Document ID: chunk:federal_register_of_legislation:F2006B08792:body:0:p3
Version: federal_register_of_legislation:F2006B08792
Segment Type: other
Provision Reference: 
Character Range: 5835–7511

the cooler parts of the engine nacelle. Arrange cable runs so that they are not exposed to mechanical damage during normal engine operation or during maintenance. Cables and cable conduits shall not be directly clipped to the engine diaphragm.

                 Sealing of Firewall Diaphragm:

                 Rework the firewall and diaphragm to ensure that they will provide a complete seal against the passage of flame and hot gas from one nacelle compartment to another. In particular, the following modifications are required:-

                   (a)     Seal all gaps and holes in firewall and diaphragm with fire-proof material.

(b)     Replace with fire-proof components, all existing light alloy fittings, connections, disconnect plates, etc., on firewall and diaphragm. Alternatively, shroud existing light alloy parts with adequate fire-proof shields so that, in event of an engine nacelle fire, they will not be subjected to flame or their failure will not allow flame to penetrate the firewall.

(c)     Replace a sufficient number of the existing light alloy rivets on the firewall with steel rivets or bolts to ensure that, in the event of an accessory compartment fire hot enough to melt light alloy, the firewall will remain intact and impervious to flame.

    Compliance: Unless already accomplished, within 100 hours time in service after 31 March 1984.

               Background:  This Directive is raised in issue to remove the prohibition imposed on the use of free hose and clamps assemblies in Amdt. 1 of this directive. The prohibition is unnecessary for these large diameter low pressure applications considering their long satisfactory history.