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AD/ERJ-190/12 Amdt 1 - Hydraulic Shutoff Valves
Embraer ERJ-190 Series AeroplanesEmbraer ERJ-190 Series Aeroplanes
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Embraer ERJ-190 Series Aeroplanes
| AD/ERJ-190/12 Amdt 1 | Hydraulic Shutoff Valves | 18/2014 |
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| Applicability: | Embraer ERJ-190( ) aircraft equipped with firewall hydraulic shutoff valves part numbers (P/N) 975287-3 or 975287-5. |
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| Requirement: | Perform an operational check for proper operation of the firewall hydraulic shutoff valves P/Ns 975287-3 or 975287-5, in accordance with Embraer Service Bulletin (SB) No. 190-29-0008 original issue, or further revisions approved by the ANAC.If necessary, replace any faulty hydraulic shutoff valve with either;(a) a valve bearing P/Ns 975287-3 or 975287-5 that has passed the operational check ;or,(b) a valve bearing a new P/N that has been approved as a replacement valve.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.”The instructions and procedures to accomplish this AD are detailed in Embraer SB No. 190-29-0008 original issue, or further revisions approved by the ANAC.Note: AGÊNCIA NACIONAL DE AVIAÇÃO CIVIL - BRAZIL AD 2007-02-02R2 dated 17 July 2009 refers. |
| Compliance: | Initial inspection within 600 flight hours from 27 August 2007, unless previously accomplished, thereafter at intervals not to exceed 600 flight hours. |
| The effective date of this AD is 25 August 2014. | |
| Background: | Amendment 1 of this AD has been issued to fully reflect the details and requirements of revision 2 of the Brazilian AD which was issued to remove the requirement to install the same P/N valve where replacement is found necessary. Installation of a new P/N valve is now possible.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. |
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Pieter van Dijk
Delegate of the Civil Aviation Safety Authority