Commonwealth legislation

AD/DC3/12 Reissue - Oil Dilution Unit - Modification

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

This Directive requires removal of specific oil-dilution pipes and valves, replacement of four fittings with Dural plugs, and rendering the oil-dilution switches inoperative on all Douglas DC‑3 series aeroplanes. Aircraft owners and maintenance organisations must carry out these mechanical changes within 100 hours' time in service after 29 February 1984 at their expense; the stated aim is to reduce fire risk because the dilution unit is not used locally (Requirement; Compliance; Background).

JSON API

Deep dive

Want the full deep dive?

Zoe can write the in-depth analysis on top of the summary above: how it works, who it affects and what each part actually does.

Current sections

Direct links to the current provisions in AD/DC3/12 Reissue - Oil Dilution Unit - Modification.

AD/DC3/12 Reissue - Oil Dilution Unit - Modification

meta-content-style-type: text/css meta-content-type: application/xhtml+xml; charset=utf-8 meta-generator: Aspose.Words for .NET 22.10.0

?xml version="1.0" encoding="utf-8" standalone="no"?>

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source Douglas DC3 Series Aeroplanes

AD/DC3/12

Reissue

Applicability: All models.

Oil Dilution Unit - Modification 1/84

Requirement: 1. Remove the 1/4-in OD pipe between the restrictor at the base of the Pioneer pressure warning switch and the oil dilution solenoid. Also remove the 1/4-in OD pipe between the oil dilution solenoid and the “T” drain on the engine oil system.

2. Replace the four hexagon nipples found on the restrictor, oil dilution valve and “T” drain with 1/8-in (gas) Dural plugs.

3. Render the oil dilution switches on the inboard side of the port electrical panel inoperative.

Compliance: Unless already accomplished within 100 hours time in service after 29 February 1984.

Background: This Directive is reissued with no changes made to the requirement. In order to reduce the possibility of fire, and in view of the fact that the dilution unit is not used in this country, the oil dilution system is rendered inoperative.

Source text

Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.