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1211601-201 – Textron Aviation Outboard Main Landing Gear Fitting
Available now on the Airparts.aero Marketplace.
The Textron Aviation 1211601-201 is a flight-critical, OEM outboard main landing gear fitting (Left Hand) engineered for the primary structural main gear carry-through assembly of the Cessna 206 Stationair and Turbo Stationair series. Positioned at the lower fuselage boundary where the tubular spring-steel main landing gear leg interfaces with the aircraft's internal structural frame, this heavy-duty forged fitting serves as the primary outboard anchor block. During ground taxi, takeoff roll, touchdown, and high-gross-weight landing operations, the fitting absorbs and redirects extreme multi-axial dynamic loads—converting vertical impact vectors, drag loads from ground friction, and side loads from crosswind maneuvers directly into the fuselage carry-through structure.
As the factory-authorized OEM replacement part number superseding legacy part numbers 1211601-3, 1211601-1, and 1211601-3-1, the 1211601-201 incorporates refined manufacturing tolerances and enhanced metallurgical controls. The fitting is precision-machined to ensure exact alignment of the main gear strut, maintaining wheel camber and toe-in geometry within strict factory specifications. Maintaining proper main gear geometry is vital for preventing asymmetric tire wear, directional instability during rollout, and severe stress concentrations across the fuselage belly skins.
For directors of maintenance, airframe sheet metal specialists, and fleet operators, sourcing an authentic Textron Aviation 1211601-201 fitting is essential for preserving structural airworthiness. Utilizing certified OEM landing gear fittings ensures that critical bolt hole tolerances, grain structure orientation, and surface barrier coatings meet rigid Type Certificate Data Sheet (TCDS) standards, protecting the airframe carry-through structure from fatigue damage and ensuring long-term operational safety.
Key Features
Precision Aerospace Forging: Manufactured from high-tensile structural aluminum alloy forging to maximize fatigue life and structural toughness under cyclic landing impact loads.
Factory-Authorized OEM Supersedure: Direct OEM drop-in replacement for legacy part numbers 1211601-3, 1211601-1, and 1211601-3-1.
Optimized Load Distribution Profile: Designed to minimize stress concentration factors ($K_t$) around mounting bolt holes and internal radius corners, reducing susceptibility to localized fatigue initiation.
Corrosion-Resistant Surface Protection: Features a mil-spec anodized base treatment sealed with a corrosion-inhibiting primer to protect against moisture ingress, road salt, and environmental oxidation.
Close-Tolerance Machined Bores: Precision-bored fastener holes guarantee an exact fit with mounting hardware, eliminating micro-fretting and hole ovalization under heavy dynamic shear forces.
Technical Specifications
Part Number: 1211601-201
Component Type: Outboard Main Landing Gear Fitting (Left Hand / L.H.)
OEM Manufacturer: Textron Aviation (Cessna)
Superseded / Alternate Part Numbers: 1211601-3, 1211601-1, 1211601-3-1
Right-Hand (R.H.) Companion Part Number: 1211601-202 / 1211601-202S
Material Composition: High-strength aerospace forged aluminum alloy (7075-T73 / T7351 series; verify exact alloy matrix via current OEM blueprint)
Surface Finish: Anodized per MIL-A-8625 with chemical-resistant zinc-chromate or epoxy primer coating
Packaged Weight: 2.29 lbs (1.04 kg)
Packaged Dimensions: 11.15 in. (L) x 6.20 in. (W) x 3.70 in. (H)
Export Control Classification Number (ECCN): EAR99 / 9A991.d
Certification Status: Supplied with FAA Form 8130-3 Dual Release or Textron Aviation Certificate of Conformance (CoC)
Aircraft Compatibility
Cessna 206H Stationair Series
Cessna Turbo Stationair T206H Series
Cessna U206 / P206 Series (where specified by IPC effectivity)
Cessna 207 / T207 Stationair 7 & 8 Series (where specified by IPC effectivity)
Note: The individual aircraft Illustrated Parts Catalog (IPC) for the applicable airframe serial number remains the final, absolute authority for part verification, exact effectivity, and required installation quantities.
Applications
Main Gear Strut Anchor: Acts as the primary outboard structural block securing the tubular spring-steel main gear leg to the lower fuselage carry-through box.
Ground-to-Airframe Load Transfer: Transmits dynamic vertical reaction forces, braking torque moments, and lateral side loads directly into the heavy fuselage bulkheads and bottom skin frames.
Why Choose 1211601-201?
Main landing gear attachment fittings operate in one of the most mechanically demanding environments on a utility aircraft. Over thousands of flight hours and landing cycles, original legacy fittings (such as the 1211601-3) can develop subtle bolt hole elongation, internal fretting wear, or stress corrosion cracking. Installing a compromised or uncertified fitting compromises the structural link between the spring gear leg and the fuselage, increasing the risk of structural misalignment, skin cracking, or landing gear attachment failure.
Upgrading to the genuine OEM 1211601-201 fitting restores factory-new structural margins and dimensional alignment. Sourcing authentic Textron Aviation hardware through Airparts.aero guarantees total metallurgical traceability, protects the airframe carry-through structure from improper load transfer, and satisfies all FAA and EASA regulatory standards for airworthiness.
The structural mechanics of the 1211601-201 main landing gear fitting rely on managing severe bending moments and reaction forces generated by the cantilevered spring-steel landing gear strut. Upon landing touchdown, the flat or tubular spring leg flexes upward, converting kinetic energy into elastic strain energy. This cantilever deflection creates a heavy force couple at the gear attachment fittings, subjecting the outboard fitting (1211601-201) to massive vertical compression and outward prying loads.
To endure these multi-axial fatigue cycles without undergoing premature failure, the 1211601-201 is forged from high-strength 7075 aluminum alloy processed to the T73 temper (7075-T73/T7351). While the peak tensile strength of T73 is slightly lower than that of the standard T6 temper, the over-aged T73 thermal treatment provides superior resistance to Stress Corrosion Cracking (SCC) and exfoliation along the short-transverse grain boundaries. This metallurgical structure prevents sub-critical intergranular crack growth in high-stress zones. Additionally, the close-tolerance machined fastener bores maintain a low stress-concentration factor, preventing micro-fretting and fatigue crack initiation along the attachment bolt interfaces during repetitive landing impact cycles.
Note: The 1211601-201 outboard main landing gear fitting is a flight-critical primary structural airframe component. Prior to installation, technicians must perform a thorough visual and dimensional inspection of the mating fuselage carry-through bulkheads, alignment shims, and attachment hardware (such as NAS/MS internal wrenching bolts). Any evidence of bolt hole elongation, fretting corrosion, or cracking on adjacent fuselage skins requires engineering evaluation per the Structural Repair Manual (SRM). Installation, torque sequencing, and landing gear alignment checks must be performed exclusively by an FAA-certified A&P mechanic or authorized Part 145 repair station in strict compliance with the current Cessna 206/Stationair Aircraft Maintenance Manual (AMM) Chapter 32 (Landing Gear) and Chapter 51 (Structures).
