Pt. 39

14 CFR Ch. I (1-1-19 Edition)

whichever is greater, above the reference
track and throughout the 10 dB-down time
interval.
K7.9 The tiltrotor altitude must not vary
during each flyover by more than Section30 ft (Section9
m) from the reference altitude throughout
the 10 dB-down time interval.
K7.10 During the approach procedure, the
tiltrotor must establish a stabilized constant
speed approach and fly between approach angles of 5.5 degrees and 6.5 degrees throughout
the 10 dB-down time interval.
K7.11 During all test procedures, the
tiltrotor weight (mass) must not be less than
90 percent and not more than 105 percent of
the maximum certificated weight (mass).
For each of the test procedures, complete at
least one test at or above this maximum certificated weight (mass).
K7.12 A tiltrotor capable of carrying external loads or external equipment must be
noise certificated without such loads or
equipment fitted
K7.13 The value of VCON used for noise certification must be included in the approved
Flight Manual.
[78 FR 1139, Jan. 8, 2013]

spaschal on DSK3GDR082PROD with CFR

PART 39 - AIRWORTHINESS
DIRECTIVES
Sec.
39.1 Purpose of this regulation.
39.3 Definition of airworthiness directives.
39.5 When does FAA issue airworthiness directives?
39.7 What is the legal effect of failing to
comply with an airworthiness directive?
39.9 What if I operate an aircraft or use a
product that does not meet the requirements of an airworthiness directive?
39.11 What actions do airworthiness directives require?
39.13 Are airworthiness directives part of
the Code of Federal Regulations?
39.15 Does an airworthiness directive apply
if the product has been changed?
39.17 What must I do if a change in a product affects my ability to accomplish the
actions required in an airworthiness directive?
39.19 May I address the unsafe condition in
a way other than that set out in the airworthiness directive?
39.21 Where can I get information about
FAA-approved alternative methods of
compliance?
39.23 May I fly my aircraft to a repair facility to do the work required by an airworthiness directive?
39.25 How do I get a special flight permit?
39.27 What do I do if the airworthiness directive conflicts with the service document on which it is based?
AUTHORITY: 49 U.S.C. 106(g), 40113, 44701.

SOURCE: Docket No. FAA-2000-8460, 67 FR
48003, July 22, 2002, unless otherwise noted.

Section 39.1

Purpose of this regulation.

The regulations in this part provide a
legal framework for FAA-s system of
Airworthiness Directives.
Section 39.3 Definition of airworthiness directives.
FAA-s airworthiness directives are
legally enforceable rules that apply to
the following products: aircraft, aircraft engines, propellers, and appliances.
Section 39.5 When does FAA issue airworthiness directives?
FAA issues an airworthiness directive addressing a product when we find
that:
(a) An unsafe condition exists in the
product; and
(b) The condition is likely to exist or
develop in other products of the same
type design.
Section 39.7 What is the legal effect of failing
to comply with an airworthiness directive?
Anyone who operates a product that
does not meet the requirements of an
applicable airworthiness directive is in
violation of this section.
Section 39.9 What if I operate an aircraft or
use a product that does not meet
the requirements of an airworthiness directive?
If the requirements of an airworthiness directive have not been met, you
violate Section 39.7 each time you operate the
aircraft or use the product.
Section 39.11 What actions do airworthiness
directives require?
Airworthiness directives specify inspections you must carry out, conditions and limitations you must comply
with, and any actions you must take to
resolve an unsafe condition.
Section 39.13 Are airworthiness directives
part of the Code of Federal Regulations?
Yes, airworthiness directives are part
of the Code of Federal Regulations, but

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