Downloaded from https://www.everyspec.com ADS-39A (HDBK) Source Approval and Engineering Test Requirements for Alternate Sources of Helicopter Drive System Assemblies and Components Attachment 1 Parts List 1 Introduction 1.1 This Attachment to Aeronautical Design Standard (ADS) 39A lists helicopter drive system components and assemblies, and defines the specific requirements that are applicable to those components and assemblies. 1.2 The attached listing information is as follows: Column Heading Information Given Part Number Part Number for the component or assembly. Part Name Nomenclature for the component or assembly. Part NSN Part national Stock Number.
Part Used On The major assembly the part is used on. Assy? Indicates the part is an assembly (ASY) of other components. SCD? Indicates the part is controlled by a Specification or Source Control Drawing (SCD). C/F? Indicates the part is made from a casting (CST) or forging (FRG). Plan? Indicates a manufacturing plan (MNF) is required. FSP? Indicates the part is designated as a Flight Safety Part (FSP). Insp? Indicates a compliance inspection (COM) is required. Bal? Indicates the part has dynamic balancing (BAL) requirements. Hrdn? Indicates a hardness check (HRD) is required. Matl? Indicates a material evaluation (MAT) is required. End? Indicates and endurance test (END) is required.
Code is END-XXX-Y, where XXX is the length of the test, and Y is the test spectrum from Attachment 2. Clutch? Indicates a clutch performance test (CLU) is required. Other? Indicates other tests are required (OTH). See Section 4 below for instructions. 2 Database 2.1 A database is being developed to provide enhanced access to the information in this Attachment. Future revisions to this attachment will provide information on accessing and using the database. 3 Use of Attachment 1 1