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Aging Systems

Aging Systems. Vi Lipski, FAA Vic Card, JAA. Topics. Background Enhanced Airworthiness Program for Airplane Systems (EAPAS) Enhancement Areas Enhancement Categories Research and Development EAPAS Status Summary. Aging Systems Background. TWA 800 Aging Wiring Issues (1996).

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Aging Systems

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  1. Aging Systems Vi Lipski, FAA Vic Card, JAA

  2. Topics • Background • Enhanced Airworthiness Program for Airplane Systems (EAPAS) • Enhancement Areas • Enhancement Categories • Research and Development • EAPAS Status • Summary

  3. Aging Systems Background TWA 800 Aging Wiring Issues (1996) White House Commission on Safety and Security Recommendation: Expand Aging Program to include non-structural systems Aging Non-Structural Systems Study Team Formed Aging Transport Non-Structural Systems Plan Developed (1998) • R & D Projects • Wiring • - Inspection • - Testing • - Safety Anal. • - Design • - Separation • - Arc Fault CB • Mechanical Sys • Improvement Recommendations • Exiting Designs • Maintenance • Training • Regulations • R & D • Fuel System • Reporting • Wire Installation Drawings Aging Transport Sys Rulemaking Advisory Committee (ATSRAC) (1999) New Policy: Wire Installation Requirements Fuel Tank Program SFAR 88

  4. Enhanced Airworthiness Program for Airplane Systems EAPAS is designed to enhance current airplane systems airworthiness programs at operator facilities, repair stations, and manufacturing plants based on data-driven initiatives developed under the Aging Transport Non-Structural Systems Plan.

  5. Enhancement Areas The EAPAS implementation plan is organized into six major categories covering design, certification and maintenance of transport airplanes: • Training • Maintenance • Design • Research and Development • Wire Reporting • Information Sharing and Outreach

  6. Enhancement Categories Near-Term • Raise awareness about aging system issues: • Enhancements/changes in training and maintenance programs • Training for FAA inspectors, engineers, and designees • Wiring Installation Policy Longer-Term • Establishment of aging systems management: • Changes in inspections and Instructions for Continued Airworthiness • Changes to FARs for improvements in certification and maintenance

  7. EAPAS Major R&D Projects • Development of new technologies for wire testing/inspection (NDI) • Development of wire separation/segregation requirements • Development of wire performance requirements • Study effects of related and unrelated maintenance on wiring • Development of Arc Fault Circuit Breakers (AFCB) • Aging Mechanical Systems Studies

  8. EAPAS Status Near-Term: • All EAPAS Near-Term enhancements have been accomplished. Examples are: • Issued a new policy on requirements for wiring installation drawing. • Developed an 8-hour “aircraft wiring practices” training, all FAA engineers and inspectors have received the training. • Developed an “aircraft wiring practices” Job Aid and placed on the internet to be used by all technical communities.

  9. EAPAS Status Longer-Term: • All ATSRAC reports completed and received by the FAA January 2003. • Assessment of aging issues in small transport airplanes (6-30 pax) wiring has been completed. • The longer-term enhancements are expected to be completed by the end of 2004. Some R&D projects may take longer due to their large scope and/or continuous nature.

  10. EAPAS Status continued Research & Development: • Aging Mechanical System Study (controls, hydraulics, etc.) is underway. • Single-phase AC arc fault circuit breakers (AFCB) have been developed and installed on commercial airplanes for data collection. • Three-phase and DC AFCBs are being developed. • Other projects such as non-destructive inspection (NDI) are in development.

  11. EAPAS Status continued Rulemaking: • FAA in process of rulemaking based on the ATSRAC recommendations. • Noticed of Proposed Rulemaking (NPRM) is planned to be published in 3rd quarter 2004. • All rulemaking and related activities are in process with a full coordination and harmonization with the JAA and TCCA.

  12. EAPAS Status continued • Outstanding issues with rulemaking: • Preliminary cost/benefit analysis may not support the implementation of all recommended enhancements solely by rulemaking. • Therefore, FAA, in conjunction with international regulatory authorities, may consider means other than rulemaking for implementation of some of the enhancements as appropriate.

  13. ATSRAC: New Tasks FAA is in process of tasking ATRAC with the following items: • Task 11 – To: • If requested, advise FAA on alternatives to the proposed rulemaking • Assist in disposition of comments from an EAPAS NPRM • Provide technical and economic data • Task 12 – Assist in review and implementation of aircraft system R&D products • Task 13 – Develop an enhanced wiring inspection for small transport airplanes

  14. Summary • Participation of international airworthiness authorities and industry is vitally important in successful implementation of EAPAS program. • Implementation of the EAPAS near-term and longer-term improvements will mitigate the potential safety concerns in aircraft wire systems. • The proactive mechanical systems study will successfully identify possible aging issues in the transport mechanical systems. • With addition of the aging small transport airplane systems study, a wide coverage of aging issues for both large and small transport airplane categories is ensured.

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