EASA AD No.: 2009-0038 

EASA Form 110 Page 1/2 

EASA AIRWORTHINESS DIRECTIVE 

AD No.: 2009-0038 

Date: 18 February 2009 

Note: This 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 EC 1702/2003, Part 21A.3B. In accordance with EC 2042/2003 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 

[EC 2042/2003 Annex I, Part M.A.303] or agreed with the Authority of the State of Registry [EC 216/2008, Article 14(4) exemption]. 

Type Approval Holder’s Name : 

BAE Systems (Operations) Ltd 

Type/Model designation(s) : 

Jetstream 4100 aircraft 

TCDS Number : United Kingdom BA27 

Foreign AD : Not applicable 

Supersedure : This AD supersedes EASA AD 2007-0268 dated 8 October 2007 

ATA 61 Propellers – Propeller Speed Warning System – Installation 

Manufacturer(s): Jetstream Aircraft Ltd, British Aerospace Regional Aircraft Ltd, British 

Aerospace (Operations) Ltd and British Aerospace (Commercial Aircraft) Ltd. 

Applicability: Jetstream 4100 aircraft, all models, all serial numbers. 

Reason: 

During ground manoeuvring, prolonged operation with either engine in the 

restricted range between 82% and 90% RPM will result in damage to the 

propeller assembly that could eventually result in the release of a propeller 

blade. 

To correct this unsafe condition, EASA AD 2007-0268 was issued to require 

the installation of a Propeller Warning Placard and implementation of a 

corresponding Aircraft Flight Manual (AFM) limitation, instructing the flight crew 

to taxi with the condition lever at FLIGHT in order to minimise the time spent by 

the engines in the restricted range. BAE Systems has now developed a 

Propeller Speed Warning System, embodiment of which will allow taxiing with 

the condition lever at TAXI, through the introduction of a revised Flight Manual 

Limitation. 

For the reasons described above, this EASA AD retains the requirements of 

EASA AD 2007-0268, which is superseded, and requires the installation of a 

Propeller Speed Warning System. 

Effective Date: 04 March 2009 
EASA AD No.: 2009-0038 

EASA Form 110 Page 2/2 

Required Action(s) 

and Compliance 

Time(s): 

Required as indicated, unless accomplished previously: 

(1) Within the next 3 months after 22 October 2007 [the effective date of AD 

2007-0268], replace the existing Propeller Limitations Placard in the 

cockpit in accordance with BAE Systems (Operations) Ltd Service Bulletin 

(SB) J41-11-027 and ensure that the AFM contains General Amendment 

G12 and Advance Amendment Bulletin No. 13. 

(2) Within the next 6 months after the effective date of this AD, install a 

Propeller Speed Warning System (modification JM41674) in accordance 

with Section 2 of BAE Systems (Operations) Ltd ACIB J41-61-014 and 

ensure that the AFM contains Particular Amendment P111. 

(3) After modification of an aircraft as required by paragraph (2) of this AD, the 

placard and AFM Advance Amendment Bulletin No. 13 as introduced by 

paragraph (1) of this AD are no longer required and must be removed from 

that aircraft. 

Ref. Publications: 

BAE Systems (Operations) Limited SB J41-11-027 dated 29 March 2007 

BAE Systems (Operations) Limited Jetstream 41 ACIB J41-61-014 Issue 6 

Section 2, dated 17 December 2008. 

The use of later approved revisions of these documents 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. This AD was published on 20 January 2009 as PAD 09-018 for 

consultation until 03 February 2009. No comments were received during 

the consultation period. 

3. Enquiries regarding this AD should be referred to the Airworthiness 

Directives, Safety Management & Research 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: 

BAE Systems (Operations) Ltd, Customer Information Department, 

Prestwick International Airport, Ayrshire, KA9 2RW, Scotland, United 

Kingdom; Telephone +44 1292 675207, Facsimile +44 1292 675704; 

E-mail: RApublications@baesystems.com.