spaschal on DSK3GDR082PROD with CFR

Section 33.72

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

the screen before it reaches the capacity established in accordance with
paragraph (b)(3) of this section.
(7) Each strainer or filter required by
this paragraph must be accessible for
draining and cleaning.
(c) Oil tanks. (1) Each oil tank must
have an expansion space of not less
than 10 percent of the tank capacity.
(2) It must be impossible to inadvertently fill the oil tank expansion space.
(3) Each recessed oil tank filler connection that can retain any appreciable
quantity of oil must have provision for
fitting a drain.
(4) Each oil tank cap must provide an
oil-tight seal. For an applicant seeking
eligibility for an engine to be installed
on an airplane approved for ETOPS,
the oil tank must be designed to prevent a hazardous loss of oil due to an
incorrectly installed oil tank cap.
(5) Each oil tank filler must be
marked with the word  - oil. - 
(6) Each oil tank must be vented
from the top part of the expansion
space, with the vent so arranged that
condensed water vapor that might
freeze and obstruct the line cannot accumulate at any point.
(7) There must be means to prevent
entrance into the oil tank or into any
oil tank outlet, of any object that
might obstruct the flow of oil through
the system.
(8) There must be a shutoff valve at
the outlet of each oil tank, unless the
external portion of the oil system (including oil tank supports) is fireproof.
(9) Each unpressurized oil tank may
not leak when subjected to a maximum
operating temperature and an internal
pressure of 5 p.s.i., and each pressurized
oil tank must meet the requirements of
Section 33.64.
(10) Leaked or spilled oil may not accumulate between the tank and the remainder of the engine.
(11) Each oil tank must have an oil
quantity indicator or provisions for
one.
(12) If the propeller feathering system
depends on engine oil - 
(i) There must be means to trap an
amount of oil in the tank if the supply
becomes depleted due to failure of any
part of the lubricating system other
than the tank itself;

(ii) The amount of trapped oil must
be enough to accomplish the feathering
opeation and must be available only to
the feathering pump; and
(iii) Provision must be made to prevent sludge or other foreign matter
from affecting the safe operation of the
propeller feathering system.
(d) Oil drains. A drain (or drains)
must be provided to allow safe drainage
of the oil system. Each drain must - 
(1) Be accessible; and
(2) Have manual or automatic means
for positive locking in the closed position.
(e) Oil radiators. Each oil radiator
must withstand, without failure, any
vibration, inertia, and oil pressure load
to which it is subjected during the
block tests.
[Amdt. 33-6, 39 FR 35466, Oct. 1, 1974, as
amended by Amdt. 33-10, 49 FR 6852, Feb. 23,
1984; Amdt. 33-21, 72 FR 1877, Jan. 16, 2007;
Amdt. 33-27, 73 FR 55437, Sept. 25, 2008; Amdt.
33-27, 73 FR 57235, Oct. 2, 2008]

Section 33.72

Hydraulic actuating systems.

Each hydraulic actuating system
must function properly under all conditions in which the engine is expected to
operate. Each filter or screen must be
accessible for servicing and each tank
must meet the design criteria of Section 33.71.
[Amdt. 33-6, 39 FR 35467, Oct. 1, 1974]

Section 33.73

Power or thrust response.

The design and construction of the
engine must enable an increase - 
(a) From minimum to rated takeoff
power or thrust with the maximum
bleed air and power extraction to be
permitted in an aircraft, without overtemperature, surge, stall, or other detrimental factors occurring to the engine whenever the power control lever
is moved from the minimum to the
maximum position in not more than 1
second, except that the Administrator
may allow additional time increments
for different regimes of control operation requiring control scheduling; and
(b) From the fixed minimum flight
idle power lever position when provided, or if not provided, from not more
than 15 percent of the rated takeoff
power or thrust available to 95 percent
rated takeoff power or thrust in not
over 5 seconds. The 5-second power or

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