Document ID: chunk:federal_register_of_legislation:F2006B06220:body:0:p2
Version: federal_register_of_legislation:F2006B06220
Segment Type: other
Provision Reference: 
Character Range: 3158–5994

penetrant inspection IAW the procedures specified in Hartzell SB 165E.

             3.    For propellers installed on agricultural aircraft or Piper PA-31-325 Navajo C/R, Piper PA-31-350 Navajo "Chieftain", Piper T-1020 (same as PA-31-350), PA-60- 700P or Aerostar 700P aircraft, replace pre 1983 style hubs with post 1983 hubs. If during overhaul, post 1983 style hubs are not available and the hub passes overhaul requirements then, the pre 1983 hub chamfer modification in accordance with Procedure 2 of Hartzell SB 165E may be incorporated. Hubs so modified are exempt from Requirements 1 and 2 of this Directive.

4.    For all other aircraft types listed in this directive, replace pre 1983 style hubs with post 1983 hubs. If during overhaul post 1983 style hubs are not available, and the hub meets overhaul requirements then, the pre 1983 hub chamfer modification in accordance with Procedure 2 of Hartzell SB 165E may be incorporated in a serviceable pre 1983 hub. Modified hubs are exempt from Requirements 1 and 2 of this Directive.

               Note. FAA AD 94-17-13 which supersedes FAA AD 93-16-14 amdt 39-8704, refers.

                 Compliance: 1. Visual inspection - within 10 hours time in service after 8 December 1994, and thereafter, at intervals not exceeding 10 hours time in service until a post 1983 style hub has been fitted. Any removed hub shall be permanently retired from service.

                 Eddy Current or Dye Penetrant Inspection - within 25 hours time in service after 8 December 1994 and thereafter at intervals not exceeding 25 hours time in service until post 1983 style hub has been fitted. Any removed hub shall be permanently retired from service.

2.    Within 50 hours time in service after 8 December 1994 and thereafter at intervals not exceeding 50 hours time in service until post 1983 style hub has been fitted. Any removed hub shall be permanently retired from service.

3.    For Piper PA-31-325 Navajo C/R, Piper PA-31-350 Navajo "Chieftain", Piper T- 1020, PA-60-700P, Aerostar PA-60-700P and all agricultural aircraft, any time a hub is fully dismantled for repair or overhaul of the propeller after 8 December 1994 or by 30 June 1995, whichever occurs first. Modified hubs may be retained in service for a further 400 hours or 36 calendar months, whichever occurs first. Any removed hub shall be permanently retired from service.

4.    For all other aircraft types, at the next propeller overhaul after 8 December 1994. Modified hubs may be retained in service provided an internal inspection of the hub in accordance with Hartzell SB 165 E is carried out at intervals not exceeding 400 hours or 36 calendar months, whichever occurs first. Any removed hub shall be permanently retired from service.

           Background:  There have been incidents of hub cracks in