Commonwealth legislation

AD/Z-242L/1 - Oil Sludge Valve

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

2/10 complexity

This directive requires a one‑time inspection of the engine oil sludge valve on certain Moravan Zlin Z‑242L aeroplanes (specified serials) per the manufacturer’s Service Bulletin, with completion required before the aircraft may fly again.

Issued after a reported manufacturing error that could let the valve fail and cause oil loss, it forces owners/operators to ground affected aeroplanes, arrange and pay for inspection and any corrective work.

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AD/Z-242L/1 - Oil Sludge Valve

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Moravan Zlin Z-242L Series Aeroplanes

AD/Z-242L/1 Oil Sludge Valve 9/97 DM

Applicability: All Zlin 242L aircraft serial numbers up to 0708 and aircraft serial numbers 0727 and 0728 incorporating an oil system sludge valve as detailed in Moravan Drawing Number L 242L.7100-04.00.

Requirement: To prevent the possible leakage of oil from the engine, inspect the sludge valve for proper locking in accordance with Moravan Mandatory Service Bulletin Number Z 242L/25a.

Note: Czech Republic Airworthiness Directive CAA - AD-2 - 029/97 refers.

Compliance: Prior to further flight effective 2 July 1997.

Background: This directive has been issued to require an inspection of the oil system sludge valve for proper locking. The requirement is in response to advice from the manufacturer of a manufacturing error which may cause failure of the valve and the loss of oil from the engine.

Source text

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

1 AD/Z-242L/1 - Oil Sludge Valve