AD/TBM 700/54 Landing Gear Wheels & Brakes Master Cylinder Yoke Inspection/Replacement (Cth)

AIRWORTHINESS DIRECTIVE

On the effective date specified below, and for the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.001 (1) of CASR. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct an unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

Socata (Aerospatiale) TBM700 Series Aeroplanes

AD/TBM 700/54 Landing Gear - Wheels & Brakes - Master Cylinder Yoke - Inspection/Replacement 4/2019

Applicability:

Socata TBM 700 aircraft with serial number (S/N) 1 to 268 and S/N 270 to 338 inclusive.

Requirement:

1.     Check for misalignment of the master cylinder yokes from their threaded pins, as instructed in the accomplishment instructions paragraph of the SOCATA Service Bulletin 70-136 (the SB), as in force from time to time,

a.     If a yoke is satisfactory, proceed to its re-installation on the aircraft, or

b.    If a yoke is defective, discard the yoke and install a new serviceable one that meets the terms of the SB.

2.     Do not install yokes part number (P/N) ZOO.N7134732200 or yokes in master cylinder assembly P/N ZOO.N6068757280 (LH side) and ZOO.N6068757281 (RH side) delivered as spares before 1 December 2005 unless they comply with SOCATA Service Bulletin N° 70-136, as in force from time to time.

Recording completion of this AD in the aircraft logbook can only be done after a satisfactory inspection and/or replacement of all defective yokes.

Note 1:  EASA AD 2006-0189 refers.

Note 2:  The words “as in force from time to time” require compliance with the most recent version of the referenced document.

Compliance:

1.    Unless previously accomplished, during the next 100-hourly scheduled inspection, or during the next annual inspection, whichever occurs later.

2.    From the commencement date of this AD.

This AD commences on 22 February 2019.

Background:

This AD results from a report of a master cylinder yoke failure.

The AD requirements are to detect defective yokes on aircraft or held as spares and replace them with new ones.

The aim of this AD is to ensure that normal braking is available at any time to prevent possible runway excursions in the event of failure of the master cylinder yoke.

Pieter van Dijk
Delegate of the Civil Aviation Safety Authority

11 February 2019