EASA

EASA AD No: 2010-0019

AIRWORTHINESS DIRECTIVE

AD No,: 2010·0019

Date: OSFebruary 2010

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

(Eel No 21612008 on behalf 0,1the European Community, its Member Stales and of the Europe"n

third countries that participate in the activities 01EASA under Article 66 or thal Regulation.

This AD is issued in accordance wiHl EC 170212003,P"rt 21A,38, In accordance with EC 204212003Annex I, Part M.A.301, the

continuing airvvorthiflSSSof an aircraft shall be ensured by accomplishing any ~pplic8ble ADs, Consequently, no person may operate an

aircraft 10 which an AD applies. except in accord~nce with the requiremsnts of that AD unless otherwise specified by the Agency IEC

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

Type Approval Holder's Name;

AIRBUS

1;ype/Model designation(s) :

.l\300 aeroplanes

TCDS Number

Foreign AD.

Supersedure:

ATA27

Manufacturer(s):

Applicability:

Reason:

Effective Date:

EASA Form 110

France N° 145

Not applicable

None

Flight Controls ~ Trimmabla Horizontal Stabilizer Actuator (THSA)

Upper Attachment - Inspection

Airbus (formerly Airbus Industrie)

Airbus A300 aeroplanes, all models, all serial numbers.

In accordance with design regulation, the THSA has a failsafe design. lis upper

attachment to the aeroplane has two load paths, a Primary Load Path (PLP) and

a Secondary Load Path (SLP), which is only engaged in case of PLP failure,

Following the design intent, engagement of the SLP leads to jam the THSA,

indicating the failu~e of the PLP.I

Tests carried out under the ioads-measured during representative flights have

demonstrated that, when the S~P is engaged, it does not systematically jam the

THSA. In addition, laboratory te~ts have confirmed that the SLP will only

withstand the loads for a limitedjperiod of time.

This condition of PLP failure dur1ing an extended period of lime, if not detected

and corrected, would lead to the rupture of the THSA upper attachment and

consequent THSA loss of comrr\and, resulting in reduced control of the

aeroplane.

For the reasons staled above, this AD requires repetitive inspections to detect if

damage exists to the THSA uppkr attachment and if the SLP has been engaged

and corrective actions, dependi7g on findings.

19 February 2010

Page 1/2
EASAAD No 2010·0019

Required as indic1ted, unless accomplished previously:

(1) Within 2 500 IFII9ht Hours (FH) after the effective date of this AD and

thereafter at intervals nol to exceed 2 500 FH, perform a detailed visual

inspection of Ithe THSA upper allachment and screw shaft in accordance

with the instructlons of Airbus Service Bulletin (5B) A300-27-0203, as

Required Action(s) applicable to laeroPlane model.

and Compliance (2) If, during any inspection as required by paragraph (1) of this AD, metallic

Time(s): particles are found or the inspection result reveals cracks, scratches or

missing mat~rial, before next flight, contact Airbus 10 obtain approved

corrective aclion instructions and accomplish those instructions accordingly.

(3) AccomPlish~ent of corrective actions as required by paragraph (2) of this

AD does not bonstitute terminating action for the repetitive inspection

requirementsiof this AD.

Airbus Service B~lIetin A300-27·0203 original issue.

Ref. Publications: The use of later a~proved revisions of this document is acceptable for

compliance with rfquirements of this AD.

1. If requested 1nd appropriately substantiated, EASA can approve Alternative

Methods of ~omPliance for this AD.

2 This AD was posted on 04 January 2010 as PAD 10-001 for consultation

until 01 February 2010. No comments were received during the consultation

Remarks. 3.

period. I

Enquiries regarding this AD should be referred to the Airworthiness

Directives, S~fety Management & Research Section, Certification

Directorate, EA5A. E-maii ADs@easa.europa.eu.

4 For any qUeS~iOnconcerning the technicai content of the requirements in

this AD, pleake contact: AIRBUS SA$ - EAW (Airworthiness Office,

Telephone: 133 5 61 933696, Fax: + 33 5 61 934451).

EASA Form 110 Page 2/2