Commonwealth legislation

AD/TSA-600/34 - Hydraulic System Internal Leak Check

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This Act has been repealed and is no longer in force. It is retained for historical reference.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

Owners/operators of Aerostar (Piper/Ted Smith) 600 and 700 series aircraft without an auxiliary hydraulic pump must perform a safety check to ensure the landing gear won’t unexpectedly fall down in flight. The check involves jacking the airplane, retracting the gear with hydraulics off and flaps neutral, and confirming it stays retracted for 30 minutes.

Do the test before the next Maintenance Release after 31 Dec 1985 and each time a new Maintenance Release is issued. This prevents gear extension from a hydraulic leak that could create drag during single‑engine flight.

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/TSA-600/34 - Hydraulic System Internal Leak Check.

AD/TSA-600/34 - Hydraulic System Internal Leak Check

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source
Aerostar (Piper/Ted Smith) 600 and 700 Series Aeroplanes

AD/TSA-600/34 Hydraulic System Internal Leak Check 11/85

Applicability: All models not fitted with an auxiliary hydraulic pump system.

Requirement: With the aircraft on jacks, ensure that with the undercarriage fully retracted, the flap selector lever in neutral and the hydraulic pressure selected off, the landing gear remains in the fully retracted position for a minimum period of 30 minutes.

Compliance: Prior to the issue of the next Maintenance Release after 31 December 1985 and thereafter at each issue of a new Maintenance Release.

Background: In the event of a R/H engine failure in flight, the landing gear may automatically extend to the locked down position if an internal leak was present in the hydraulic system.

Source text

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

1 AD/TSA-600/34 - Hydraulic System Internal Leak Check