Section 139.307

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

(c) FAA Advisory Circulars contain
methods and procedures for the maintenance and configuration of paved
areas that are acceptable to the Administrator.
[Doc. No. FAA-2000-7479, 69 FR 6424, Feb. 10,
2004; Amdt. 139-26, 69 FR 31522, June 4, 2004]

Section 139.307 Unpaved areas.
(a) In a manner authorized by the Administrator, each certificate holder
must maintain and promptly repair the
surface of each gravel, turf, or other
unpaved runway, taxiway, or loading
ramp and parking area on the airport
that is available for air carrier use as
follows:
(1) No slope from the edge of the fullstrength surfaces downward to the existing terrain must be steeper than 2:1.
(2) The full-strength surfaces must
have adequate crown or grade to assure
sufficient drainage to prevent ponding.
(3) The full-strength surfaces must be
adequately compacted and sufficiently
stable to prevent rutting by aircraft or
the loosening or build-up of surface
material, which could impair directional control of aircraft or drainage.
(4) The full-strength surfaces must
have no holes or depressions that exceed 3 inches in depth and are of a
breadth capable of impairing directional control or causing damage to an
aircraft.
(5) Debris and foreign objects must be
promptly removed from the surface.
(b) FAA Advisory Circulars contain
methods and procedures for the maintenance and configuration of unpaved
areas that are acceptable to the Administrator.
Section 139.309 Safety areas.
(a) In a manner authorized by the Administrator, each certificate holder
must provide and maintain, for each
runway and taxiway that is available
for air carrier use, a safety area of at
least the dimensions that - 
(1) Existed on December 31, 1987, if
the runway or taxiway had a safety
area on December 31, 1987, and if no reconstruction or significant expansion
of the runway or taxiway was begun on
or after January 1, 1988; or
(2) Are authorized by the Administrator at the time the construction, reconstruction, or expansion began if

construction, reconstruction, or significant expansion of the runway or
taxiway began on or after January 1,
1988.
(b) Each certificate holder must
maintain its safety areas as follows:
(1) Each safety area must be cleared
and graded and have no potentially
hazardous ruts, humps, depressions, or
other surface variations.
(2) Each safety area must be drained
by grading or storm sewers to prevent
water accumulation.
(3) Each safety area must be capable
under dry conditions of supporting
snow removal and aircraft rescue and
firefighting equipment and of supporting the occasional passage of aircraft without causing major damage to
the aircraft.
(4) No objects may be located in any
safety area, except for objects that
need to be located in a safety area because of their function. These objects
must be constructed, to the extent
practical, on frangibly mounted structures of the lowest practical height,
with the frangible point no higher than
3 inches above grade.
(c) FAA Advisory Circulars contain
methods and procedures for the configuration and maintenance of safety
areas acceptable to the Administrator.
Section 139.311 Marking, signs, and lighting.
(a) Marking. Each certificate holder
must provide and maintain marking
systems for air carrier operations on
the airport that are authorized by the
Administrator and consist of at least
the following:
(1) Runway markings meeting the
specifications for takeoff and landing
minimums for each runway.
(2) A taxiway centerline.
(3) Taxiway edge markings, as appropriate.
(4) Holding position markings.
(5) Instrument landing system (ILS)
critical area markings.
(b) Signs. (1) Each certificate holder
must provide and maintain sign systems for air carrier operations on the
airport that are authorized by the Administrator and consist of at least the
following:
(i) Signs identifying taxiing routes
on the movement area.
(ii) Holding position signs.

562

VerDate Sep<11>2014

08:20 May 17, 2019

Jkt 247048

PO 00000

Frm 00572

Fmt 8010

Sfmt 8010

Y:\SGML\247048.XXX

247048