PSC 1620: AIRCRAFT LANDING GEAR COMPONENTS — Federal Procurement Code

Description

Aircraft Landing Gear Components

Includes

Shock Struts and Components; Installation Elements, such as Torsion Bars, Vibration Links, Drag Struts; Landing Gear Trunions, Axles and Shimmy Dampeners; Specially designed hydraulic power steering system components.

Excludes

Mounting Braces and Mounting Plates permanently installed on aircraft (FSC 1680); Landing Wheels, Skis, and Floats (FSC 1630); Wheel Brakes and Wheel Brake Cylinders (FSC 1630).

Suggested adjacent classifications

PSC codes describe what the government buys. These related classifications help connect procurement codes to industries, commodities, and trade workflows.

Frequently asked questions

What is NAICS 1620?

NAICS 1620 is the North American Industry Classification System code for AIRCRAFT LANDING GEAR COMPONENTS. It classifies this business activity for statistical, regulatory, and government procurement purposes. Federal agencies use NAICS codes to collect and publish data about the US economy, determine SBA size standards, and set aside contracts for small businesses.

What licenses and permits does a AIRCRAFT LANDING GEAR COMPONENTS need?

A AIRCRAFT LANDING GEAR COMPONENTS typically needs a local business license, a federal EIN from the IRS, and industry-specific permits depending on the sector. Check with your city or county clerk for a general business license, your state's professional or industry licensing board for any required occupational licenses, and your state's tax authority for a sales tax permit if you sell taxable goods or services.

How do I register a AIRCRAFT LANDING GEAR COMPONENTS business in the United States?

To register a AIRCRAFT LANDING GEAR COMPONENTS business, first choose your legal structure: sole proprietorship (simplest, uses SSN), LLC (personal liability protection, files with your Secretary of State), or corporation (Form 1120 or 1120-S). Register your business name (DBA) with your county if operating under a trade name. Obtain an EIN from the IRS at irs.gov/ein. Register with your state revenue department for any applicable taxes.

What tax forms does a AIRCRAFT LANDING GEAR COMPONENTS file with the IRS?

Tax forms depend on your entity type. A sole proprietor files Schedule C with Form 1040 and Schedule SE for self-employment tax (15.3%). An LLC taxed as a partnership files Form 1065 with Schedule K-1s. A C-Corporation files Form 1120 (21% flat rate). An S-Corporation files Form 1120-S. All businesses paying employees file Form 940 (FUTA) annually and Form 941 quarterly. Estimated tax payments are made via Form 1040-ES four times per year.

Is AIRCRAFT LANDING GEAR COMPONENTS the right NAICS code for my business?

Your NAICS code should reflect your primary business activity — the one generating the most revenue or value. If AIRCRAFT LANDING GEAR COMPONENTS describes your main line of business, NAICS 1620 is likely correct. If you have multiple distinct activities, you may need separate codes for statistical reporting. For federal contracting, your SAM.gov registration should use the code that best matches the work you perform. Review the official NAICS 1620 description and exclusions to confirm it fits your operations.

Can a AIRCRAFT LANDING GEAR COMPONENTS form an LLC, or does it require a Professional entity (PC/PLLC)?

Licensed professionals in most states cannot form a regular LLC and must instead form a Professional Corporation (PC), Professional LLC (PLLC), or Registered Limited Liability Partnership (LLP). This ensures personal liability for professional malpractice remains with the individual professional while protecting against the entity's business debts. All owners/members must hold the relevant professional license. Professional entities must file articles with both the Secretary of State and the licensing board, and entity names must include 'Professional,' 'PC,' or 'PLLC.'

Does a AIRCRAFT LANDING GEAR COMPONENTS need E&O (Errors & Omissions) insurance?

Professional liability / E&O insurance protects a AIRCRAFT LANDING GEAR COMPONENTS against claims of negligence, errors, or failure to perform professional duties. Many licensing boards require E&O as a condition of licensure (particularly for real estate, insurance, and certain design professionals). Even when not legally required, it is standard practice — commercial general liability policies exclude professional services. Policy limits typically range from $1M-$5M. Claims-made policies are most common, requiring 'tail' coverage when you stop practicing.

What engagement letter or contract does a AIRCRAFT LANDING GEAR COMPONENTS need to use with clients?

Every professional service engagement should be documented in a written letter of engagement or professional services agreement. It should include: scope of services (and what is excluded), fee structure (hourly, flat, contingent — and whether contingent fees are allowed by your profession's ethics rules), payment terms, limitation of liability clause (where permitted), dispute resolution method (mediation/arbitration), and termination conditions. State bar associations and professional societies typically publish model engagement letters. Oral agreements create significant liability risk.

What advertising and solicitation rules does a AIRCRAFT LANDING GEAR COMPONENTS need to follow?

Each profession has ethical rules governing advertising. Lawyers: ABA Model Rule 7.1-7.5 (no false/misleading claims, testimonials permitted with disclosures, specialization claims require certification). Accountants: AICPA Code of Conduct prohibits solicitation that creates false expectations or implies ability to influence officials. Real estate agents: must include brokerage name prominently. General FTC rules: all advertising claims must be truthful, not misleading, and substantiated. Using client names or logos requires written consent.