Federal Department of the Environment, Transport, Energy and

Communications DETEC

Federal Office of Civil Aviation FOCA

Safety Division

- Aircraft

Lufttüchtigkeitsanweisung (LTA)

Consigne de Navigabilité (CN)

Direttive sulla Navigabilità (DN)

Airworthiness Directive (AD) FOCA AD



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- 20 14

- 008

Inkraftsetzung

Mise en vigueur

Entrata in vigore

Effective Date 23 December 20 14 

### Pilatus

– PC

- 7

FOCA TC/TCDS No: F 56

- 20

1 / 2

Rechtsgrundlage: Art. 26, 51 und 51A (Verordnung über die Lufttüchtigkeit von Luftfahrzeugen: SR 748.215.1)

Base juridique: Art. 26, 51 et 51A ( Ordonnance sur la navigabilité des aéronefs: SR 748.215.1)

Base giuridica: Art. 26, 51 e 51A ( Ordinanza concernente la navigabilità degli aeromobili: SR 748.215.1)

Legal base: Art. 26, 51 and 51A ( Ordinance on the airworthiness of aircraft: SR 748.215.1) Issue D ate: 09 December 20 14

ATA Chapter : ATA 21

– A ir Conditioning

Su bject: A ir C onditioning

– Compressor Cover Assembly

– Installation

Su persedure / R e vi sed

AD(s): Not applicable

Type Certificate Holder’s Name: Pilatus Aircraft Ltd.

Manufacturer(s): Pilatus Aircraft Ltd.

Applicability: Model PC

- 7 aircraft, Manufacturer Serial Numbers (MSN) 101 through

MSN 607, Pre Service Bulletin 21

- 006.

Reason: This Airworthiness Directive (AD) is prompted due to an unprotected routing of the oil cooler inlet

- hose close to the air conditioning compressor

clutch plate.

If a spring on the compressor clutch plate shears it could lead to a damage of the oil hose and the engine oil can spill into the engine bay.

In order to correct and control the situation, this AD requires the installation of a cover assembly which will be mounted on the attachment points

of the compressor.

Required A c tion(s)

and Compliance

Time(s): Req uired as indicated below, unless already acco m plished:

(1) Within the nex t 120 days after the effective date of this AD, install a

cover assembly on the attachment points of the compressor as

required by paragraph (§) 3.B. of PILATUS PC

- 7 Service Bulletin

No. 21

- 012.

Ref. Public a tion(s): PILATUS PC

- 7 Service Bulletin No. 2 1

- 012, initial issue.

The use of later approved revisions of this document is acceptable for

compliance with the r e quirements of this AD.

For further inform a tion

co n tact: The applicable manufacturer’s documentation may be obtained directly

from:Lufttüchtigkeitsanweisung (LTA)

Consigne d e Navigabilité (CN)

Direttive sulla Navigabilità (DN)

Airworthiness Directive (AD) FOCA AD



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Rechtsgrundlage: Art. 26, 51 und 51A (Verordnung über die Lufttüchtigkeit von Luftfahrzeugen: SR 748.215.1)

Base juridiq ue: Art. 26, 51 et 51A ( Ordonnance sur la navigabilité des aéronefs: SR 748.215.1)

Base giuridica: Art. 26, 51 e 51A ( Ordinanza concernente la navigabilità degli aeromobili: SR 748.215.1)

Legal base: Art. 26, 51 and 51A ( Ordinance on the airworthiness of a ircraft: SR 748.215.1) PILATUS AIRCRAFT LTD.

Customer Technical Support (MCC)

P.O. Box 992

CH

- 6371 Stans, Switzerland

Tel.: +41 (0)41 619 67 74 Fax: +41 (0)41 619 6 7 7 3

E

- mail: Techsupport@pilatus

- aircraft.com

For furth er information contact:

FEDERAL OFFICE OF CIVIL AVIATION (FOCA)

Design and Production (STEH)

CH

- 3003 Bern, Switzerland

E

- mail: airdir@bazl.admin.ch