spaschal on DSK3GDR082PROD with CFR

Federal Aviation Administration, DOT

Section 25.1711

adequate physical separation from hydraulic lines and other hydraulic system components, so that:
(1) An EWIS component failure will
not create a hazardous condition.
(2) Any hydraulic fluid leakage onto
EWIS components will not create a
hazardous condition.
(g) Except to the extent necessary to
provide electrical connection to the oxygen systems components, EWIS must
be designed and installed with adequate physical separation from oxygen
lines and other oxygen system components, so that an EWIS component failure will not create a hazardous condition.
(h) Except to the extent necessary to
provide electrical connection to the
water/waste
systems
components,
EWIS must be designed and installed
with adequate physical separation from
water/waste lines and other water/
waste system components, so that:
(1) An EWIS component failure will
not create a hazardous condition.
(2) Any water/waste leakage onto
EWIS components will not create a
hazardous condition.
(i) EWIS must be designed and installed with adequate physical separation between the EWIS and flight or
other mechanical control systems cables and associated system components, so that:
(1) Chafing, jamming, or other interference are prevented.
(2) An EWIS component failure will
not create a hazardous condition.
(3) Failure of any flight or other mechanical control systems cables or systems components will not damage the
EWIS and create a hazardous condition.
(j) EWIS must be designed and installed with adequate physical separation between the EWIS components
and heated equipment, hot air ducts,
and lines, so that:
(1) An EWIS component failure will
not create a hazardous condition.
(2) Any hot air leakage or heat generated onto EWIS components will not
create a hazardous condition.
(k) For systems for which redundancy is required, by certification
rules, by operating rules, or as a result
of the assessment required by Section 25.1709,
EWIS components associated with

those systems must be designed and installed with adequate physical separation.
(l) Each EWIS must be designed and
installed so there is adequate physical
separation between it and other aircraft components and aircraft structure, and so that the EWIS is protected
from sharp edges and corners, to minimize potential for abrasion/chafing, vibration damage, and other types of mechanical damage.
Section 25.1709

System safety: EWIS.

Each EWIS must be designed and installed so that:
(a) Each catastrophic failure condition - 
(1) Is extremely improbable; and
(2) Does not result from a single failure.
(b) Each hazardous failure condition
is extremely remote.
Section 25.1711 Component
EWIS.

identification:

(a) EWIS components must be labeled
or otherwise identified using a consistent method that facilitates identification of the EWIS component, its
function, and its design limitations, if
any.
(b) For systems for which redundancy
is required, by certification rules, by
operating rules, or as a result of the assessment required by Section 25.1709, EWIS
components associated with those systems must be specifically identified
with component part number, function,
and separation requirement for bundles.
(1) The identification must be placed
along the wire, cable, or wire bundle at
appropriate intervals and in areas of
the airplane where it is readily visible
to maintenance, repair, or alteration
personnel.
(2) If an EWIS component cannot be
marked physically, then other means
of identification must be provided.
(c) The identifying markings required by paragraphs (a) and (b) of this
section must remain legible throughout the expected service life of the
EWIS component.
(d) The means used for identifying
each EWIS component as required by
this section must not have an adverse

373

VerDate Sep<11>2014

12:50 Apr 30, 2019

Jkt 247046

PO 00000

Frm 00383

Fmt 8010

Sfmt 8010

Y:\SGML\247046.XXX

247046