Document ID: chunk:federal_register_of_legislation:F2006B06222:body:0:p2
Version: federal_register_of_legislation:F2006B06222
Segment Type: other
Provision Reference: 
Character Range: 2747–5742

internal pilot tube bores has been fitted, reinspect in accordance with the Requirement Document at intervals not exceeding 3000 hours time in service.
 COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY
 SCHEDULE OF AIRWORTHINESS DIRECTIVES

               1. c. Regardless of time since new, any propeller that has experienced a propeller blade strike* prior to 24 February 1995, must have the hub inspected IAW the Requirement Document within 10 hours TIS from 24 February 1995 or by 30 April 1995, whichever occurs first.

               Thereafter, reinspect hub at intervals not exceeding 600 hours TIS or 5 years TIS, whichever occurs first, until hub unit P/N 840-139 with pilot tubes P/N A1891A has been fitted. Once a hub with compressively rolled internal pilot tube bores has been fitted, reinspect in accordance with the Requirement Document at intervals not exceeding 3000 hours TIS.

 1.  d. Regardless of time since new, any propeller hub assemblies that experience a blade strike* after 24 February 1995 must have the hub inspected in accordance with the Requirement Document prior to further flight.

               Thereafter, reinspect hub at intervals not exceeding 600 hours TIS or 5 years TIS, until hub unit P/N 840-139 with pilot tubes P/N A1891A has been fitted. Once a hub with compressively rolled internal pilot tube bores has been fitted, reinspect in accordance with the Requirement Document at intervals not exceeding 3000 hours TIS.

2.             For blades with 2900 or more hours TIS inspect within 100 hours TIS from 24 February 1995.

               Thereafter, reinspect in accordance with the Requirement Document at each propeller overhaul or at intervals not exceeding 3000 hours TIS, whichever occurs first.

               2. a. For blades with less than 2900 hours TIS but more than 2200 hours TIS by 24 February 1995 inspect prior to blades reaching 3000 hours TIS.

               Thereafter, reinspect in accordance with the Requirement Document at each propeller overhaul or at intervals not exceeding 3000 hours TIS, whichever occurs first.

               2. b. For blades with 2200 hours or less TIS inspect within 800 hours time in service from 24 February 1995.

               Thereafter, reinspect in accordance with the Requirement Document at each propeller overhaul or at intervals not exceeding 3000 hours TIS, whichever occurs first.

           Note: *A blade strike is defined as a propeller having blade/s that have been bent beyond the repair limits specified in Hartzell Blade Repair and Overhaul Manual No 133B.

           Background:  There has been two propeller hub arm separations and one crack indication involving propellers from MU-2B-60 aircraft. Hartzell issued ASB A182 specifically for the MU-2B-60 aircraft. Due to the similarity of the MU-2 propeller assembly, Hartzell has extended the inspection to include the propellers fitted to the MU-2B-26A, -36A and