EASA AD No.: 2015-0025-E 

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EASA EMERGENCY AIRWORTHINESS DIRECTIVE 

AD No.: 2015-0025-E 

Date: 18 February 2015 

Note: This Emergency Airworthiness Directive (AD) is issued by EASA, acting in accordance 

with Regulation (EC) No 216/2008 on behalf of the European Community, its Member States 

and of the European third countries that participate in the activities of EASA under Article 66 of 

that Regulation.

This AD is issued in accordance with EU 748/2012, Part 21.A.3B. In accordance with EU 1321/2014 Annex I, Part M.A.301, the 

continuing airworthiness of an aircraft shall be ensured by accomplishing any applicable ADs. Consequently, no person may operate an 

aircraft to which an AD applies, except in accordance with the requirements of that AD, unless otherwise specified by the Agency [EU 

1321/2014 Annex I, Part M.A.303] or agreed with the Authority of the State of Registry [EC 216/2008, Article 14(4) exemption]. 

Design Approval Holder’s Name: 

AGUSTAWESTLAND S.p.A 

Type/Model designation(s): 

A109A and A109AII helicopters 

TCDS Number: EASA.R.005 

Foreign AD: Not applicable 

Supersedure: None 

ATA 62 Rotor(s) – Main Rotor Blades – Identification / Replacement 

Manufacturer(s): AgustaWestland S.p.A. 

Applicability: A109A helicopters, serial numbers (S/N) from 7154 through 7255 inclusive, and 

A109AII helicopters, all S/N. 

Reason: Occurrences were reported involving installation of a Main Rotor Blade (MRB) 

having a Part Number (P/N) 109-0103-01-7 on A109AII helicopters. The 

subsequent investigation identified that, although MRB P/N 109-0103-01-7 is 

eligible for installation on A109A helicopters up to S/N 7153 only, for A109A 

and A109AII helicopters, the current Illustrated Part Catalogue (IPC) provides 

incorrect information that inadvertently appears allowing installation of that 

MRB P/N on all helicopters. 

This condition, if not detected and corrected, could lead to further cases of 

incorrect MRB installation and non-compliance with the approved type design 

resulting in a possible MRB failure. 

To address this potential unsafe condition, AgustaWestland issued Alert 

Bollettino Tecnico (BT) 109-142 to provide identification and replacement 

instructions. AgustaWestland plans to update the IPC to correct the allowed 

MRB P/N(s) applicable for various helicopter configurations. 

For the reasons described above, this AD requires identification of each MRB 

P/N and, depending on findings, replacement of the affected MRB. This AD 

also prohibits installation of MRB P/N 109-0103-01-7 on A109A helicopters 

from S/N 7154 through 7255 inclusive and on A109AII helicopters. 
EASA AD No.: 2015-0025-E 

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Effective Date: 20 February 2015 

Required Action(s) 

and Compliance 

Time(s): 

Required as indicated, unless accomplished previously: 

(1) Within 10 flight hours after the effective date of this AD, inspect each MRB 

to identify the P/N in accordance with the instructions of AgustaWestland 

Alert BT 109-142. 

 A review of helicopter continuing airworthiness records is acceptable to 

make the identification of an affected MRB, in lieu of the inspection 

required by this AD, provided those records are sufficiently accurate and 

can be relied upon for the purpose of this requirement. 

(2) If, during the identification, as required by paragraph (1) of this AD, a MRB 

having a P/N 109-0103-01-7 is found to be installed, before next flight, 

replace the affected MRB with a MRB having a P/N 109-0103-01-9 or P/N 

109-0103-01-115 in accordance with the instructions of AgustaWestland 

Alert BT 109-142. 

(3) From the effective date of this AD, do not install a MRB P/N 109-0103-01-7 

on affected helicopters. 

Ref. Publications: AgustaWestland Alert BT 109-142 original issue, dated 17 February 2015. 

The use of later approved revisions of this document is acceptable for 

compliance with the requirements of this AD. 

Remarks: 1. If requested and appropriately substantiated, EASA can approve 

Alternative Methods of Compliance for this AD. 

2. The results of the safety assessment have indicated the need for 

immediate publication and notification, without the full public consultation 

process. 

3. Enquiries regarding this AD should be referred to the Safety Information 

Section, Certification Directorate, EASA. E-mail: ADs@easa.europa.eu. 

4. For any question concerning the technical content of the requirements in 

this AD, please contact: 

AgustaWestland S.p.A. Customer Support 

Via del Gregge, 100 - 21015 Lonate Pozzolo (VA) – Italy 

Telephone + 39 0331-664396 ; Fax: + 39 0331-664680 

E-mail: custserv@agustawestland.com.