Document ID: chunk:federal_register_of_legislation:F2008L00533:body:0:p2
Version: federal_register_of_legislation:F2008L00533
Segment Type: other
Provision Reference: 
Character Range: 2841–7530

repair done in accordance with any version of ASB
                     737-28A1120 listed in Table 1, whichever occurs later and thereafter, at intervals not to exceed 15,000 hours TIS.
                     b. Model 737-100, -200, -300, -400 and -500 series aeroplanes having line numbers 3073 and subsequent -
                        (i) For aeroplanes on which the inspection or repair specified in any version of ASB 737-28A1120 listed in Table 1, has been done as of the effective date of this Amendment - Within 120 days after the effective date of this Amendment or 5,000 hours TIS after the last inspection done in accordance any of the revisions of ASB 737-28A1120 listed in Table 1, whichever occurs later and thereafter, at intervals not to exceed 15,000 hours TIS.
                        (ii) For aeroplanes on which the inspection or repair specified in any version of ASB 737-28A1120 listed in Table 1, has not been done as of the effective date of this Amendment - Before the accumulation of 5,000 total hours TIS, or within 120 days after the effective date of this Amendment, whichever occurs later and thereafter, at intervals not to exceed 15,000 hours TIS.
                     c. Model 737-200C series aeroplanes - Within 120 days after the effective date of the original issue of this Directive, or within 5,000 hours TIS since the last inspection or repair done in accordance with any version of Boeing ASB 737-28-1120, whichever occurs later and thereafter at intervals not to exceed 15,000 hours TIS.
                Table 1
                ASB 737-28A1120 Version                                                                                                                                                                                                                                                                                                                                                                                                                                           Date    As revised by Notice of Status Change (NSC) as applicable

Number          Date
Original Issue  24 April 1998                                                                                                                                                                                                                                                                                                                                                                                                                                                     NSC 01  7 May 1998
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  NSC 02  8 May 1998
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  NSC 03  9 May 1998
Revision 1      28 May 1998
Revision 2      26 November 1998
Revision 3      26 April 2001

             For Requirement 2 - Before further flight following the Requirement 1 inspection.
             For Requirement 3 - Within 30 days after the Requirement 1 inspection.
             This Amendment becomes effective on 13 March 2008.
Background:  The original issue of this Directive superseded AD/B737/119 Amdt 3, AD/B737/121 Amdt 2 and AD/B737/138 Amdt 1 which have been cancelled.
             The FAA has advised of a report of a fuel tank explosion on a Model 727-200F aeroplane on the ground together with a report of chafed wires and a damaged power cable sleeve of a fuel boost pump discovered during an inspection on a Model
             737-300 aeroplane.  (The fuel boost pump installation on certain Model 737 aeroplanes is almost identical to the installation on Model 727 aeroplanes.)
             The original issue of this Directive was issued to detect and correct chafing of the fuel boost pump electrical wiring, prevent leakage of fuel into the conduit and to prevent electrical arcing between the wiring and