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3072397-3 – Honeywell OEM Axial Compressor Disc
Available now through the AirParts Aero marketplace.
Overview Section
The Honeywell 3072397-3 is a flight-critical Axial Compressor Disc engineered for high-performance turbine engines, most notably the Honeywell TFE731 and TPE331 series. As a primary component of the compressor section, this disc serves as the structural hub for a stage of axial compressor blades.
Operating at rotational speeds exceeding 25,000 RPM, the 3072397-3 is designed to withstand massive centrifugal forces while maintaining precise dimensional stability under extreme thermal loads. This disc is a "Life Limited Part" (LLP), meaning its airworthiness is strictly tracked by cycles and hours due to the fatigue stresses inherent in turbine operation.
Key Features Section
Super-Alloy Construction: Forged from high-strength, heat-resistant nickel or titanium alloys designed to resist "creep" (permanent deformation) at high temperatures.
Precision Machined Fir-Tree Slots: Features intricately machined "fir-tree" or "dovetail" slots on the outer rim to securely lock compressor blades in place while allowing for thermal expansion.
Dynamic Balance Calibration: Individually balanced to microscopic tolerances to prevent engine vibration and harmonic resonance that could lead to bearing failure.
Shot-Peened Surface: The disc surface undergoes controlled shot-peening to induce compressive residual stresses, significantly increasing its resistance to fatigue cracking.
Integrity-Tested: Each disc is subjected to Non-Destructive Testing (NDT), including Fluorescent Penetrant Inspection (FPI) and ultrasonic testing, to ensure zero internal defects.
Optimized Strength-to-Weight Ratio: Engineered to minimize rotating mass, which improves engine throttle response and overall fuel efficiency.
Technical Specifications Section
| Specification | Detail |
| Part Number | 3072397-3 |
| Manufacturer | Honeywell Aerospace |
| Engine Application | TFE731 Series / TPE331 Series |
| Component Type | Axial Compressor Disc (Rotor) |
| Material | Nickel-Base Superalloy or Titanium |
| Classification | Life Limited Part (LLP) |
| Inspection Interval | Per Engine Maintenance Manual (EMM) |
Aircraft Compatibility Section
The 3072397-3 is a core component found in the engines of several prominent business and utility aircraft:
Cessna Citation III/VI/VII: Powered by the TFE731 series.1
Dassault Falcon 10/50/900: Utilizing the TFE731 turbofan engines.
Learjet 31/35/45/55: Core propulsion component for these high-speed platforms.
Hawker 800/850XP: Essential for the reliability of the mid-size jet's powerplants.
Technical Applications & Safety
The compressor disc is the backbone of the engine's "cold section" (though it still operates at high temperatures). It converts mechanical energy from the turbine shaft into compressed air for combustion.
Safety Warning: Because the 3072397-3 is a Life Limited Part, it must be accompanied by full traceability (back to birth) documents. Operating a disc beyond its certified cycle limit or without proper logbook entries is a violation of FAA/EASA regulations and poses a risk of uncontained engine failure. During borescope inspections, any nicks or cracks in the disc rim or blade slots are grounds for immediate engine removal.
SEO-Enhanced Addendum: Technical Engineering Insight
The engineering value of the 3072397-3 lies in its Low-Cycle Fatigue (LCF) management. Every time an engine starts and accelerates to takeoff power, the disc undergoes a stress cycle as centrifugal forces "stretch" the metal. The 3072397-3 is engineered to ensure that this stretching remains within the elastic range of the alloy for a specified number of cycles.
By sourcing this critical component through AirParts Aero, you ensure that the disc has been handled and stored to prevent "FOD" (Foreign Object Damage) or surface corrosion, which can act as a stress concentrator and lead to premature fatigue failure.
Installation & Maintenance Addendum
Blade Matching: When installing blades into the 3072397-3, they must be matched by weight and "moment" as specified in the overhaul manual to maintain rotational balance.
NDT Requirements: During every major "C" check or MPI (Major Periodic Inspection), the disc must undergo FPI to check for microscopic cracks in the fir-tree slots.
Shaft Alignment: Ensure the disc is correctly splined and torqued to the main tie-shaft; improper seating can cause orbital vibration that damages the entire engine core.
