Downloaded from https://www.everyspec.com ADS-43A-HDBK 2.1 INTRODUCTION Section 2 identifies critical characteristics for parts identified as FSP. It also identifies standard test requirements for substantiation of alternate source parts. Parts lists for each of the three (3) engine models covered by this document are listed in the ETT in the FSPIS. Different series of an engine in the Army inventory (i.e. 700,701,7OlC etc.), are listed separately. Source controlled parts and FSP are highlighted. Required qualification tests are identified for each part and are coded alphabetically as shown in subsection 2.3 of Section 2.
The USAATCOM Engineering Directorate has the option to waive certain required tests upon request if the prospective vendor can show evidence that the test is not necessary or that he has already successfully conducted the test on an equivalent part. The USAATCOM Engineering Directorate reserves the right to specie additional engine and component qualification test requirements of AV-E-8593, paragraph 4.6, which addresses potential failure modes, based on design experience, service experience, or absence of complete manufacturing data. The parts lists in the ETT show the following: A. If part is source controlled. B. If part is FSP. C. Tests required for alternate source qualification. D.
Critical characteristics. Generic critical characteristics will apply to those parts not listed (See 2.2.5). 2.2 CRITICAL CHARACTERISTICS A critical characteristic is defined in paragraph 1.1.4. All critical characteristics require 100% inspection. The only exception is where the required inspection procedure renders the part unusable. When this occurs, the vendor will propose a sampling procedure to USAATCOM engineering for approval. Statistical methods may be utilized in lieu of 100% inspection of nondestructively inspectable critical characteristics with the approval of the local Government Quality Assurance Representative and the PC0 of USAATCOM Quality Engineering Division.
All statistical methods must be approved in writing prior to implementation. All FSP have critical characteristics which are identified on the applicable drawings. Without these drawings, critical characteristics cannot be properly identified. Reverse engineering of FSP or components of assemblies which are FSP is not permitted. 2.2.1 Materials 11