spaschal on DSK3GDR082PROD with CFR

Federal Aviation Administration, DOT

Section 29.1043

the  - on -  and  - off -  positions and must
be supported so that no loads resulting
from its operation or from accelerated
flight conditions are transmitted to
the lines attached to the valve.

(c) Splash type lubrication systems
for rotor drive system gearboxes must
comply with SectionSection 29.1021 and 29.1337(d).

Section 29.1027 Transmission and gearboxes:
general.

COOLING

(a) The oil system for components of
the rotor drive system that require
continuous lubrication must be sufficiently independent of the lubrication
systems of the engine(s) to ensure - 
(1) Operation with any engine inoperative; and
(2) Safe autorotation.
(b) Pressure lubrication systems for
transmissions and gearboxes must
comply with the requirements of
SectionSection 29.1013, paragraphs (c), (d), and (f)
only, 29.1015, 29.1017, 29.1021, 29.1023, and
29.1337(d). In addition, the system must
have - 
(1) An oil strainer or filter through
which all the lubricant flows, and
must - 
(i) Be designed to remove from the
lubricant any contaminant which may
damage transmission and drive system
components or impede the flow of lubricant to a hazardous degree; and
(ii) Be equipped with a bypass constructed and installed so that - 
(A) The lubricant will flow at the
normal rate through the rest of the
system with the strainer or filter completely blocked; and
(B) The release of collected contaminants is minimized by appropriate location of the bypass to ensure that collected contaminants are not in the bypass flowpath;
(iii) Be equipped with a means to indicate collection of contaminants on
the filter or strainer at or before opening of the bypass;
(2) For each lubricant tank or sump
outlet supplying lubrication to rotor
drive systems and rotor drive system
components, a screen to prevent entrance into the lubrication system of
any object that might obstruct the
flow of lubricant from the outlet to the
filter required by paragraph (b)(1) of
this section. The requirements of paragraph (b)(1) of this section do not apply
to screens installed at lubricant tank
or sump outlets.

[Amdt. 29-26, 53 FR 34218, Sept. 2, 1988]

Section 29.1041

General.

(a) The powerplant and auxiliary
power unit cooling provisions must be
able to maintain the temperatures of
powerplant components, engine fluids,
and auxiliary power unit components
and fluids within the temperature limits established for these components
and fluids, under ground, water, and
flight operating conditions for which
certification is requested, and after
normal engine or auxiliary power unit
shutdown, or both.
(b) There must be cooling provisions
to maintain the fluid temperatures in
any power transmission within safe
values under any critical surface
(ground or water) and flight operating
conditions.
(c) Except for ground-use-only auxiliary power units, compliance with
paragraphs (a) and (b) of this section
must be shown by flight tests in which
the temperatures of selected powerplant component and auxiliary power
unit component, engine, and transmission fluids are obtained under the
conditions prescribed in those paragraphs.
[Doc. No. 5084, 29 FR 16150, Dec. 3, 1964, as
amended by Amdt. 29-26, 53 FR 34218, Sept. 2,
1988]

Section 29.1043

Cooling tests.

(a) General. For the tests prescribed
in Section 29.1041(c), the following apply:
(1) If the tests are conducted under
conditions deviating from the maximum ambient atmospheric temperature specified in paragraph (b) of this
section, the recorded powerplant temperatures must be corrected under
paragraphs (c) and (d) of this section,
unless a more rational correction
method is applicable.
(2) No corrected temperature determined under paragraph (a)(1) of this
section may exceed established limits.
(3) The fuel used during the cooling
tests must be of the minimum grade

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