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AD/AL 250/91 Airworthiness Directives as made
This instrument requires removal from service of certain Rolls Royce Allison 250 series engine compressor modules which may not have had inspections or repairs carried out in accordance with manufacturer approved procedures.
Administered by: Infrastructure, Transport, Regional Development and Communications
Exempt from sunsetting by the Legislation (Exemptions and Other Matters) Regulation 2015 s12 item 15
Registered 13 Mar 2020
Tabling HistoryDate
Tabled HR23-Mar-2020
Tabled Senate23-Mar-2020
Date of repeal 24 Mar 2020
Repealed by AD/AL 250/91 Amdt 1 Engine Compressor Module - Removal from Service

AIRWORTHINESS DIRECTIVE

On the commencement 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.

Rolls-Royce (Allison) Turbine Engines - 250 Series

AD/AL 250/91

Engine Compressor Module - Removal
from Service

6/2020

 

Applicability:

All Rolls-Royce Allison 250 series engines.

Requirement:

1.    Review engine logbooks and determine if a compressor module with a serial number listed in Table 1 is installed in the engine.

2.    Remove any affected compressor module from service.

Table 1: affected compressor modules

C20B series engines

C20R series engines

C28 series engines

C30 series engines

C47 series engines

Affected Compressor Module Serial Numbers:

CAC23900

CAC30243

CAC30972

CAC31216

CAC31394

CAC32128

CAC33247

CAC33931

CAC34205

CAC35463

CAC36132

CAC37795

CAC37814

CAC37978

CAC38521

CAC39053

CAC40093

CAC40446

CAC40483

CAC40560

CAC41262

CAC41846

CAC41917

KR86023

CAC42465

CAC15280

CAC15850

CAC15973

CAC 28209

CAC28017

CAC28022

CAC28119

CAC70026

CAC70779

CAC28046

CAC90011

CAC90052

CAC90069

CAC90507

CAC90719

CAC91305

CAC91311

CAC91507

CAC91607

CAC91623

CAC91635

CAC91820

CAC98516

CAC98537

CAC44294

CAC45072

 

3.    All affected compressor modules must be returned to an approved maintenance organisation for repair in accordance with Rolls-Royce approved overhaul or repair data.

Compliance:

1.    Before further flight.

2.a.  For C20B and C20R series engines: Before further flight.

2.b. For C28, C30 and C47 series engines: the earlier of the following:

(i)    within 50 hours’ time in service,

(ii)   12 April 2020,

(iii) next engine shop visit.

3.    Before returning to service.

            For aircraft located away from a maintenance facility, a special flight permit may be issued for one non-revenue ferry flight to return the aircraft to the nearest maintenance facility to carry out the requirements of this AD.

            CASA is to be notified of any engines found to have an affected module fitted via the Defect Reporting Service.

Note:  Civil Aviation Authority of New Zealand (CAA NZ) Airworthiness Directive DCA/AL250/60 has been referenced as a source document for Table 1.

 

This AD commences on 17 March 2020.

Background:

A recent audit of a New Zealand maintenance organisation by CAA NZ has determined that compressor module inspections and repairs of these modules may not have been carried out in accordance with approved Rolls-Royce procedures.

A drawing of a face

Description automatically generated

Pieter van Dijk
Delegate of the Civil Aviation Safety Authority

13 March 2020