AMSC Gaps Portal

Maintenance and Repair Section

Updates have been made to the following gaps:

With respect to maintenance and sustainment of AM machines, standards for AM analyses in Reliability Centered Maintenance (RCM) and Conditioned Based Maintenance (CBM+) are needed.

&D Needed: No

Recommendation: Update SAE JA1012, a guide to provide analytics for AM trade-offs in RCM and CBM+.

Priority: Medium

Organization: SAE, ISO, ASTM

Status of Progress: Not Started

Update: SAE G-11M, Maintainability, Supportability and Logistics Committee, will consider inclusion of analytics for AM trade-offs in the next update of JA1012_201108.

Standards for AM LORA are needed. In performing a repair versus discard analysis, the use of AM can change the LORA decision due to shifts in factors relating to logistics delay time, spares availability, cost of spares, etc. Trade space would address reduction of time and increase in skill set (e.g., for qualified printer operators).

R&D Needed: No

Recommendation: Update SAE AS1390, Level of Repair Analysis (LORA), to include impact of AM on trade space of repairs.

Priority: Medium

Organization: SAE LCLS, SAE AMS-B, ISO, ASTM

Status of Progress: Green

Update: SAE’s LCLS (Life Cycle Logistics Supportability) Committee plans to include AM in the upcoming revision of AS1390. Although the LCLS Committee has not opened a Work in Progress for AS1390, a team is working on revisions and has agreed to include AM. The SAE G-11M Committee is in the process of reorganizing but the chair has the AMSC requests on his radar. In addition, AMS2680C is currently under revision.

5/22/2019, LY: Repair SC established.

5/8/2019, LY: SAE’s Life Cycle Logistics Supportability Committee plans to include the acceptance of additive manufacturing in the upcoming revision to AS1390, Level of Repair Analysis.

A standard inspection process for component or tooling defects is needed to consider additive manufacturing technologies as potential solutions for preventative and corrective maintenance actions.

R&D Needed: No

Recommendation: Update SAE JA1011/1012 to include an inspection process for additive manufacturing repairs.

Priority: Medium

Organization: SAE, ISO/ASTM

Status of Progress: Not Started

Update: SAE G-11M, Maintainability, Supportability and Logistics Committee, will consider inclusion of an inspection process for AM repairs in the next update of JA1011_200908 and JA1012_201108.

Standard practices for model-based inspection methods using AM are needed for repair assessments and scheduling.

R&D Needed: No

Recommendation: Develop standard practices for assessing level of damage for end-use parts.

Priority: Medium

Organization: ASME, ISO/ASTM, Dimensional Metrology Standards Consortium

Status of Progress: Not Started, or Unknown

Update: No update provided.

A standard is needed for how preventative maintenance operations of AM machines are tracked (e.g., monitoring printer health, need for servicing, etc.).

R&D Needed: No

Recommendation:

  • Develop a standard for tracking maintenance operations to ensure a printer is ready when needed. See also Gap PC3 on machine health monitoring.
  • Develop a standard to address emergency repair/limited life parts for urgent cases in the field.

Priority: Medium

Organization: AWS, ASTM

Status of Progress: Unknown

Update: None provided

In support of on-site repairs, guidance is needed that addresses cybersecurity considerations for maintenance and repair of parts that have 3D models ready to print. Secure storage in a database should ensure that only authorized personnel can download files and print parts.

R&D Needed: Yes

Recommendation: Guidance is needed to ensure the integrity and safe storage of AM files as maintenance and repair operations may take place in an uncontrolled environment. See also gap PC15 on configuration management: cybersecurity.

Priority: Medium

Organization: NIST, NEMA/MITA, NDIA JWG, ASTM, IEEE-ISTO PWG

Status of Progress: Not Started, or Unknown

Update: None provided

Standards are needed for chemical compatibility with additively manufactured materials for surface cleaning in preparation for an additive repair process. Additionally, standards are needed for removal of coatings, including paints and powder coating, and plating (chrome, zinc, etc.) for additively manufactured parts.

R&D Needed: Yes

Recommendation: Develop standards for approved chemical substances and mechanical processes used for the removal of coatings and plating on additively manufactured components, to include metals, polymers, ceramics, and other materials.

Priority: Medium

Organization: ASTM, SAE, ISO

Status of Progress: Not Started, or Unknown

Update: None provided

Current standards do not specifically address the use of laser based systems (metal powder or wire feedstock) to additively repair parts or tools.

R&D Needed: No

Recommendation: Ensure that laser based additive repair processes are included in AWS D20.1.

Priority: Low

Organization: AWS, SAE AMS-AM

Status of Progress: New

Update:

5/22/2019, LY: Repair SC established.

5/8/2019, LY: SAE’s AMS-AM Additive Manufacturing Committee established the Additive for Repair Working Group in September 2018. Currently developing a scenario to establish the specification framework utilizing a damaged airframe component requiring a directed energy deposition repair. Once finalized, the working group plans to develop material and process specifications for aerospace repair applications.

4/4/2019, LY: The AWS recently published a new standard on AM, AWS D20.1/D20.1M:2019 Specification for Fabrication of Metal Components using Additive Manufacturing.