MIL-STD-1798 Mechanical Equipment And Subsystems Integrity ProgramThe purpose of this standard is to describe the general process to achieve and maintain the physical and functional integrity of the mechanical elements of aircraft systems. The goal of this integrity program is to achieve the desired level of safety and aircraft availability at the most economic cost across the life cycle of the weapon system. This standard allows the process to be tailored in a competitive environment to meet specific equipment, subsystem, and/or system requirements. The Mechanical Equipment and Subsystems Integrity Program MECSIP is implemented in the planning process and continued until retirement of the system.

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Program Milestone

A

B

C

Acquisition Phase

Technology

Development

System Development and Demonstration

Production and

Deployment

Operations and

Support

Reviews and Audits

SRR

SDR(SFR)

PDR

CDR

FRR(IFR)

SVR

PCA

MECSIP TASK

TASK III Design Analyses and Development Tests (5.3)

Manufacturing Quality

Assessment (5.3.1)

•  Initial assessment

•  Update

•  Update

•  Final

Design analyses

(5.3.2)

•  Analysis initiated

•  Component designs reflect accommodation of requirements

•  Preliminary design analysis initiated

•  Component designs reflect accommodation of requirements

•  Component

failure mechanism assessment

established

•  Design system used to finalize design

•  FMECA updated

•  FRACAS

implemented

•  Analysis updated with subsystems test data for those environments

deemed critical to safety of flight

•  Analysis updated and validated to provide identified flight limitations

•  Analysis updated with test data for all required operating environments

•  Reliability and maintainability predictions updated

•  FMECA updated

•  FRACAS updated

•  Maintenance publications validated

•  Mechanical subsystems monitored to provide basis for changes to operational hardware or upgrade programs

Load analyses

(5.3.2.1)

•  Initial

•  Update

•  Update

•  Update

•  Update

•  Loads/environmental spectra survey documented

Design stress/environment spectra development (5.3.2.2)

•  Initial

•  Update

•  Update

•  Update

•  Update

Performance and function sizing analyses (5.3.2.3)

•  Initial

•  Update

•  Update

•  Update

Thermal/environmental analyses and tests (5.3.2.4)

•  Installed location environments established

•  Conduct initial analysis

•  Update installed location    for subsystems equipment complete

•  Develop Environmental Criteria Document (ECD)

•  Update to analysis

•  Thermal profiles created for both ambient and operational transient conditions

•  Update

•  Update

Stress/strength analyses

(5.3.2.5)

•  Initial

•  Update

•  Update

•  Update

•  Update

Durability analyses

(5.3.2.6)

•  Initial

•  Update

•  Update

•  Update

•  Update

Damage tolerance analyses

(5.3.2.7)

•  Initial

•  Update

•  Update

•  Update

•  Update

Risk-based analyses

(5.3.2.8)

•  Initial

•  Update

•  Update

•  Update

•  Update