Document ID: chunk:federal_register_of_legislation:F2005L00094:body:0:p2
Version: federal_register_of_legislation:F2005L00094
Segment Type: other
Provision Reference: 
Character Range: 2878–5911

part number(s) (P/N) of the passenger gaseous oxygen container assemblies either installed on the aircraft or held as spares.  For container assembly P/N(s) not listed in Airbus All Operator Telex (AOT) 35A3013 Revision 01, no further action is required by this Directive.
      3. For container assemblies with P/N(s) listed in AOT 35A3013 Revision 01, identify the manifold assembly P/N and serial number (S/N) in accordance with Dräger Aerospace Vendor Service Bulletin (VSB) XXG00-35-004 Revision 02.  If both P/N and S/N of the manifold assembly are listed in VSB XXG00-35-004 Revision 02, apply the following corrective actions:
        a. Replace the diaphragm installed in the manifold assembly in accordance with instructions given in VSB XXG00-35-004 Revision 02, and
        b. If the container is installed on an aeroplane:
           (i) Perform a leak check of the cabin emergency oxygen system in accordance with Aircraft Maintenance Manual (AMM) 35-23-00-790-801, and
           (ii) Perform a system door release test in accordance with AMM 35-23-00-710-805.
      4. Identify the PN and SN of spare manifold assemblies in accordance with VSB XXG00-35-004 Revision 02.  For each spare manifold assembly, if both P/N and S/N are listed in the VSB, replace the diaphragm installed in the manifold assembly in accordance with VSB XXG00-35-004 Revision 02.
   If either the P/N or the S/N of the manifold assemblies is not listed in VSB XXG00-35-004 Revision 02, this Directive requires no further action.
   Later versions of the following documents which are approved by the Direction Générale de l'Aviation Civile of France are acceptable for accomplishing the requirements of this Directive:
      Airbus AOT35A3013 Revision 01 dated 26 August 2004
      MMEL TR N° 01-21/01Z ISSUE 01
      MMEL TR N° 01-36/01Z ISSUE 01
   Note 2:  DGAC AD F-2004-152 R2 (EASA Approval 2004-11119) refers.

Compliance:  For Requirement 1 - Remains unchanged as "As of the effective date of the original issue of this Directive'.
             For Requirements 2 and 3 - Remains unchanged as "Before 31 October 2004".
             For Requirement 4 - Remains unchanged as "Before installation on an aircraft but no later than 31 October 2004".
             This Amendment becomes effective on 17 February 2005.
Background:  Qualification test and subsequent flow test, performed by the oxygen system supplier Dräger Aerospace, revealed that the oxygen flow of the passenger gaseous oxygen container assemblies may be degraded or blocked by sticking manifold diaphragm when used during a cabin decompression.

             During a slow depressurisation (loss of air conditioning packs or loss of the cabin pressure control system) and if the oxygen masks are triggered between flight level 150 and 250, the oxygen supply pressure will not be sufficient to free the diaphragm and oxygen will not flow to the passenger masks while deployed.
             The original issue of this Directive required:

                - limitation