1. SCOPE 1.1 Purpose: This specification covers the requirements for saturation peening (type 1), straightening and forming (type 2) metal parts using controlled pneumatic activated needles. 1.2 Applications: The process is used to perform localised peening peening on small area or for local re-peening of blemished areas, straightening and reshaping of parts and for cosmetic surface restoration of peened parts but usage is not restricted to these applications. Use of controlled pneumatic needle peening requires customer approval. when used to replace manual shot peening, automated shot peening or rotary flapper peening.
This SAE Aerospace Material Specification is intended to provide technical requirements such as equipment requirement, pressure measurement, needles determination and process practices as well as quality Assurance provisions for engine and components repairs using needle peening.