Commonwealth legislation

AD/DH114/47 - Fuel System - Modification and Component Relocation

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

4/10 complexity

Requires specific fuel‑system hardware to be moved: the low‑level shut‑off valve is to be relocated from inboard to outboard tanks and the submerged boost pump moved from outboard to inboard tanks, with associated base‑plate work (modify or manufacture) and electrical changes. It applies to DH114 (Heron) aeroplanes modified to Connair Drawing 73B006; operators/owners must carry out the work, placard controls, and update flight and maintenance manuals (maintenance changes require Secretary approval). The action responds to a safety review identifying shortcomings.

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/DH114/47 - Fuel System - Modification and Component Relocation.

AD/DH114/47 - Fuel System - Modification and Component Relocation

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 DH114 (Heron) Series Aeroplanes

AD/DH114/47 Fuel System - Modification and Component Relocation

Applicability: All models which have been modified to Connair Pty. Drawing 73B006 and associated engineering drawings and orders.

7/85

Requirement: 1. Remove low level shut-off valve from inboard fuel tanks and install in outboard fuel tanks.

2. Remove submerged boost pump from outboard tanks and install in the inboard tanks.

Note: To accomplish items 1 and 2 above, it would be preferable to install the pre mod 73B006 outboard tank base plates and associated gaskets. However, should these not be available, existing base plates may be modified to suit, or new base plates manufactured from 2024-T3 0.125 inch aluminium alloy.

The inboard tank base plate low level cut-off valve aperture will require a blanking plate to be fitted using 2024-T3 0.125 inch aluminium alloy.

3. Modify the electrical system as required to accomplish component re-location.

4. Placard fuel boost pump selector switches as required.

5. Incorporate a flight manual amendment to include variation in fuel management procedures.

6. Amend maintenance manuals and maintenance schedules in a manner approved by the Secretary.

Compliance: Before further flight after 30 September 1985.

Background: A review of the modified fuel system has revealed shortcomings which necessitate remedial action.

Source text

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