydraulic servo valve
Spool wear, contamination scoring, pilot-stage null shift, and torque motor coil damage on legacy hydraulic loaders.
Connector and cabling
Damaged connectors at the pilot input, cable strain at the entry point, and contamination on the connector pins after years of cockpit-area service.
N500 Workflow
From part number to ship-back
Same four-step path through the shop whether the unit came off a CAE Type D simulator or a Brunner CLS-E retrofit on a regional trainer.
N510
Get in touch
Call or email with the part number, simulator make, and a photo of the nameplate if it helps.
N520
Bench review
Tech inspects the drive or valve and runs it on the appropriate stand to confirm what failed.
N530
Cost & approval
We call back with the cost and a rough turnaround. Nothing is started without your sign-off.
N540
Repair, test, ship
Failed components replaced from inventory or off donors, the unit verified under load, and shipped back.
N600 Common questions
Common questions about control loading repair
Application-specific questions. For brand-specific FAQs, see the dedicated brand page in the brand list above.
What types of control loading systems do you repair?
Electric servo drives used in modern systems (Moog rotary loaders, Brunner CLS-E, custom Parker / Kollmorgen integrations) and hydraulic servo valves used in legacy systems (Moog, Parker D1FP, Rexroth 4WS). All come off the bench for rebuild.
Do you work on Brunner CLS-E electric loaders?
Yes. Brunner CLS-E MK II, NG, and the related Brunner servo drives come through the bench for component-level work on the drive electronics, bearings, encoders, and windings.
What about Moog rotary loaders and FCS-2000 / FCS-5000?
Yes. Moog rotary loaders and the Moog FCS series are covered. Drive electronics, mechanical work on the servo unit, and feedback channels all come through the bench. Refer to the Moog brand page for the broader Moog hardware list.
Can you repair legacy hydraulic control loaders?
Yes. Older simulators that use hydraulic actuators with Moog, Parker, or Rexroth servo valves for force feedback are common at the bench. The valve side runs through the same hydraulic stands as the rest of the aerospace work.
Do you provide control-feel tuning or simulator parameter setup?
No. NC Servo handles bench-level component repair on the hardware only. Control-feel tuning, motion-cue parameter setup, and simulator qualification stay with the customer or training-center integrator.
What is the warranty?
One year on parts and workmanship for repairs and rebuilt units. Standard exclusions apply for power surges, contamination, improper installation, and out-of-spec operation.
N700 More from NC Servo
Related repair coverage
The aerospace hub, the related simulator pages, and the brand pages most-tied to control loading systems.
Give us a call or send a part number with the simulator make and the symptom. We'll check the donor pool, suggest a rebuilt match if we have one, and walk through repair or cross-brand options if we don't.
