Commonwealth legislation

AD/CESSNA 550/18 - Brake Shuttle Valve

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This Act has been repealed and is no longer in force. It is retained for historical reference.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

This is a safety rule for owners of specific Cessna Citation II business jets (models 550, 551, and S550 with specific serial numbers) equipped with BF Goodrich brakes.

The safety issue: The brake shuttle valves (components that direct hydraulic fluid pressure to the brakes) can leak due to deterioration of internal rubber seals (o-rings). The seals break down after exposure to an incompatible lubricant used during manufacturing.

Required actions:

Repeated inspections: Check the brake shuttle valves every 50 flight hours until the parts are replaced
Replacement: Install new brake shuttle valves within 200 flight hours, following the manufacturer's specified procedure (BF Goodrich Service Bulletin 517)

Who it affects: Only operators of specific Cessna 550 series aircraft identified by unit/serial number ranges (e.g., -0002 through -0619) that have BF Goodrich brakes installed.

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/CESSNA 550/18 - Brake Shuttle Valve.

AD/CESSNA 550/18 - Brake Shuttle Valve

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source
Cessna 550 (Citation II) Series Aeroplanes

AD/CESSNA 550/18 Brake Shuttle Valve 5/90

Applicability: Model 550 and 551 with unit number -0002 through -0619 and -0621 through -0623 equipped with BF Goodrich brakes.

Model S550 with unit number -0001 through -0160 incorporating SB S550-32-7, BF Goodrich brakes and wheels installation.

Requirement: 1. For model 550 and 551:

Inspect in accordance with Cessna alert Service Letter SLA 550-32-38.

For model S550:

Inspect in accordance with Cessna Alert Service Letter SLA S550-32-15.

Replace brake shuttle valves in accordance with BF Goodrich Service Bulletin SB 517.

Compliance: 1. Within 50 hours time in service after 17 May 1990 and thereafter at intervals not to exceed 50 hours time in service, until BF Goodrich SB 517 is incorporated.

Within 200 hours time in service after 17 May 1990.

Background: Reports of leaking shuttle valves have been received by the manufacturer. Leakage has been attributed to slow deterioration of shuttle valve o-ring material as a result of exposure to an incompatible seal lubricant.

Source text

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

1 AD/CESSNA 550/18 - Brake Shuttle Valve