EASA AD No.: 2010-0122-E 

EASA Form 111 Page 1/2

EASA EMERGENCY AIRWORTHINESS DIRECTIVE 

AD No.: 2010-0122-E 

Date: 23 June 2010 

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 Emergency 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 : 

Aircraft Industries, a.s. 

Type/Model designation(s) : 

L-13 and L-13 A BLANÍK sailplanes 

TCDS Number: EASA.A.024 

Foreign AD: Not applicable 

Supersedure: This AD supersedes EASA AD 2010-0119-E dated 18 June 2010. 

ATA 57 Wing – Wing Main Spar - Inspection / Operational Limitation 

Manufacturer(s): Aircraft Industries, a.s, LET k.p., LET a.s. and LETECKÉ ZÁVODY a.s. 

Applicability: L-13 and L-13 A BLANÍK sailplanes, all serial numbers. 

Reason: A fatal accident occurred to a L-13 BLANÍK sailplane, in which the main spar of 

the right wing failed near the root due to positive load. The right wing detached 

from the aircraft and the pilots lost control of the sailplane. 

The preliminary investigation has revealed that the fracture may have been due 

to fatigue. 

The Emergency AD 2010-0119-E required immediate inspection of the main 

spar at the root of the wing to detect fatigue cracking and the accomplishment 

of the relevant corrective actions as necessary. In addition, this AD 2010-0119-

E imposed operational limitations. This AD retains the requirements of AD 

2010-0119-E, which is superseded, and extends the applicability to L-13 A 

BLANÍK sailplanes. 

The requirements of this AD are considered as interim action to immediately 

address this unsafe condition. If, as a result of the on-going investigation, a 

terminating action is later identified, further mandatory actions might be 

considered. 

Effective Date: 23 June 2010 
EASA AD No.: 2010-0122-E 

EASA Form 111 Page 2/2

Required Action(s) 

and Compliance 

Time(s): 

Required as indicated unless previously accomplished: 

(1) After 18 June 2010 [the effective date of AD 2010-0119-E] for L-13 

BLANÍK sailplanes or after the effective date of this AD for L-13 A 

BLANÍK sailplanes, all aerobatics manoeuvres (ie. Roll (Výkrut), Loop 

(přemet), Stalled turn (souvrat), Immelmann turn (překrut), Half roll 

(zvrat), Inverted flight (let na zádech)) are prohibited. The chapter 

“aerobatics” in Flight Manuals listed below became invalid. 

- Do-L13.1111.1 (In Czech language) 

- Do-L13.1111.3 (In English language) 

- Do-L13.1111.2 (In German language) 

- Do-L13.1111.4 (In Spanish language) 

- Do-L13.1111.5 (In Russian language) 

(2) Before next flight, insert this AD in the sailplane ́s Flight Manual and 

inform the pilots accordingly. 

(3) Before next flight, carry out an inspection of the wing critical areas in 

accordance with Aircraft Industries a.s. Mandatory Bulletin No. L13/109a 

“Checking of the connection of the bottom wing suspension with spar cap 

– review of the operation conditions”. 

The inspection must be carried out by qualified maintenance personnel. 

(4) If any cracks are detected during the inspection required by paragraph 

(3) of this AD, no further flights are permitted. 

(5) Within 15 days after 18 June 2010 [the effective date of AD 2010-0119-E] 

for L-13 BLANÍK sailplanes or after the effective date of this AD for L-13 

A BLANÍK sailplanes, submit the information requested by Mandatory 

Bulletin No. L13/109a to Aircraft Industries a.s. for further assessment. 

Ref. Publications: Aircraft Industries a.s. Mandatory Bulletin No. L13/109a “Checking of the 

connection of the bottom wing suspension with spar cap – review of the 

operation conditions”, issue 1 dated 18 June 2010 

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 safety assessment has requested not to implement the full 

consultation process and an immediate publication and notification. 

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: Aircraft Industries, a.s. - Na záhonech 1177, 686 

04 Kunovice, Czech Republic 

Telephone: +420 572 817 660, Fax: +420 572 816 112 

Email: ots@let.cz