AeroShell Grease 33

Approved by

• Boeing
• Airbus

Standards & approvals

• MIL-PRF-23827C

  MIL-PRF-23827C — aviation grease

  The US military specification for a general-purpose aircraft grease; Type II covers a specific base-oil/thickener variant.

• AIMS 09-06-002

  Airbus AIMS 09-06-002 (general purpose airframe grease)

  Airbus specification for general purpose, low-temperature airframe grease.

• COMAC QPL-CMS-OL-311

  COMAC QPL-CMS-OL-311 — qualified products list

  An entry on COMAC's Qualified Products List for the CMS-OL-311 requirement.

• BMS 3-33B

  BMS 3-33B — Boeing general-purpose aircraft grease

  The Boeing material specification for a synthetic, non-clay, corrosion-inhibiting general-purpose grease for airframe lubrication on Boeing aircraft.

Specifications

Brand

Shell

Range

AeroShell

Category

Aviation greases

Manufacturer code

001A0903

Availability

On request

Typical characteristics

Manufacturer's description

AeroShell Grease 33 is a universal synthetic airframe grease composed of a lithium complex thickener and synthetic base oils, with oxidation and corrosion inhibitor and load carrying additives. For use in the temperature range –73 0C to +121 0C.

Applications

• For many years, aircraft operators have sought to rationalise the greases used on board aircraft and to reduce the number of different greases in their inventories. Recently, Boeing began researching a new multi-purpose, anti-corrosion grease. The aim was for a clay-free grease that would give longer life to components and mechanisms and that would have improved wear and corrosion resistance. This led to the introduction of a new Boeing specification, BMS 3-33B.
• Given the wide range of operating temperatures, loads and other environmental conditions required for different aircraft components, many different types of grease, with different properties, are used in the routine lubrication of aircraft components. In developing their BMS 3-33B specification, Boeing considered the properties of the various grease types used for aircraft and wrote a specification for a grease that would deliver improved performance and could be used across the widest possible range of grease applications.
• AeroShell Grease 33 is approved to BMS 3-33B and delivers the improved performance characteristics required by that specification.
• AeroShell Grease 33 can be used for routine lubrication on Boeing aircraft where MIL-PRF-23827C or BMS 3-24 is specified. AeroShell Grease 33 can also be used in certain applications on Boeing aircraft that require the use of MIL-G-21164. Other applications on Boeing aircraft requiring the use of MIL-G-21164 and other greases are under review, and in due course Boeing will issue details of the full range of applications. For the current status, consult the latest issue of the Boeing Service Letter "BMS 3-33B General Purpose Aircraft Grease".
• AeroShell Grease 33 can be used for routine lubrication in applications where MIL-PRF-23827C is specified on aircraft produced by McDonnell Douglas, Airbus, BAe Regional Aircraft, Canadair, Lockheed, Embraer, Fokker and Gulfstream (except for bearings, applications above 121 0 C and sliding applications requiring molybdenum disulphide).
• Other aircraft manufacturers are evaluating AeroShell Grease 33 with a view to using the approvals for their aircraft. Operators should check regularly with these manufacturers for the latest status.
• The use of AeroShell Grease 33 can provide operators with the following benefits:
• Reduced inventories; reduced maintenance and labour costs; fewer opportunities for misapplication of the product.

Performance & benefits

• AeroShell Grease 33 contains a synthetic oil and should not be used with incompatible seal materials