Aircraft with Textron Lycoming (L)TIO-540 and Turbocharged IO-540 series engines

Cessna 310 and 320 modified by Riley STC SA2082WE Gulfstream 700 (formerly Rockwell 700, Fuji FA-300-12) Helio H-700

Piper PA-23-250, PA-E23-250 (with TIO-540 only)

Piper PA-31 Navajo (with TIO-540 only)

Piper PA-31-325 Navajo C/R

Piper PA-31-350 Navajo “Chieftain” Piper PA-31P-350 Mohave

Piper T-1020 (same as PA-31-350) Piper A-32(R)-301T Turbo Saratoga

Aerostar PA-60-600, PA-60-601, PA-60-601P PA-60-602P, and PA-60-700P

Requirement: 1. Carry out a visual inspection of the hub using a 10X glass looking for signs of cracking or grease leakage. Replace any hub found cracked prior to further flight. Perform an eddy current or dye penetrant inspection in accordance with the procedures specified in Hartzell SB 165E on any of the above specified model and S/N propellers installed on any 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.

2. For all other aircraft types listed in this Directive carry out a visual inspection of the hub using a 10X glass looking for signs of cracking or grease leakage. Replace any hub found cracked prior to further flight. Perform an eddy current or dye 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.