Regulating Shutoff Valve Assembly Repair & Overhaul
3213812-4 — Regulating Shutoff Valve Assembly Repair & Overhaul
| Part number | 3213812-4 |
|---|---|
| Nomenclature | Regulating Shutoff Valve Assembly |
| Manufacturer | Honeywell |
| Aircraft make | Bombardier |
| Aircraft model | Learjet 25 |
| Capability | Pressure Regulating Valves |
FAA & EASA Part 145 repair & overhaul. We'll confirm turnaround and pricing.
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Component Overview
A regulating shutoff valve assembly is a pneumatic control valve that both regulates downstream pressure and provides positive shutoff of bleed or pack air, typically a pressure-balanced butterfly valve driven by a torque motor or pneumatic actuator with an integral regulator. Installed in the air management distribution system, it maintains a controlled downstream pressure for environmental control, anti-ice, or pneumatic services and isolates flow on command or fault. Within the system it combines metering and isolation functions in one body. Repair and overhaul are driven by butterfly and bushing wear, actuator diaphragm and spring fatigue, regulator drift, solenoid and torque-motor degradation, seat and seal erosion causing leakage, and contamination-induced sticking that compromise pressure regulation and reliable closure.
Aircraft Application
Part number 3213812-4 (Regulating Shutoff Valve Assembly) is installed on the Bombardier Learjet 25. QTC supports operators and MROs servicing this platform with certified repair and overhaul.
Our Repair Capability
QTC repairs and overhauls 3213812-4 to the original manufacturer's specifications under our FAA and EASA Part 145 approvals. Our team — including former OEM pneumatic & air management engineers — performs teardown, inspection, cleaning, component replacement, functional testing, and certification, returning a serviceable unit with the appropriate airworthiness release. We also develop repairs for rejected and beyond-economic-repair (BER) hardware.
Related Parts
Other regulating shutoff valve assembly part numbers we repair — view all Regulating Shutoff Valve Assembly parts →
| Part number | Nomenclature | Model |
|---|---|---|
| 3213812-1 | Regulating Shutoff Valve Assembly | Learjet 24 |
| 3213812-1 | Regulating Shutoff Valve Assembly | Learjet 25 |
| 3213812-2 | Regulating Shutoff Valve Assembly | Learjet 24 |
| 3213812-2 | Regulating Shutoff Valve Assembly | Learjet 25 |
| 3213812-4 | Regulating Shutoff Valve Assembly | Learjet 24 |
| 3213812-5 | Regulating Shutoff Valve Assembly | Learjet 24 |
| 3213812-5 | Regulating Shutoff Valve Assembly | Learjet 25 |
| 3213812-6 | Regulating Shutoff Valve Assembly | Learjet 24 |
Frequently Asked Questions
Can QTC repair part number 3213812-4?
Yes. 3213812-4 (Regulating Shutoff Valve Assembly) is within QTC's FAA & EASA Part 145 repair and overhaul capability. Request a quote to confirm current turnaround and pricing.
What aircraft is part 3213812-4 used on?
3213812-4 is used on the Bombardier Learjet 25.
What condition does QTC accept for 3213812-4?
QTC accepts serviceable, unserviceable, and beyond-economic-repair (BER) units for evaluation. Our engineers determine the most cost-effective repair path after incoming inspection.
What is the typical turnaround time for regulating shutoff valve assembly repair?
Turnaround depends on repair scope and material availability. Contact QTC for a current estimate.
Request a Quote for 3213812-4
Send us the part number and condition and our engineers will respond with repair scope, turnaround, and pricing.