Unapproved Parts Notifications | Hartzell Propeller Inc.

The FAA Unapproved Parts Notifications (UPNs) alert and advise the aviation community about the possibility of unairworthy and/or unapproved parts having been placed in service. Hartzell has compiled a collection of Unapproved Parts Notifications (UPNs) that may affect Hartzell propellers currently in service, or propeller maintenance facilities that may be utilized by owners and operators of Hartzell propellers. Also included is a summary listing of FAA notifications (Special Airworthiness Information Bulletins, FAA Advisory Circulars, Unapproved Parts Notifications), in PDF format, that can be viewed online or downloaded.

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Title	Full/Partial	Date	Description
Summary of Other FAA Notifications	Full Document	Sep 24, 2010	Summary List of other FAA Notifications (FAA Advisory Circulars, Unapproved Parts Notificaitons, Special Airworthiness Information Bulletins)that affect Hartzell Propellers
UPN 2004-00146	Full Document	Jun 13, 2005	CSE has approved propellers for return to service that were not overhauled in compliance with prescribed methods
UPN 2004-00041	Full Document	Jun 15, 2005	Millennium Propeller Systems, Inc. (Millennium) Improperly maintained and approved for return to service. Propellers applicable to various types of aircraft.
UPN 2004-00120	Full Document	Dec 24, 2004	Prop Center, El Cajon, CA, Improperly maintained and approved for return to service propellers and propeller governors
UPN 2003-00142	Full Document	Mar 31, 2003	Regarding propellers maintained by T and W Propellers, Inc.
UPN 99-147	Full Document	Jul 17, 2000	Precision Propellers, Inc. is not qualified to perform the cold compression roll process required
UPN 97-012	Full Document	Jul 26, 2000	Affected parts: All propellers maintained, altered or approved for return to service by Thunderbird Propellers, Inc., of Bethany, OK.