The requirements herein are intended to ensure that the materials and processes used are not detrimental to the commercial aircraft when used as specified. These requirements are not intended to judge performance of the stripping method.
These requirements are intended to cover the use of both single and duplex processes involving mechanical, chemical, or thermal means, which include the following: 1) high pressure water blasting (with/without use of chemical paint softeners); 2) dry media blasting (e.g., wheat starch, plastic media blast (PMB), etc.); 3) wet media blasting (e.g., sodium bicarbonate); 4) ice-pellet blasting (e.g., CO2 or water, with/without use of chemical paint softeners); 5) chemical paint stripping (e.g., with/without a dedicated or strippable layer in the paint system); 6) thermal paint stripping (e.g., with/without the use of ice pellet stripping); and 7) other processes, may require different or additional requirements as determined necessary by the user and OEM.
The requirements are based on the materials and finishes present on the aircraft at the time of delivery. If the materials, finishes or the processing are changed subsequent to delivery, the individual user may require that additional or different tests be included in any evaluation.
The means of compliance with the requirements of this document will have to be negotiated between the user and the relevant regulatory authorities.
The test methods defined in this document constitute a recommended means of compliance.
The final responsibility for safety, health, environmental consequences, the selection of a process for stripping and the number of stripping cycles rests with the user.
It is the responsibility of the user to verify that all testing has been accomplished to the requirements of this specification. This includes verification of laboratory capabilities.
A formal instruction and training program for material and equipment operators, to include operator certification, shall be established and maintained by the user.
These requirements are not intended to cover repair materials. The individual user shall incorporate process control procedures and inspection to ensure damage to repair materials has not occurred. Repair material guidelines are located in Annex K.
Evaluation of strip processes may be performed on metallic and/or composite substrates for use on representative structure as defined by the user. Process limitations shall be well documented by the end user.