484 

14 CFR Ch. I (1–1–19 Edition) 

§ 26.47 

this section must be submitted by June 
30, 2009. 

(3) For alteration data approved on 

or after January 11, 2008, DT data re-
quired by paragraph (c)(2) of this sec-
tion must be submitted before initial 
approval of the alteration data. 

(4) For repair data developed and ap-

proved before January 11, 2008, the DT 
data required by paragraph (d)(2) of 
this section must be submitted by June 
30, 2009. 

(5) For repair data developed and ap-

proved after January 11, 2008, the DT 
data required by paragraph (d)(2) of 
this section must be submitted within 
12 months after initial approval of the 
repair data and before making the DT 
data available to persons required to 
comply with §§ 121.1109 and 129.109 of 
this chapter. 

[Doc. No. FAA–2005–21693, 72 FR 70505, Dec. 
12, 2007, as amended by Amdt. 26–4, 75 FR 
11734, Mar. 12, 2010; Doc. No. FAA–2018–0119, 
Amdt. 26–7, 83 FR 9170, Mar. 5, 2018] 

§ 26.47

Holders of and applicants for a 

supplemental type certificate—Al-
terations and repairs to alterations. 

(a) 

Applicability. 

This section applies 

to transport category airplanes subject 
to § 26.43. 

(b) 

Fatigue critical alteration structure. 

For existing structural alteration data 
approved under a supplemental certifi-
cate, the holder of the supplemental 
certificate must— 

(1) Review the alteration data and 

identify all alterations that affect fa-
tigue critical baseline structure identi-
fied under § 26.43(b)(1); 

(2) For each alteration identified 

under paragraph (b)(1) of this section, 
identify any fatigue critical alteration 
structure; 

(3) Develop and submit to the respon-

sible Aircraft Certification Service of-
fice for review and approval a list of 
the structure identified under para-
graph (b)(2) of this section; and 

(4) Upon approval, make the list re-

quired in paragraph (b)(3) of this sec-
tion available to persons required to 
comply with §§ 121.1109 and 129.109 of 
this chapter. 

(c) 

DT Data. 

For existing and future 

alteration data developed by the holder 
of a supplemental type certificate that 
affect fatigue critical baseline struc-

ture identified under § 26.43(b)(1), unless 
previously accomplished, the holder of 
a supplemental type certificate must— 

(1) Perform a DTE and develop the 

DTI for the alteration and fatigue crit-
ical baseline structure that is affected 
by the alteration; 

(2) Submit the DT data developed in 

accordance with paragraphs (c)(1) of 
this section to the responsible Aircraft 
Certification Service office or its prop-
erly authorized designees for review 
and approval; and 

(3) Upon approval, make the DTI 

available to persons required to comply 
with §§ 121.1109 and 129.109 of this chap-
ter. 

(d) 

DT Data for Repairs Made to Alter-

ations. 

For existing and future repair 

data developed by the holder of a sup-
plemental holder of a supplemental 
type certificate, the holder of a supple-
mental type certificate must— 

(1) Review the repair data, and iden-

tify each repair that affects any fa-
tigue critical alteration structure iden-
tified under paragraph (b)(2) of this sec-
tion; 

(2) For each repair identified under 

paragraph (d)(1) of this section, unless 
previously accomplished, perform a 
DTE and develop DTI; 

(3) Submit the DT data developed in 

accordance with paragraph (d)(2) of 
this section to the responsible Aircraft 
Certification Service office or its prop-
erly authorized designees for review 
and approval; and 

(4) Upon approval, make the DTI 

available to persons required to comply 
with §§ 121.1109 and 129.109 of this chap-
ter. 

(e) 

Compliance times. 

Holders of sup-

plemental type certificates must sub-
mit the following to the responsible 
Aircraft Certification Service office or 
its properly authorized designees for 
review and approval by the specified 
compliance time: 

(1) The list of fatigue critical alter-

ation structure required by paragraph 
(b)(3) of this section must be submitted 
no later than 360 days after January 11, 
2008. 

(2) For alteration data developed and 

approved before January 11, 2008, the 
DT data required by paragraph (c)(2) of 
this section must be submitted by June 
30, 2009. 

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