Commonwealth legislation

AD/F100/30 - Flight Warning Computer Replacement

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This Act has been repealed and is no longer in force. It is retained for historical reference.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

3/10 complexity

This directive requires all operators of Fokker 70 and 100 aircraft to install a modified Flight Warning Computer and associated wiring changes by the compliance date. It fixes a slow phase-detection delay that could cause false alarms or suppress critical warnings.

The upgrade also alters when engine-reverser warnings are blocked, restoring alerts during initial climb (around 400–1,000 ft), reducing the risk of missed or inappropriate warnings during critical flight phases.

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Current sections

Direct links to the current provisions in AD/F100/30 - Flight Warning Computer Replacement.

AD/F100/30 - Flight Warning Computer Replacement

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Fokker F100 (F28 Mk 100) Series Aeroplanes

AD/F100/30 Flight Warning Computer Replacement 4/99

Applicability: All F.28 Mk.0070 and Mk.0100 aeroplanes.

Requirement: 1. Replace the Flight Warning Computer (FWC) with a modified unit, part number 80-0610-3-45, in accordance with Fokker Service Bulletin (SB) F100-31-051 dated 15 August 1998.

Modify the wiring in accordance with Fokker SB F100-31-047 Revision 1 dated 21 March 1997.

Note: Netherlands AD 1998-110 refers.

Compliance: 1. Prior to 22 October 2001.

Either concurrently with, or prior to Requirement 1.

This Airworthiness Directive becomes effective on 22 April 1999.

Background: In-service experience with Fokker 70/100 aircraft has shown that full transition to another flight phase could take up to eight seconds from the moment that all relevant input conditions are met. This may lead to alerts being generated during phases of flight where they should be suppressed. This directive introduces a new FWC that reduces the time delay between phases of flight to the lowest minimum attainable.

The new computer also changes the flight phase inhibition definition of the REVERSER ENG 1(2) alerts so that these alerts are no longer inhibited during initial climb between 400 and 1 000 ft radio altitude.

Source text

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

1 AD/F100/30 - Flight Warning Computer Replacement