Document ID: chunk:federal_register_of_legislation:F2008L02819:body:0:p2
Version: federal_register_of_legislation:F2008L02819
Segment Type: other
Provision Reference: 
Character Range: 3434–5563

auxiliary tank interface.

   3. Disconnect all pneumatic connections if applicable, cap them at the pneumatic source, and secure them.

   4. Disconnect all fuel feed and fuel vent plumbing interfaces with aeroplane original equipment manufacturer (OEM) tanks, cap them at the aeroplane tank side, and secure them in accordance with a approved method; one approved method is specified in United Stated Federal Aviation Administration advisory Circular AC 25-8 Fuel Tank Systems Installations.  In order to eliminate the possibility of structural deformation during cabin decompression, leave open and secure the disconnected auxiliary fuel tank vent lines.

   5. Pull and collar all circuit breakers used to operate the auxiliary tank.

   6. Revise the weight and balance document, if required, and obtain CASA approval.

   7. Amend the applicable sections of the applicable aircraft flight manual (AFM) to indicate that the auxiliary fuel tank is deactivated.  Remove auxiliary fuel tank operating procedures to ensure that only the OEM fuel system operational procedures are contained in the AFM.  Amend the Limitations Section of the AFM to indicate that the AFM Supplement for the Supplemental Type Certificate is not in effect.  Place a placard in the flight deck indicating that the auxiliary tank is deactivated.  The AFM revisions specified in this paragraph may be accomplished by inserting a copy of this Directive into the AFM.

   8. Amend the applicable sections of the applicable aeroplane maintenance manual to remove auxiliary tank maintenance procedures.

   9. After the auxiliary fuel tank is deactivated, accomplish procedures such as leak checks and pressure checks deemed necessary before returning the aeroplane to service.  These procedures must include verification that the aeroplane fuel quantity indication system and fuel distribution systems have not been adversely affected.

   10. Include with the operator's proposed procedures any relevant information or additional steps that are deemed necessary by the operator to comply with the deactivation and return the aeroplane to service.