Calco Mfg 551-992 Controller

The Calco Mfg. Co. 551‑992 is a flap control amplifier used in Piper aircraft (e.g., Cheyenne II, PA‑31). Common failures include blown fuses or degraded capacitors on the power supply board, worn relay contacts that interrupt signal transmission to the flap actuators, and loose or corroded wiring connections between the amplifier and the flap actuator. For troubleshooting, first verify the 24 V DC input voltage and check for any blown fuses; next inspect the relay contacts and associated capacitors for signs of wear or burn marks; finally confirm proper signal integrity by measuring output voltages to the actuator terminals while cycling the control lever.[oss-gpt-20b]

Need your Calco Mfg repaired or tested?

We specialize in the repair and refurbishment of high-end industrial control electronics and power systems like this unit.

⚙️ Fast Diagnostics – Same-day evaluation available
🔁 Reliable Turnaround – Most jobs ship within 5–10 business days
🧰 Expert Technicians – Decades of board-level experience
✅ 1-Year Warranty – Every repair fully guaranteed

📞 Call Now: 1 (336) 969-0110

Free Estimates • Industrial-grade testing • Nationwide Service

⚡ Call to Purchase AI Services — help us build the next Grace Blackwell GX10 node.

Industrial AI Hardware Recovery — Free Diagnostic • Pay Return Shipping Only

[oss-gpt-20b]

We reclaim and repair GPUs and industrial AI hardware (cards, PSUs, fan modules, VRM boards). Free estimate — you only pay return shipping if you decline.