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Gulfstream IV/G400/G450 parts: what is for sale, what fails, which ADs apply
612 Gulfstream IV/G400/G450 aircraft are on the U.S. registry across 5 variants. This page gathers what the record holds for the type: parts listed here with condition and trace, the airworthiness directives that name it, the parts operators report most in FAA service difficulty reports, and who can repair its components. Every part number links to its own page. Data, not advice.
0
parts listed here
0
sellers
12
airworthiness directives
88
service reports, 5 yr
612
U.S. aircraft
480
registrants
For sale here, tagged to the Gulfstream IV/G400/G450
No listing is tagged to this aircraft today. Search any part number for who has it, or send a request from the part page; sellers who carry the families are told within the hour.
Sellers: parts you list with an aircraft type appear here automatically. Listing is free, no commission.
Parts operators report most on the Gulfstream IV/G400/G450
From 88 FAA service difficulty reports filed in the last five years. A count is how often a part was reported, not a judgment of the part; high-count items are the ones a shop should have on the shelf.
| Part | Most-reported part number | Reports |
|---|---|---|
| Flap System | 1159CS20000560 | 4 |
| Hydraulic Line | 1159H4020027 | 3 |
| Dump Valve | 1159SCH51219 | 3 |
| Window | 1159CE2003437 | 3 |
| Windshield | 1159SCB10213 | 3 |
| Panel | not stated | 3 |
| Mount | not stated | 2 |
| Actuator | 1159SCL200465B8 | 2 |
| Wedge | not stated | 2 |
| Wire | not stated | 2 |
| Control Valve | 1159SCH23133 | 2 |
| Outflow Valve | 10274642 | 2 |
| Controller | 10421 | 2 |
| Electronic Unit | 60065261 | 2 |
| Switch | 1159F5014061 | 2 |
| Engine | TAY6118C | 2 |
| Cabin Pressure | not stated | 2 |
| Fuel Sys | not stated | 1 |
| Handle | not stated | 1 |
| Hose | 1159H4020083 | 1 |
Airworthiness directives naming the Gulfstream IV/G400/G450
6 final, 6 proposed. Each AD page lists the part numbers it names and who sells them.
- 2023-08-03 · Gulfstream Aerospace Corporation Airplanes · May 16, 2023
- 2022-25693 proposed · Gulfstream Aerospace Corporation Airplanes · Nov 25, 2022
- 2022-02-15 · Gulfstream Aerospace Corporation Airplanes · Jan 20, 2022
- 2021-23013 proposed · Gulfstream Aerospace Corporation Airplanes · Oct 26, 2021
- 2020-12-06 · Gulfstream Aerospace Corporation Airplanes · Jun 15, 2020
- 2019-27716 proposed · Gulfstream Aerospace Corporation Airplanes · Dec 27, 2019
- 2019-20-08 · Gulfstream Aerospace Corporation Airplanes · Nov 8, 2019
- 2019-06275 proposed · Gulfstream Aerospace Corporation Airplanes · Apr 2, 2019
- 2018-16491 proposed · Gulfstream Aerospace Corporation Airplanes · Aug 2, 2018
- 2018-15964 proposed · Gulfstream Aerospace Corporation Airplanes · Jul 27, 2018
- 2018-09-04 · Gulfstream Aerospace Corporation Airplanes · Jun 11, 2018
- 2018-09-04 · Gulfstream Aerospace Corporation Airplanes · May 7, 2018
The fleet
612 aircraft, 480 registrants.
- G-IV Gulfstream Aerospace · 355
- GIV-X (G450) Gulfstream Aerospace · 234
- GIV-X Gulfstream Aerospace · 9
- G-IV (G400) Gulfstream Aerospace · 8
- GIV-X (G350) Gulfstream Aerospace · 6
Largest fleets: CA 83, UT 73, DE 70, FL 68, TX 44, OH 42.
Repair and requests
No repair station here names this type yet. Search repair capabilities by part number.
Need a part? Open its page and send a request; no account.
Questions
- What Gulfstream IV/G400/G450 parts are for sale on PartsAndPlanes?
- No listing is tagged to the Gulfstream IV/G400/G450 today; a request from this page reaches sellers who carry its families, and the part pages show who has each number.
- Which airworthiness directives apply to the Gulfstream IV/G400/G450?
- 12 FAA airworthiness directives on our record name the Gulfstream IV/G400/G450, 6 of them final; each links to the AD page with the part numbers it names.
- What parts fail most often on the Gulfstream IV/G400/G450?
- Operators filed 88 service difficulty reports on the Gulfstream IV/G400/G450 in five years; the parts reported most were Flap System (1159CS20000560), Hydraulic Line (1159H4020027), Dump Valve (1159SCH51219), Window (1159CE2003437). Counts are the FAA's; they describe reporting, not reliability.
- How many Gulfstream IV/G400/G450 aircraft are registered in the U.S.?
- 612 aircraft across 5 model variants, held by 480 registrants; the largest fleets are in CA, UT, DE.
Registry and reports as of 2026-09-28. See also condition codes and NSN lookup.