The concern sheetOCR
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Airworthiness FAA Concern Sheet Date: 17 August 2009 Full Name Kevin Schwemmer Title Aerospace Engineer (electrical) Organization FAA Department ACE-119W Address 1801 Airport Rd. Room 100 City State ZIP Wichita, KS 67209 Telephone Number 316-946-4174 E-mail kevin.schwemmer(@faa.gov Make, Model, Series, Serial No.:
Beechcraft. Model 390, Premier VIA, Serials RB-4 thru RB-257, RB-259 thru RB-265, RB-268 and RB-269.
Reason for Air vorthiness Concern: The FAA has reccived reports that up to two starter-generator units with have deficient armature insulating materials may have been installed. The deficient armature insulating could cause one or both generators to shut down and not reset.
FAA Description of Airworthiness Concern (Who. What. Where, When. How? Attachments: RA and appropriate dala) There is a concern that one or both starter-generator units with deficient armature insulating materials may have been installed on the identified aircraft. The starter generator armatures with suspect armature fabrication may result in the loss of operation of one or both starter generstors in flight with the inability to reset the affected unit(s).
Request for Information (Proposed Attemate Inspection/Repair Procedures. Cost Impact, Ete. Noter Any conunents orreplies to the FAN need to be as specific as possible. Please provide specific examples to illustrate your comments/concerna: We are currently evaluating what corrective action would be approprinte. The airplane manufacturer has released a mandatory service bulletin (SB24- 3963, May 2009). The airplane manufacturer has requested this be enforced with an Airworthiness Directive which mandates the service bulletin.
Please direct all comments/input to Kevin Schwemmer at the Wichita Aircraft Certification Office no later than September 17, 2009. (Contact information abovc) This Aim hiness Conver Sheet LACS) & intended as a means for FAA Aviation Safety Enaineers to coordmate erroress th attent owner operators through assnelations and type clubs. At this time, the FAA has not made a determinanion at type of corrective action tif any) should be taken. The resolution of this airworthiness concson could involve an AD action or an SAIR. or the FAA could determine that no action is noaded at this tine. The FAA's final determination will depend in part on the information received in response to this ACS.
The FAA endorses discination of this technicel informion to ell manufactirers and requests association and type dubs Miments Attachments: *SDR(s)l | *A/IDS| *SL(s) *SAIB *FAASR/*NTSESR | *AD_ *AMOCL *RAL Notification: PAA! #AOPA Z SEAA Type Club *TC Holder Other: NEAA Response Requested 09/17/09: Emergency (10 days) Alert (30 days) Information (90 days) (Space Bar Adds "X" to Check Boxes) *Service Difficulty Reports (SDRS): Accident/Incident Data System (AIDS); Service Letter (SL); Special Airworthiness Information Bulletin (SAIB);
Federal Aviation Administration (FAA)/National Transportation Safety Board (NTSB) Safety Recommendation (FAASR/NTSBSR): Airworthiness Directive (AD); Alternate Method of Compliance (AMOC); Risk Assessment (RA); Aircraft Owners & Pilots Association (AOPA):
Experimental Aircraft Association (EAA); Type Certificate (TC) Revised 1/24/02