EASA AD No.: 2015-0052-E

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EASA EMERGENCY AIRWORTHINESS DIRECTIVE

AD No.: 2015-0052-E

Date: 27 March 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:

SOLO Kleinmotoren GmbH

Type/Model designation(s):

Solo 2350 C engines

TCDS Number: EASA.E.219

Foreign AD: Not applicable

Supersedure: This AD supersedes EASA AD 2013-0217R1 dated 05 May 2014.

ATA 72 Engine – Operation Restriction

Manufacturer(s): Solo Kleinmotoren GmbH

Applicability: Solo Model 2350 C engines, all manufacturer serial numbers equipped with a 

non-foldable propeller.

These engines are known to be installed on, but not limited to:

DG-Flugzeugbau Model DG-1000T powered sailplanes.

Reason: An occurrence of engine shaft failure and consequent propeller detachment 

was reported on a Solo 2350 C engine.

This condition, if not corrected, could lead to additional cases of release of the 

propeller from the engine, possibly resulting in damage to the sailplane, or 

injury to persons on the ground.

To address this unsafe condition, EASA issued Emergency AD 2013-0217-E 

to prohibit operation of the engine.

After that AD was issued, Solo Kleinmotoren GmbH developed instructions to 

install a modified excenter axle-pulley assembly, allowing to resume operation 

of the engine. This optional modification was introduced through EASA AD 

2013-0217R1.

Since that AD was issued, another occurrence of engine shaft failure and 

propeller detachment was reported on a Solo 2350 C engine which had been 

modified in accordance with Solo Kleinmotoren Service Bulletin (SB) 4603-14.

For the reasons described above, this AD supersedes EASA AD 2013-0217R1

and, pending the availability of EASA approved modification instructions, 
EASA AD No.: 2015-0052-E

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prohibits operation of all Solo 2350 C engines, including those engines which 

have been modified in accordance with Solo Kleinmotoren SB 4603-14. This 

AD also requires a one-time inspection of the propeller shaft to detect cracks 

and the reporting of findings.

This AD is considered to be a temporary measure and further AD action will 

follow.

Effective Date: 31 March 2015

Required Action(s) 

and Compliance

Time(s):

Required as indicated, unless accomplished previously:

(1) From the effective date of this AD, do not operate the engine, unless the 

engine is modified in accordance with EASA approved instructions which 

remove the operational restriction imposed by this AD.

(2) Modification of an engine in accordance with the instructions of Solo 

Kleinmotoren SB 4603-14 is not acceptable to comply with paragraph (1) 

of this AD.

(3) Within 30 days after the effective date of this AD, accomplish a one-time 

inspection (magnetic particle or dye penetrant, refer to Solo Inspection 

Instruction 4603-1 as an acceptable procedure) of the propeller shafts and 

report the results, also if there are no findings, to Solo Kleinmotoren GmbH 

(see address below). No findings during the inspection do not remove the 

operational restriction imposed by paragraph (1) of this AD.

Ref. Publications: Solo Inspection Instruction 4603-1, dated 26 March 2015.

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:

Solo Kleinmotoren GmbH, Postfach 600152, 

71050 Sindelfingen, Germany

Telephone: +49 7031 301-0, Fax: 49 7031 301-136,

E-mail: aircraft@solo-germany.com.