Calco 551-992 Controller
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The Calco 551‑992 is a flap control amplifier (Piper PA‑31‑T1) that drives the flap actuators via an internal relay and motor driver circuit. Common failures on this model include burned‑out output relays or MOSFETs, damaged input fuses, and corrosion on the connector pins due to vibration or moisture ingress. First‑check diagnostics: verify 24 V DC supply to the unit and confirm continuity of the input fuse; inspect the relay contacts for pitting or overheating; review any recorded fault codes from the aircraft’s avionics display for “AMP FAIL” or similar messages.[oss-gpt-20b] |
Need your Calco 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
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- ✅ 1-Year warranty on completed repairs
Free Estimates • Industrial-grade testing • 1-Year Warranty • Nationwide Service
Other Repaired Units by Calco
Calco 8219 M2 Trim ServoCalco 551-992 ControllerCalco 8411 ControllerContact Us
🚑Shop Location🛠️
Industrial Electronic Repair
145 Rockwell Place Ct
Tobaccoville, NC 27050
🚑 Rush repair shipments only — no walk-ins.
📞Phone
📦Mailing Address🚛
Industrial Electronic Repair
931-E S. Main St #204
Kernersville, NC 27284
📦 Mailing Address (for invoices or shipped repairs)
No walk-ins accepted.