Document ID: chunk:federal_register_of_legislation:F2006L01312:body:0:p2
Version: federal_register_of_legislation:F2006L01312
Segment Type: other
Provision Reference: 
Character Range: 2783–12168

Background:              This Directive was originally issued to address several hub, blade, and shank failures reported overseas on Mitsubishi MU-2 aircraft.  In one incident, an aircraft was involved in a fatal accident.  Due to the similarity of construction and load transfer paths between the 3, 4 and 5 bladed propeller models and propellers installed on the MU-2 aircraft, the FAA has mandated replacement of certain Hartzell turbine propeller hubs over a 10 year time period.

                                        Amendment 1 altered Table 1 and removed reference to AD/PHZL/43 Amdt 6.  Table 1 was updated to reflect removal of certain serial number hubs from the Table of applicability.  References previously made to AD/PHZL/43 Amdt 6 are now directed to the Hartzell Blade Manual 133C.

                                        Amendment 2 clarified Requirement 2 of the Directive and reflected the requirements of the referenced FAA Directive.

                                        Amendment 3 clarified the requirements relating to identification of the hub serial number and the existence in some cases of a suffix to the 2 letter prefix.

                                        This amendment is issued to correct the omission of a section of Table 1.

                                        The original issue of this Airworthiness Directive became effective on 2 January 1997.

                                        Amendment 1 of this AD became effective on 11 July 2002.

                                        Amendment 2 of this AD became effective on 20 January 2005.

                                        Amendment 3 of this AD became effective on 13 April 2006.

                                        TABLE 1.
               Replacement due by end:  MAR 97                                                                                                                                                                                                                                                                                                                                                                                                                                                                      SEP 97   MAR 98    SEP 98     MAR 99     SEP 99
Hub Model No.  Serial No. Series
HC-B3TN-3      BU                       1-377                                                                                                                                                                                                                                                                                                                                                                                                                                                                       378-754  755-1881  1882-3008  3009-3840  3841-4673
HC-B3MN-3      GB
HC-B3MN-5      FZ
HC-B3TN-5      BV                       1-86                                                                                                                                                                                                                                                                                                                                                                                                                                                                        87-172   173-529   530-885    886-1622   1623-2359
HC-B3TN-4      FK
HC-B3TN-2      AG                       1-59                                                                                                                                                                                                                                                                                                                                                                                                                                                                        60-118   119-174   175-231    232-238
HC-B3TF-7      EX                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 1-3        4-7
HC-A3VF-7      DS                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      1          2-20       21-39
HC-B4TN-5      CD                       1-94                                                                                                                                                                                                                                                                                                                                                                                                                                                                        95-187   188-663   664-1139   1140-1399  1400-1660
HC-B4TN-3      EA                       1-169                                                                                                                                                                                                                                                                                                                                                                                                                                                                       170-338  339-437   438-537    538-758    759-979
HC-B4MN-5      FL                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            1-35      36-70      71-238     239-406
HC-B4MP-3      FW                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 1-15       16-31
HC-B4MP-4      FU                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 1-3        4-7

               Replacement due by end:  MAR 97  SEP 97  MAR 98   SEP 98   MAR 99   SEP 99
Hub Model No.  Serial No. Series
HC-B5MP-5      EZ                               1
HC-B5MA-3      HB
HC-B5MN-3      ES                               1
HC-B5MP-3      EV                       1-51    52-101  102-223  224-345  346-478  479-612
HC-B5MP-3      FT                                       1-3      4-6

               Replacement due by end:  MAR 2000   SEP 2000   MAR 2001   SEP 2001   MAR 2002    SEP 2002
Hub Model No.  Serial No. Series
HC-B3TN-3      BU                       4674-5707  5708-6742  6743-7864  7865-8987  8988-10409  10410-11832
HC-B3MN-3      GB
HC-B3MN-5      FZ
HC-B3TN-5      BV                       2360-2689  2690-3020  3021-3410  3411-3600  3601-4035   4036-4270
HC-B3TN-4      FK                                             1          2-3
HC-B3TN-2      AG                                                        239-244    245-295     296-351
HC-B3TF-7      EX                       8-47       48-87      88-112     113-136    137-138     139-140
HC-A3VF-7      DS                       40-109     110-179    180-230    231-280    281-313     314-345

HC-B4TN-5      CD                       1661-1848  1849-2036  2037-2133  2134-2230  2231-3134   3135-3342
HC-B4TN-3      EA                       980-1003   1004-1028  1029-1036  1037-1043  1044-1092   1093-1142
HC-B4MN-5      FL                       407-411    412-416    417-423    424-429    430-436     437-1002
HC-B4MP-3      FW