Document ID: chunk:federal_register_of_legislation:F2008L00532:body:0:p2
Version: federal_register_of_legislation:F2008L00532
Segment Type: other
Provision Reference: 
Character Range: 2813–4288

identified in the "Existing Part Number" column of the table specified in paragraph 2.C. of Boeing Service Bulletin 747-21A2439, Revision 2, on any aeroplane.

                Note:  FAA AD 2007-25-19 Amdt 39-15301 dated 30 November 2007 refers.

Compliance:     1. At the applicable times specified in the Table 1 of paragraph 1.E. of Boeing Service Bulletin 747-21A2439, Revision 2, except where Boeing Service Bulletin 747-21A2439, Revision 2, specifies a compliance time "after the release date of the service bulletin" or "after the date of Revision 02 of the service bulletin," this AD requires compliance within the specified compliance time after the effective date of this AD.

                The applicable corrective actions must be done before further flight.

                2. From the effective date of this AD.
             This Airworthiness Directive becomes effective on 13 March 2008.
Background:  The FAA has received a report of an uncommanded up and down pitch movement of an aeroplane in flight and resistance in the elevator controls on the ground during taxi.  The issuing of this AD is intended to prevent cracking and buckling of the forward or rear heat exchanger shell of the air distribution system of the crew rest area, which could result in jamming of the rudder and/or elevator control cables and consequent reduced controllability of the aeroplane.

Charles Lenarcic
Delegate of the Civil Aviation Safety Authority

21 January 2008