Document ID: chunk:federal_register_of_legislation:F2014L01324:body:0:p2
Version: federal_register_of_legislation:F2014L01324
Segment Type: other
Provision Reference: 
Character Range: 3012–5515

by other than a leak in the blade seal, the pressure relief valve, or actuator assembly, remove the propeller from service.

                  Note 3:  FAA AD 94-06-05 Amdt 39-8853 refers.
Compliance:       1. (a) Unless previously accomplished in accordance with the original issue or amendment 1, 2 or 3 of this Directive, within 30 days from the effective date of this Directive.

                  (b) Before further flight, based on Requirement 1.(a) findings.

                  (c) Concurrently with Requirement 1.(b).

                  (d) Before further flight, based on Requirement 1.(c) findings.

                  (e) Before further flight following completion of initial torque check per requirement 1.(a).

                  (f) Following completion of Requirement 1.(a) and 1.(e) of this Directive.

                2. At intervals not to exceed 500 flight hours.

                3. From the effective date of this Directive.

                  4. (a) At intervals not to exceed 70 flight hours.

                  (b) Before further flight after the effective date of this Directive.
             The effective date of this AD is 7 October 2014.
Background:  This Directive was originally issued to address manufacturer's torqueing procedures for the propeller hub retaining nuts, which was insufficient to prevent fretting during normal propeller operation.  If allowed to continue, cracking of the propeller hub may occur.

             AD/PHS/18 Amdt 1, which became effective on 27 November 2003, removed references to manufacturers' temporary revision and instead referred to the manufacturers publications that incorporate the correct values and procedures for torqueing the propeller hub retaining nuts.

   AD/PHS/18 Amdt 2, which became effective on 9 June 2005, corrected errors in Amendment 1 of the Directive with no change to the intent of the Directive.

   AD/PHS/18 Amdt 3, which became effective on 22 November 2007, clarified the loosening of the propeller hub retaining nuts and recording of the torque values in the propeller maintenance records (which only has to be done initially and when a propeller is installed to the aircraft) and brings the oil leakage inspection interval in line with FAA AD 94-06-05.

   This AD, AD/PHS/18 Amdt 4, clarifies the requirement of the non-destructive inspection method and makes minor editorial changes throughout the text.

Mike Higgins
Delegate of the Civil Aviation Safety Authority

30 September 2014