Commonwealth legislation

AD/BAL/9 Amdt 1 - Instruments in Thermal Airships

RepealedCTH

This Act has been repealed and is no longer in force. It is retained for historical reference.

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

2/10 complexity

This is a safety directive for thermal airships (steerable hot air aircraft, sometimes called "hot air blimps"). Think of them as hot air balloons with an engine and rudder for steering.

What you must do:

Calibrate all flight instruments (altimeters, temperature gauges, pressure sensors, etc.) so they read accurately
Follow the manufacturer's specific instructions for these checks

Who this applies to:

All thermal airships that don't have a special approved maintenance system already registered with aviation authorities

How often:

At least once every three years

Why this exists: Normally, major inspections would catch instrument drift, but these airships are maintained under a specific regulation (CAO 100.54) that doesn't require those major overhauls. This rule plugs that gap so instruments don't go unchecked for years, keeping flight data accurate and passengers safe.

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Current sections

Direct links to the current provisions in AD/BAL/9 Amdt 1 - Instruments in Thermal Airships.

AD/BAL/9 Amdt 1 - Instruments in Thermal Airships

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source Hot Air Balloons

AD/BAL/9

Amdt 1

Instruments in Thermal Airships 9/90

Applicability: All thermal airships for which a system of maintenance has not been approved pursuant to CAR 38(3).

Requirement: Carry out a calibration check of all instruments in accordance with manufacturer’s instructions/specifications.

Compliance: At intervals not exceeding three years.

Background: Whilst CAR 2 definition of aircraft covers airships the decision to have thermal airships maintained IAW CAO 100.54 means in the absence of a major inspection a period must be specified for the calibration of instruments.

This inspection requirement has been extended to all thermal airships.

Source text

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