EASA AD No.: 2010 - 0018 

EASA Form 110 Page 1/2 

 

EASA AIRWORTHINESS DIRECTIVE 

AD No.: 2010-0018 

Date: 04 February 2010 

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 : 

AIRBUS 

Type/Model designation(s) : 

A330 aeroplanes 

TCDS Number : EASA.A.004 

Foreign AD : Not applicable 

Supersedure : None 

ATA 28 Fuel – Wing Tank Fuel Pressure Switch – Replacement 

Manufacturer(s): Airbus (formerly Airbus Industrie) 

Applicability: Airbus A330 aeroplanes, -201, -202, -203, -223, -243, -301, -302, -303, -

321, -322, -323, -341, -342 and -343 models, all Manufacturer Serial 

Numbers, equipped with Part Number (P/N) HTE69000-1 wing tank 

pressure switches installed at Functional Item Number (FIN) locations 

74QA1, 74QA2, 75QA1 and 75QA2.

Reason: An A330 experienced an uncommanded engine #1 in flight spool down, 

which occurred while applying fuel gravity feed procedure, in response to 

low pressure indications from all fuel boost pumps, in both left and right 

wings. 

The investigations revealed that the wing tank pressure switches P/N 

HTE69000-1 had frozen due to water accumulated in their external part, 

causing spurious low pressure indications. 

As per procedure, the main pumps are then switched off, increasing the 

level of unavailable fuel. This, in combination with very low fuel quantities or 

another independent trapped fuel failure scenarios, can lead to fuel 

starvation on the affected engine(s). This condition, if not corrected, could 

lead to a potential unsafe condition. 

This AD requires the replacement of all four wing tank fuel pressure 

switches associated to main pumps by new ones with a more robust design 

preventing water accumulation and freezing. 
EASA AD No.: 2010 - 0018 

EASA Form 110 Page 2/2 

 

Effective Date: 18 February 2010 

Required action(s) 

and Compliance 

Time(s): 

Required as indicated, unless already accomplished : 

Within 5 years after the effective date of this AD, replace all four wing tank 

main pump pressure switches in accordance with the instructions of Airbus 

Service Bulletin (SB) A330-28-3111. 

Ref. Publications: Airbus SB A330-28-3111 at original issue. 

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. This AD was published on 16 October 2009 as PAD 09-126 for 

consultation until 16 November 2009. The Comment Response 

Document can be found at: http://ad.easa.europa.eu/. 

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

Directives, Safety Management & Research Section, Certification 

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

4. For any questions concerning the technical content of the requirements 

in this PAD, please contact: 

AIRBUS SAS – Airworthiness Office - EAL. Fax: +33 5 61 93 45 80. 

E-mail: airworthiness.A330-A340@airbus.com.