Thu, Aug 12, 2010
Comments Are Due To The FAA By August 29
The FAA has published a draft policy (ANM-113-10-004) on the
certification of permanently installed rechargeable lithium
batteries.
The policy memo provides guidance on permanently installed (part
of the type certificate or supplemental type certificate)
rechargeable lithium batteries or rechargeable lithium battery
systems and their protective circuitry used on transport-category
aircraft.
According to the document, increased use of rechargeable lithium
batteries and battery systems located in many areas of the aircraft
has prompted the FAA to review the adequacy of existing
regulations. The FAA's review indicates the existing regulations do
not adequately address several failure, operation and maintenance
characteristics of newly developed batteries and battery systems,
which could affect the safety and reliability of the
electronics-system installation. Specifically, this policy
addresses new batteries and battery systems requirements not
adequately addressed in Title 14, Code of Federal Regulations
25.1353. Special conditions may be required for these systems.
The intent of the policy is to establish when special conditions
will be proposed and what the proposed special conditions will be,
as well as to provide a standardized approach on how to show
compliance for these newly developed battery and battery systems,
including their installations. This policy also will ensure, as
required by §25.601 and §25.1309, that they do not
represent a hazard to the aircraft and its occupants.
According to the FAA, the general policy stated in the document
does not constitute a new regulation. The FAA official who
implements this policy should follow this policy when it is
applicable to a specific project. Whenever a proposed method of
compliance is outside this established policy, that official has to
coordinate it with the policy-issuing office using an issue
paper.
Applicants should expect that certificating officials would
consider this information when making findings of compliance
relevant to new certification. In addition, as with all advisory
material, this statement of policy identifies one means, but not
the only means, of compliance. Any alternate means of compliance
must be coordinated between the Aircraft Certification Office and
Transport Airplane Directorate. The FAA has concluded that current
regulations may not adequately address all of the safety concerns
of newly developed batteries and battery systems, and their effects
on other systems. In the event that data are presented to the FAA
which demonstrate otherwise, the intent and content of this policy
may be reconsidered.
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