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Test Criteria and Procedures, for
Aircraft Wire
• Task 1 – Review of Current Wire
Specifications – complete
• Task 2 – Obtain Wire Performance Field
Data – complete
• Task 3 – Evaluation/Assessment of Field
Data vs. Performance Specifications – Mar
2003
• Task 4 – Draft Minimum Wire Performance
Specification – Mar 2003
Aircraft Wire Performance
Evaluation of Aircraft Wiring Separation
and Segregation Requirements and
Practices
Tasks
• Obtain and analyze electrical failure data relevant
to separation and segregation – Aug 2003
• Identify failure modes that render the applicable
separation and segregation requirement inadequate
or otherwise reducing the effectiveness of the
safety margin – Oct 2003.
Wiring Separation and Segregation
Tasks
• Develop potential improvements – Feb 2004
• Conduct tests as necessary to investigate
current requirements, support investigation
and verification of potential improvements –
Mar 2004
• Draft final report – May 2004
Wiring Separation and Segregation
Effects of Related & Unrelated
Maintenance on the Integrity of Aircraft
Electrical Interconnect Systems
Tasks
• Conduct an empirical evaluation of maintenance
processes and effects.
• Evaluate collateral maintenance effects such as
contamination of wire bundles, and insulation
blankets.
• Simulate maintenance conditions to quantify
maintenance effects
• Completion – Sep 2003
Maintenance Effects
Evaluation of Mixed Wire Types
• Review wiring practices related to mixing of
wire types
• Review of wire properties relative to mixing
• Testing
• Final report
• Completion – Sep 2003
Evaluation of Mixed Wire Types
Arc Fault Circuit Breaker:
Phase II
• 28VDC and 115V/3-phase prototypes –
Dec 2003
• Flight Testing - 2005
AFCB Phase II
Advanced Risk Assessment Methods for
Aircraft Electrical Systems
Advanced Risk Assessment Methods
for Aircraft Electrical Systems
• Develop tools to enhance the risk
assessment process and facilitate
compliance with new and proposed
rulemaking
• Contract Award: March 2002
• Completion: August 2004
• Lectromec
Questions
FAA Aging Mechanical Systems
Research Program Update
Prepared for:
Aging Transport Systems Rulemaking Advisory Committee
January 23, 2003
Robert McGuire ?Federal Aviation Administration
Aging Electrical Systems Research Program ?AAR-480
609-485-4494
Aging Mechanical Systems
Background
• FAA mandated by Congress to address
Aging Systems
• Mandate includes both electrical and
mechanical systems
• Mechanical systems research in its early
stages
• Chance to be proactive in safety research
Objective
FAA Aging Mechanical Systems research
program aims to develop technology and
techniques to ensure the continued safe
operation of aircraft mechanical systems
Current Research
• Overall General Risk and Maintenance
Assessment
• Destructive Testing of Flight Control
Linkages
• Failsafe Continue-to-Operate Jackscrews
• Transport Aircraft Rudder Investigation
Overall General Risk and
Maintenance Assessment
• Phase I: Flight Control Systems
• Phase I Project I: One axis of control systems on
A320 and B757
– Models are chosen to develop evaluation procedures
– Partnering with Boeing , Airbus, and JAA
• Approach
– Part 1: Assessment of the design and service history
associated with each flight control.
– Part 2: Assessment of manufacturer’s maintenance
instructions associated with each flight control.
Destructive Testing of Flight
Control Linkages
• Assess the condition of flight control linkages
on aging aircraft
• Main effort Single Element-Dual Load Path
• Possibly Single Element Single Load Path
Characterization of Test Bed
Aircraft
• To assist the study of aging systems a test
bed airplane (B747) is available to support
investigations of mechanical systems and
their relationship/interactions
• Asses which mechanical systems are
functioning and to what extent
• Determine requirements for repair of
nonfunctioning systems
Failsafe Continue-to-Operate
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