Commonwealth legislation

AD/SF340/11 - Pitot Systems Water Traps

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Commonwealth

Collection

legislative instrument

Plain English Summary

2/10 complexity

This AD mandates that owners/operators of SAAB SF340A aircraft serial numbers 004–138 carry out the modification/inspection required by SAAB Service Bulletin SF340‑34‑056 (or later revision) by 31 December 1988. It was issued to address water ingress and pitot freezing that can cause erroneous air data.

The AD is compulsory, fixes a firm deadline, delegates technical detail to the manufacturer’s bulletin (allowing later revisions), and does not specify costs, scheduling or enforcement mechanisms.

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AD/SF340/11 - Pitot Systems Water Traps

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source SAAB SF340 Series Aeroplanes

AD/SF340/11 Pitot Systems Water Traps 11/88

Applicability: Model SF340A with serial numbers 004 through 138.

Requirement: Action in accordance with SAAB Scania AB Service Bulletin SF340-34-056 dated 1 August 1988 or later revision.

Note: Swedish Airworthiness Directive No. 1-027 refers.

Compliance: Prior to 31 December 1988.

Background: Water intrusion into the pitot systems may occur in heavy rain. This can result in ice blocking the systems leading to erroneous air data signals.

Source text

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