High-Precision Electronics & Electrical Manufacturing
AM&RS and MAYU381 LLC engineer high-speed multi-layer PCBs, fabricate MIL-SPEC EWIS wiring harnesses, test, and deliver mission-critical avionic systems with flight-ready precision and full traceability.
Structured support from review to flight-ready manufacturing.
High-speed SI/PI electrical checks, high-pot insulation resistance & thermal screening.
IPC Class 3 build packages, AS50881 EWIS records, pinouts & 3D CAD files.
DO-254 & MIL-STD-810 preparation with rapid on-site flight-line rectification.
About Our Strategic Alliance
Aerospace Precision & Defense Engineering Excellence
AM&RS (SMC-PRIVATE) LIMITED and MAYU381 LLC (Sheridan, WY, USA) operate in a unified commercial and engineering partnership, delivering high-reliability avionics modifications, aerospace wire loom manufacturing, advanced multi-layer PCB prototyping, and flight-line defect isolation.
Our facilities combine ISO/IEC cleanrooms, automated Schleuniger wire-processing lines, Cirris high-pot dielectric harness testers, and advanced CAD/CAM software to ensure every product conforms strictly to MIL-W-22759, MIL-STD-810, and IPC-6012 Class 3.
PROVEN TECHNICAL CAPABILITIES
Certified flight-critical manufacturing metrics:
Our Engineering Services
End-to-End Aerospace Divisions
Comprehensive design, fabrication, assembly, and defect rectification capabilities tailored for mission-critical aircraft, defense platforms, and commercial electronics.
Aerospace PCB Design
High-speed multi-layer PCB design (up to 32+ layers), rigid-flex boards, impedance-controlled routing, signal/power integrity (SI/PI) simulation, and rapid PCBA prototyping compliant with IPC-6012 Class 3 and DO-254.
EWIS Harness Assembly
Turnkey aircraft electrical wiring interconnect systems (EWIS) following AS50881. MIL-W-22759 wire stranding, Raychem DR-25 heat shrink sleeving, braided Nomex/metal EMI/RFI shielding, and UV laser wire marking.
Mil-Spec Connectors
Precision integration of MIL-DTL-38999 (Series I–IV), MIL-DTL-26482, and micro-D subminiature circular connectors. Hermetic glass-to-metal sealing, environmental backshell potting, and high-pot dielectric testing.
Relay Box & LRU Units
Custom line-replaceable relay boxes, primary/secondary power distribution panels, solid-state switching matrices, and bus power transfer units operating on 28 VDC and 115 VAC 400Hz systems under MIL-STD-704.
Avionics Retrofits
Cockpit modernization, glass display upgrades, navigation/communication bus retrofits (MIL-STD-1553, ARINC 429), engineering change order (ECO) implementation, and STC certification harness design.
Defect Rectification & AOG
Rapid on-site flight line defect diagnosis using Time-Domain Reflectometry (TDR) for intermittent wire breaks, high-resistance crimps, relay chatter, and immediate FAA/military standard aircraft rectification.
Platform Solutions
Engineered for High-Reliability Sectors
Delivering qualified electrical and avionic hardware across diverse defense and commercial operational environments.
Military Airframes
Fighter jet, transport aircraft, and rotary-wing EWIS looms, weapons release harnesses, and cockpit power management LRUs built to MIL-STD-810 environmental extremes.
Civil & Commercial Aviation
FAA/EASA compliant cabin entertainment wiring, flight control surface harnesses, auxiliary power unit (APU) cable assemblies, and fast-turnaround AOG repair kits.
UAV & Autonomous Systems
Ultra-lightweight miniature wire looms, high-density rigid-flex avionics PCBs, telemetry harnesses, and brushless motor power distribution controllers.
Diagnostic Simulation
28 VDC Bus & Relay Simulator
Interactive electrical schematic simulator demonstrating relay box switching, circuit breaker protection, and live current distribution.
Specification Builder
EWIS & PCB Configurator
Configure custom military or civil aerospace electrical specifications and generate instant part numbers for direct technical dispatch.
Join Our Team
Aerospace Careers
Join a forward-looking team of avionics designers, EWIS specialists, and quality engineers working on next-generation aerospace defense programs.
Senior EWIS Harness Engineer
Lead custom aircraft wiring harness design, MIL-W-22759 wire routing, and IPC/WHMA-A-620 compliance for defense airframe contracts.
AOG Defect Rectification Specialist
Perform flight-line fault isolation using Time-Domain Reflectometry (TDR), emergency harness repairs, and rapid re-certification.
Aerospace PCB Layout Engineer
Design multi-layer high-speed digital and RF PCBs, execute signal integrity SI/PI simulations, and ensure IPC Class 3 manufacturability.
Mil-Spec QC Inspector
Execute dielectric high-pot testing, crimp pull validation, and pin-out inspection for MIL-DTL-38999 connectors and relay LRUs.
Direct Engineering Desk
Contact & Project Transmission
Submit your aerospace PCB design inquiries, custom EWIS harness specifications, or emergency AOG defect rectification requests directly to our engineering desk.
Official Desk
Engineering Inquiry Desk
Sheridan, WY, USA
Commercial & Global Contracting Office
Avionic Modification & Rectification Services
Engineering, Harness Loom Facility & Flight-Line SupportDirect Dispatch
Transmit Project Specifications
Provide your system requirements for prompt technical assessment and engineering review.