Which specific CS 29.1013 sub-paragraphs apply to pressure lubrication systems for transmissions and gearboxes?

Only sub-paragraphs (c), (d), and (f) of CS 29.1013 apply to pressure lubrication systems for transmissions and gearboxes.

What are the three design requirements for the oil strainer or filter in a pressure lubrication system for transmissions and gearboxes?

The oil strainer or filter must: (1) be designed to remove any contaminant that may damage transmission and drive system components or impede lubricant flow to a hazardous degree; (2) be equipped with a bypass that allows normal lubricant flow with the strainer or filter completely blocked and minimises release of collected contaminants by appropriate location; and (3) be equipped with a means to indicate collection of contaminants at or before opening of the bypass.

Which CS 29 references must splash type lubrication systems for rotor drive system gearboxes comply with?

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

CS 29.1027 Transmissions and gearboxes: General

Q: When must the means to indicate collection of contaminants on the filter or strainer activate?

The means to indicate collection of contaminants must activate at or before opening of the bypass.

Q: What must the oil system for rotor drive system components that require continuous lubrication be independent of, and what two operating conditions must it ensure?

The oil system must be sufficiently independent of the lubrication systems of the engine(s) to ensure (1) operation with any engine inoperative, and (2) safe autorotation.

Q: List all the CS 29 references that pressure lubrication systems for transmissions and gearboxes must comply with, in addition to the CS 29.1013 sub-paragraphs.

In addition to CS 29.1013 (c), (d), and (f), pressure lubrication systems must comply with CS 29.1015, 29.1017, 29.1021, 29.1023, and 29.1337(d).

Q: What is the purpose of the bypass on the oil strainer or filter, and what two specific conditions must it meet?

The bypass must be 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 minimised by appropriate location of the bypass to ensure that collected contaminants are not in the bypass flow path.

Q: What is required for each lubricant tank or sump outlet that supplies lubrication to rotor drive systems, and do the filter requirements of sub-paragraph (b)(1) apply to these screens?

Each lubricant tank or sump outlet supplying lubrication to rotor drive systems and rotor drive system components must have 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 sub-paragraph (b)(1). The requirements of sub-paragraph (b)(1) do not apply to screens installed at lubricant tank or sump outlets.

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CS 29.1027 Transmissions and gearboxes: General

ED Decision 2003/16/RM

(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 CS 29.1013, sub-paragraphs (c), (d) and (f) only, CS 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 minimised by appropriate location of the bypass to ensure that collected contaminants are not in the bypass flow path;

(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 sub-paragraph (b)(1). The requirements of sub-paragraph (b)(1) do not apply to screens installed at lubricant tank or sump outlets.

Details

Source-Title: CS 29.1027 Transmissions and gearboxes: General View latest amendments

Erulesid: ERULES-1963177438-5471 Compare versions

Domain: Initial airworthiness

Amendedby: Initial issue

Applicabilitydate: 14 November, 2003

Entryintoforcedate: 14 November, 2003

Regulatorysource: ED Decision 2003/16/RM Navigate

Regulatorysubject: CS-29

Typeofcontent: CS (Certification specification)

Origin: EASA

Category: EAR