Low Pressure Oil Switch Repair & Overhaul
FAA & EASA certified low pressure oil switch repair and overhaul.
About the Low Pressure Oil Switch
A low pressure oil switch is a pressure-sensing switch that detects when engine or system oil pressure falls below a safe threshold, actuating electrical contacts to trigger a cockpit warning of impending lubrication loss. It typically uses a diaphragm or piston referenced against a calibrated spring to close or open contacts at a defined low-pressure setpoint, providing an early indication of pump failure, leakage, or oil starvation. Within the sensors and switches group it is a protective monitoring device for the lubrication system. Repair and overhaul are driven by diaphragm or piston fatigue, calibration and setpoint drift, spring relaxation, electrical contact wear and pitting, port seal leakage, corrosion, and contamination that cause inaccurate actuation, nuisance warnings, or failure to signal a genuine low-pressure condition.
Our Low Pressure Oil Switch Repair Capability
QTC repairs and overhauls low pressure oil switch components to the original manufacturer's specifications under our FAA and EASA Part 145 approvals. Our engineers — including former OEM sensors & switches specialists — perform teardown, inspection, cleaning, component replacement, functional and leak testing, and certification, and develop repairs for rejected and beyond-economic-repair (BER) hardware.
All Low Pressure Oil Switch Parts We Service
Click a part number for repair details and to request a quote.
| Part number | Make | Model |
|---|---|---|
| 21SN04-275A | Pratt & Whitney | PW2000/4000 |
Frequently Asked Questions
Does QTC repair low pressure oil switch components?
Yes. QTC repairs and overhauls low pressure oil switch components under our FAA & EASA Part 145 approvals. Our catalog lists 1 low pressure oil switch part number. Request a quote to confirm capability and turnaround.
What aircraft use the low pressure oil switch?
In our catalog, low pressure oil switch part numbers appear on Pratt & Whitney. See the full parts list below.
What is involved in low pressure oil switch repair and overhaul?
Our process typically includes incoming inspection, disassembly, cleaning, non-destructive evaluation, repair or replacement of worn elements, functional/leak testing, and certification with the appropriate airworthiness release.
Request a Quote for Low Pressure Oil Switch Repair
Send us your part numbers and condition. Our engineers respond with repair scope, turnaround, and pricing.