2 ½” Shutoff Valve Repair & Overhaul
109788-1 — 2 ½” Shutoff Valve Repair & Overhaul
| Part number | 109788-1 |
|---|---|
| Nomenclature | 2 ½” Shutoff Valve |
| Manufacturer | Allied Signal |
| Aircraft make | Gulfstream |
| Aircraft model | GIV |
| Capability | Shutoff Valves |
FAA & EASA Part 145 repair & overhaul. We'll confirm turnaround and pricing.
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Component Overview
A 2½-inch shutoff valve is a pneumatic line valve, typically a butterfly type, used in the air management system to start, stop, or isolate bleed or conditioned airflow in ducting of that nominal diameter. A disc rotated by a pneumatic or electric actuator opens or closes the flow path on command, controlling air delivery to packs, anti-ice, or distribution circuits and providing isolation for safety and maintenance. Operating in hot, high-pressure, vibratory service, it commonly suffers butterfly disc and shaft bearing wear, seal and seat erosion or leakage, actuator diaphragm or solenoid degradation, corrosion and contamination causing sticking, and bushing wear producing position error. These conditions drive functional and leak testing, seal and bearing replacement, actuator overhaul, and full bench rebuild.
Aircraft Application
Part number 109788-1 (2 ½” Shutoff Valve) is installed on the Gulfstream GIV. QTC supports operators and MROs servicing this platform with certified repair and overhaul.
Our Repair Capability
QTC repairs and overhauls 109788-1 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 2 ½” shutoff valve part numbers we repair — view all 2 ½” Shutoff Valve parts →
| Part number | Nomenclature | Model |
|---|---|---|
| 109788-1 | 2 ½” Shutoff Valve | GII |
| 109788-1 | 2 ½” Shutoff Valve | GIII |
| 109788-3 | 2 ½” Shutoff Valve | GI |
| 109788-3 | 2 ½” Shutoff Valve | GII |
| 109788-3 | 2 ½” Shutoff Valve | GIII |
| 109788-3 | 2 ½” Shutoff Valve | GIV |
| 109788-2 | 2 ½” Shutoff Valve | Ground Power Unit |
| 109788-3 | 2 ½” Shutoff Valve | Jetstar II |
Frequently Asked Questions
Can QTC repair part number 109788-1?
Yes. 109788-1 (2 ½” Shutoff Valve) 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 109788-1 used on?
109788-1 is used on the Gulfstream GIV.
What condition does QTC accept for 109788-1?
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 2 ½” shutoff valve repair?
Turnaround depends on repair scope and material availability. Contact QTC for a current estimate.
Request a Quote for 109788-1
Send us the part number and condition and our engineers will respond with repair scope, turnaround, and pricing.