628
14 CFR Ch. I (1–1–14 Edition)
§ 26.35
Office not less than 60 days before the
compliance times specified in those
paragraphs.
(4) A proposal for how the approved
service information and any necessary
modification parts will be made avail-
able to affected persons.
(i) Each affected type certificate
holder must implement the compliance
plans, or later revisions, as approved
under paragraph (g) and (h) of this sec-
tion.
[Doc. No. FAA–2005–22997, 73 FR 42499, July
21, 2008, as amended by Amdt. 26–3, 74 FR
31619, July 2, 2009]
§ 26.35
Changes to type certificates af-
fecting fuel tank flammability.
(a)
Applicability. This section applies
to holders and applicants for approvals
of the following design changes to any
airplane subject to 14 CFR 26.33(a):
(1) Any fuel tank designed to be Nor-
mally Emptied if the fuel tank instal-
lation was approved pursuant to a sup-
plemental type certificate or a field ap-
proval before December 26, 2008;
(2) Any fuel tank designed to be Nor-
mally Emptied if an application for a
supplemental type certificate or an
amendment to a type certificate was
made before December 26, 2008 and if
the approval was not issued before De-
cember 26, 2008; and
(3) If an application for a supple-
mental type certificate or an amend-
ment to a type certificate is made on
or after December 26, 2008, any of the
following design changes:
(i) Installation of a fuel tank de-
signed to be Normally Emptied,
(ii) Changes to existing fuel tank ca-
pacity, or
(iii) Changes that may increase the
flammability exposure of an existing
fuel tank for which FRM or IMM is re-
quired by § 26.33(c).
(b)
Flammability Exposure Analysis—(1)
General. By the times specified in para-
graphs (b)(1)(i) and (b)(1)(ii) of this sec-
tion, each person subject to this sec-
tion must submit for approval a flam-
mability exposure analysis of the aux-
iliary fuel tanks or other affected fuel
tanks, as defined in the type design, to
the FAA Oversight Office. This anal-
ysis must be conducted in accordance
with Appendix N of part 25 of this chap-
ter.
(i) Holders of supplemental type cer-
tificates and field approvals: Within 12
months of December 26, 2008,
(ii) Applicants for supplemental type
certificates and for amendments to
type certificates: Within 12 months
after December 26, 2008, or before the
certificate is issued, whichever occurs
later.
(2)
Exception. This paragraph does not
apply to—
(i) Fuel tanks for which the type cer-
tificate holder, supplemental type cer-
tificate holder, or field approval holder
has notified the FAA under paragraph
(f) of this section that it will provide
design changes and service instructions
for an IMM meeting the requirements
of § 25.981(c) in effect December 26, 2008;
and
(ii) Fuel tanks substantiated to be
conventional unheated aluminum wing
tanks.
(c)
Impact Assessment. By the times
specified in paragraphs (c)(1) and (c)(2)
of this section, each person subject to
paragraph (a)(1) of this section holding
an approval for installation of a Nor-
mally Emptied fuel tank on an airplane
model listed in Table 1 of this section,
and each person subject to paragraph
(a)(3)(iii) of this section, must submit
for approval to the FAA Oversight Of-
fice an assessment of the fuel tank sys-
tem, as modified by their design
change. The assessment must identify
any features of the design change that
compromise any critical design con-
figuration control limitation (CDCCL)
applicable to any airplane on which the
design change is eligible for installa-
tion.
(1) Holders of supplemental type cer-
tificates and field approvals: Before
June 26, 2011.
(2) Applicants for supplemental type
certificates and for amendments to
type certificates: Before June 26, 2011
or before the certificate is issued,
whichever occurs later.
T
ABLE
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