Commonwealth legislation

AD/CASA/10 - Placard - Use of Reverse Thrust

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Commonwealth

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legislative instrument

Plain English Summary

2/10 complexity

This AD requires operators of CASA C‑212 aeroplanes with Garrett TPE‑331 engines and Hartzell HC‑B4(...) propellers to install a cockpit placard warning to avoid use of full reverse pitch until the propellers are modified per Hartzell SB 153 (placard by 30 Oct 1987).

It responds to pitch‑rod failures that can allow deeper reverse, risking severe asymmetric thrust or engine overtemperature, and imposes a temporary operational restriction while incentivising the SB 153 modification.

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AD/CASA/10 - Placard - Use of Reverse Thrust

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Casa 212 Series Aeroplanes

AD/CASA/10 Placard - Use of Reverse Thrust 10/87

Applicability: All model CASA C-212-( ) fitted with Garrett TPE-331 turboprop engines to which Hartzell model HC-B4(T,M)N-5( ) propellers are fitted.

Requirement: Install a temporary placard in a suitable position in the cockpit worded as follows: “Until propellers are modified to Hartzell SB 153, avoid use of full reverse pitch.”

Compliance: By 30 October 1987.

Background: During the past several months the four bladed steel hub propellers fitted to CASA C- 212-( ) series aircraft has experienced failure of the pitch change rod P/N B-3018S-2. Failure has occurred during ground operation with application of full reverse pitch.

Rod failure in this position will cause the propellers to travel deeper into reverse which could cause severe asymmetric thrust conditions or unacceptable engine overtemperature conditions.

Source text

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

1 AD/CASA/10 - Placard - Use of Reverse Thrust