EASA SIB No.: 2017-06
Safety Information Bulletin
Airworthiness
SIB No.: 2017-06
Issued: 15 May 2017
Subject: Torque Transducer Oil Pressure Pipe P-Clamp Installation
Ref. Publications:
Pilatus PC-12 Service Letter (SL) 192, original issue, dated 20 April 2017.
Applicability:
Pilatus PC-12, PC-12/45, PC-12/47 and PC-12/47E aeroplanes.
Description:
An occurrence was reported on a PC-12/47 aeroplane where oil pressure and oil temperature
warnings were activated and eventually the engine suffered internal damage caused by oil
starvation.
Investigation results identified that the P-clamps on the torque transducer oil pressure pipes were
not installed as instructed in the applicable Aircraft Maintenance Manual (AMM).
Prompted by these findings, to prevent such events in the future, Pilatus issued PC-12 SL 192 to
highlight the importance of the correct installation of the torque transducer oil pressure pipe P-
clamps.
At this time, the safety concern described in this SIB is not considered to be an unsafe condition
that would warrant Airworthiness Directive (AD) action under Regulation (EU) 748/2012, Part
21.A.3B.
Recommendation(s):
EASA recommends owners and operators to accomplish the actions as specified in Pilatus PC-12
SL 192.
Contact(s):
For further information contact the EASA Safety Information Section, Certification Directorate.
E-mail:
[email protected].
For a copy of the referenced SL, or further information regarding the technical content of this SIB,
please contact Pilatus via e-mail:
[email protected].
This is information only. Recommendations are not mandatory.
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