CTHIn ForceLegislation
AD/ERJ-170/10 Amdt 2 - Firewall Hydraulic Shutoff Valves
//
© 2026 Zoe. All rights reserved.
Zoe is a legal information platform. Always consult the Federal Register of Legislation for authoritative text.
AD/ERJ-170/10 Amdt 2 - Firewall Hydraulic Shutoff Valves
Start here
Turn the raw legal text into a practical explanation grounded in AD/ERJ-170/10 Amdt 2 - Firewall Hydraulic Shutoff Valves.
| AD/ERJ-170/10 Amdt 2 | Firewall Hydraulic Shutoff Valves | 10/2009 |
|---|
| Applicability: | Embraer ERJ-170( ) aircraft fitted with firewall hydraulic shutoff valves (FWSOV) part number (P/N) 975287-3 or P/N 975287-5. |
|---|---|
| Requirement: | Perform an operational check in accordance with Embraer Service Bulletin No.170-29-0013 original issue 12 December 2006, or further ANAC approved revisions, for proper operation of the firewall hydraulic shutoff valves P/N975287-3 or P/N 975287-5. If necessary, replace the faulty hydraulic shutoff valve with a serviceable FWSOV.For the purpose of this AD, an operational check is: “A task to determine that an item is fulfilling its intended purpose. The check does not require quantitative tolerances. This is a failure finding task.”For the purpose of this AD, a suitable FWSOV is a firewall hydraulic shutoff valve P/N 975287-3 or 975287-5 that has passed the operational check described in Embraer SB No. 170-29-0013 or either the replacement of these valves by others bearing a new P/N.Note: Agência Nacional De Aviação Civil - Brazil Airworthiness Directive ADNo. 2007-02-01R2 dated 17 July 2009 refers. |
| Compliance: | Remains unchanged as detailed in the original issue of this AD as: Within the next 600 flight hours after 7 June 2007, and thereafter at intervals that do not exceed 600 flight hours. |
| This Amendment becomes effective on 24 September 2009. | |
| Background: | Periodic operational check of the firewall hydraulic shutoff valves, made during routine maintenance, has revealed that the failure rate of that component is significantly higher than expected. Such a dormant failure, when combined with further possible failures, such as engine fire, may lead to an unacceptable reduction of safety margins.Amendment 1 added an additional part number valve to the applicability section with no change to the requirement section. |
| This amendment removes the requirement to replace the FWSOV with one bearing the same P/N.The original issue of this AD became effective 7 June 2007.Amendment 1 of this AD became effective on 25 October 2007. |
|---|
Image unavailable in extracted text
James Coyne
Delegate of the Civil Aviation Safety Authority
14 August 2009