Commonwealth legislation

AD/B747/203 - Lavatory Drain System Leak Tests

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

This Airworthiness Directive requires operators of Boeing 747-100/200/300/SP/400F aeroplanes to perform the lavatory drain-system inspections and maintenance set out in US FAA AD 99-08-10 (Amdt 39-11116). It copies the FAA compliance schedule (initial and repetitive actions) and becomes effective 17 June 1999. Operators pay for and carry out the inspections and repairs; the directive's purpose is to reduce leaks that can form and shed so-called “blue ice.”

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/B747/203 - Lavatory Drain System Leak Tests.

AD/B747/203 - Lavatory Drain System Leak Tests

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source
Boeing 747 Series Aeroplanes

AD/B747/203 Lavatory Drain System Leak Tests 6/99

Applicability: Model 747-100, -200, -300, -SP and -400F series aeroplanes certificated in any category.

Requirement: Inspection and maintenance requirements of US FAA AD 99-08-10 are to be performed.

Note: FAA AD 99-08-10 amendment 39-11116 refers.

Compliance: Initial action and subsequent repetitive actions as defined in US FAA AD 99-08-10 Amdt 39-11116, with a revised effective date of 17 June 1999.

This Airworthiness Directive becomes effective on 17 June 1999.

Background: Certain design features of the 747 toilet flush system have lead to an increase in the incidences of “blue ice” forming on the airframe and detaching in flight causing damage to the airframe and property on the ground. This directive introduces inspections and maintenance actions to improve the reliability of the system and reduce the possibility of leaks and, ultimately, the likelihood of “blue ice” forming and detaching in flight.

Source text

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

1 AD/B747/203 - Lavatory Drain System Leak Tests