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Reliability Software, Safety and Quality Solutions / Software / Safety Software / Master Minimum Equipment List (MMEL)

Master Minimum Equipment List (MMEL)

The Master Minimum Equipment List (MMEL) is a document which lists the equipment that may temporarily be inoperative, subject to certain conditions, whilst maintaining an acceptable level of safety as intended in the applicable documents. Each MMEL document is specific to an aircraft type.

MMEL analysis is required for all aircraft manufacturers to certify aircraft safety in different aviation authorities such as FAA, EASA etc.

RAM Commander integrated MMEL module supports Master Minimum Equipment List generation using Reliability, FMECA, FHA (Safety) and FTA modules results.
Master Minimum Equipment List (MMEL)

RAM Commander's MMEL module main features:
  • Compliance with MMEL requirements
  • Integration with aircraft Reliability and Safety analyses modules
  • Candidate Item selection
  • Calculation (s) of Expected Probability before and after failure
  • Automatic identification of the next (first in flight) and second worst failures
  • Reports generation:

    Standard MMEL: "Five Column Format" - presents the standard MMEL report

    Detailed Quantitative Analysis - presents results of analysis on which MMEL selection has been made

    MMEL module provides several algorithms for MMEL candidate selection:
  • Algorithm based on JAA MMEL development guidelines
  • Algorithm implementing RRJ - 95/75 guidelines
    User may select appropriate algorithm for system analysis.

    Below is an example of standard MMEL 5-column report as generated by RAM Commander:
    MMEL 5-column report


    Functional Packages:
    PREDICTOR
    • 5 Standard Operating Reliability Prediction Methods
    • BOM Builder, Temperature Curves, Mission Profile, and Import Wizard
    • Full set of ready-to-print Reliability Reports
    • Enhanced Report Generator for user defined reports

    RELIABILITY PRO

    • 5 Standard Operating Reliability Prediction Methods
    • BOM Builder, Temperature Curves, Mission Profile, and  Import Wizard
    • User Defined Components Reliability Data Module
    • Full set of ready-to-print Reliability Reports
    • Enhanced Report Generator for user defined reports
    • Components Library Module (over 400k components)
    • RBD - Reliability Block Diagram

    MAINTAINABILITY PRO

    • Maintainability Module (according to MIL-STD-472 Procedure 5A)
    • Built in libraries for Tasks, Times, STE, Skills, and Materials
    • Maintenance Engineering Report (MEA Report)
    • Maintenance Task Analysis Report
    • Full set of ready-to-print Reliability Reports
    • ILS Supprt Fields (user defined)
    • BOM Builder, Temperature Curves, Mission Profile & Import Wizard
    • Enhanced Report Generator for user defined reports
    • RCM/MSG-3 Module
    • FMECA Module

    FAILURE ANALYSIS & ISOLATION

    • BOM Builder, and Import Wizard
    • FMECA (covering both Hardware & Functional) Module
    • Customizable FMECA Worksheet
    • FTA Module
    • FMECA Import/Export
    • Testability Module
    • Full set of FMECA & FTA ready-to-print Reports
    • Full set of ready-to-print Testability Reports including graphical trouble shooting, fault isolation, etc.
    • FMD-97 Library
    • Enhanced Report Generator for user defined reports

    SAFETY ASSESSMENT

    • SSA supporting IEC 61508 (Safety Standard for Safety Instrumented Systems) and MIL-STD-882D (SHA, O&SHA), SAE, ARP 4754A, and ARP4761
    • Customizable FMECA Worksheet
    • FTA Module
    • RBD Module
    • Markov Chains Module
    • FMECA Import/Export
    • Full set of ready-to-print Safety Reports
    • Enhanced Report Generator for user defined reports

    AVIATION SAFETY

    • SSA & FHA according to SAE, ARP 4754A, ARP4761, and FAR 25 1309b
    • FTA including ready-to print reports
    • MSG-3 (System, Zonal, and Structural) including ready-to-print reports
    • MMEL including ready-to-print 5-column report
    • FMECA including ready-to-print FMECA reports, BOM Builder, and Import Wizard
    • Enhanced Report Generator for user defined reports
    • Report Template Utility for layout customization

    See also:
    RAM Commander
    FMECA
    Fault Tree Analysis
    Safety Assessment


 
 
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