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844 

14 CFR Ch. I (1–1–19 Edition) 

§ 39.27 

§ 39.27

What do I do if the airworthi-

ness directive conflicts with the 
service document on which it is 
based? 

In some cases an airworthiness direc-

tive incorporates by reference a manu-
facturer’s service document. In these 
cases, the service document becomes 
part of the airworthiness directive. In 
some cases the directions in the service 
document may be modified by the air-
worthiness directive. If there is a con-
flict between the service document and 
the airworthiness directive, you must 
follow the requirements of the air-
worthiness directive. 

PART 43—MAINTENANCE, PREVEN-

TIVE MAINTENANCE, REBUILD-
ING, AND ALTERATION 

Sec. 
43.1

Applicability. 

43.2

Records of overhaul and rebuilding. 

43.3

Persons authorized to perform mainte-

nance, preventive maintenance, rebuild-
ing, and alterations. 

43.5

Approval for return to service after 

maintenance, preventive maintenance, 
rebuilding, or alteration. 

43.7

Persons authorized to approve aircraft, 

airframes, aircraft engines, propellers, 
appliances, or component parts for re-
turn to service after maintenance, pre-
ventive maintenance, rebuilding, or al-
teration. 

43.9

Content, form, and disposition of main-

tenance, preventive maintenance, re-
building, and alteration records (except 
inspections performed in accordance 
with part 91, part 123, part 125, 
§ 135.411(a)(1), and § 135.419 of this chap-
ter). 

43.10

Disposition of life-limited aircraft 

parts. 

43.11

Content, form, and disposition of 

records for inspections conducted under 
parts 91 and 125 and §§ 135.411(a)(1) and 
135.419 of this chapter. 

43.12

Maintenance records: Falsification, re-

production, or alteration. 

43.13

Performance rules (general). 

43.15

Additional performance rules for in-

spections. 

43.16

Airworthiness Limitations. 

43.17

Maintenance, preventive maintenance, 

and alterations performed on U.S. aero-
nautical products by certain Canadian 
persons. 

A

PPENDIX

TO

P

ART

43—M

AJOR

A

LTER

-

ATIONS

, M

AJOR

R

EPAIRS

AND

P

REVENTIVE

 

M

AINTENANCE

 

A

PPENDIX

TO

P

ART

43—R

ECORDING

OF

 

M

AJOR

R

EPAIRS AND

M

AJOR

A

LTERATIONS

 

A

PPENDIX

TO

P

ART

43 [R

ESERVED

A

PPENDIX

TO

P

ART

43—S

COPE AND

D

ETAIL

 

OF

I

TEMS

(

AS

A

PPLICABLE TO THE

P

AR

-

TICULAR

A

IRCRAFT

) T

O

B

E

I

NCLUDED

IN

 

A

NNUAL AND

100-H

OUR

I

NSPECTIONS

 

A

PPENDIX

TO

P

ART

43—A

LTIMETER

S

YSTEM

 

T

EST AND

I

NSPECTION

 

A

PPENDIX

TO

P

ART

43—ATC T

RANSPONDER

 

T

ESTS AND

I

NSPECTIONS

 

A

UTHORITY

: 42 U.S.C. 7572; 49 U.S.C. 106(f), 

106(g), 40105, 40113, 44701–44702, 44704, 44707, 
44709, 44711, 44713, 44715, 45303. 

S

OURCE

: Docket No. 1993, 29 FR 5451, Apr. 

23, 1964, unless otherwise noted. 

E

DITORIAL

N

OTE

: For miscellaneous tech-

nical amendments to this part 43, see Amdt. 
43–3, 31 FR 3336, Mar. 3, 1966, and Amdt. 43– 
6, 31 FR 9211, July 6, 1966. 

§ 43.1

Applicability. 

(a) Except as provided in paragraphs 

(b) and (d) of this section, this part pre-
scribes rules governing the mainte-
nance, preventive maintenance, re-
building, and alteration of any— 

(1) Aircraft having a U.S. airworthi-

ness certificate; 

(2) Foreign-registered civil aircraft 

used in common carriage or carriage of 
mail under the provisions of Part 121 or 
135 of this chapter; and 

(3) Airframe, aircraft engines, propel-

lers, appliances, and component parts 
of such aircraft. 

(b) This part does not apply to— 
(1) Any aircraft for which the FAA 

has issued an experimental certificate, 
unless the FAA has previously issued a 
different kind of airworthiness certifi-
cate for that aircraft; 

(2) Any aircraft for which the FAA 

has issued an experimental certificate 
under the provisions of § 21.191(i)(3) of 
this chapter, and the aircraft was pre-
viously issued a special airworthiness 
certificate in the light-sport category 
under the provisions of § 21.190 of this 
chapter; or 

(3) Any aircraft subject to the provi-

sions of part 107 of this chapter. 

(c) This part applies to all life-lim-

ited parts that are removed from a 
type certificated product, segregated, 
or controlled as provided in § 43.10. 

(d) This part applies to any aircraft 

issued a special airworthiness certifi-
cate in the light-sport category except: 

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