SAE AIR7522

This SAE Aerospace Information Report (AIR) provides guidelines for the design of portable Controlled Contamination Areas (CCAs) that can provide localized environmental control when processing a repair at the airplane or in a hangar environment. The use of a portable CCA may result in a better quality repair. The use of a portable CCA may assist in achieving the environmental requirements for bonded repairs specified in an approved repair procedure. This provides an option to accomplish a repair on nonremovable structure or difficult to remove components. The purpose of this document is to provide guidelines for the construction of a portable CCA and its use to create a controlled climate (temperature, humidity) and contamination area that may be referenced in repair documents produced by airlines or airframe or engine manufacturers. In the absence of sufficient guidance in the repair document, these guidelines can be used to create and maintain a CCA. A CCA may be required for the repair so that oils, lubricants, dirt/dust, and other contaminants are at levels that are acceptable for structural bonding.