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No. 2541-S-29              SAFETY INFORMATION NOTICESUBJECT: HYDRAULIC POWER               New hydraulic pump drive (POST ...
No. 2541-S-29Revision 0   2012-12-24                                                             Page 2/4                 ...
No. 2541-S-29Extract / comment of the TaskFor the hydraulic pump:       DI: Detailed Inspection.Check of the belt of the b...
No. 2541-S-29Extract / comment of the TaskFor the hydraulic pump:           RIG: Rigging                                  ...
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Sin2541 s-29-rev0-en

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Sin2541 s-29-rev0-en

  1. 1. No. 2541-S-29 SAFETY INFORMATION NOTICESUBJECT: HYDRAULIC POWER New hydraulic pump drive (POST MOD 07-9566) For the attention of AIRCRAFT Version(s) CONCERNED Civil Military AS350 B, BA, BB, B1, B2, B3, D L1 AS550 A2, C2, C3, U2 EC130 B4, T2Several incidents have been reported on AS350 B3 and EC130 B4 helicopters (between 330 and 700 hours). Theincidents were due to seizing of the hydraulic pump drive pulley bearing (POST MOD 07-9566). These incidents ledto rupture of the drive belt.These incidents are currently undergoing investigation in order to determine the cause.Without predicting the conclusions of these investigations, EUROCOPTER issues this Safety Information Notice, inorder to remind you that it is important to comply with the maintenance operations associated with this newhydraulic pump drive (The Technical Documentation is currently being updated for some versions).1. At present, the sensitive check of the bearing must be performed every 150 flying hours or 12 months, the first limit reached is applicable (example: for version B3, refer to AMM Task 63-11-00,6-15). Only the detailed inspection (DI) of the bearing is to be performed. The bearing must not be lubricated at this time limit.2. Remove the belt to perform the sensitive check of the hydraulic pump drive bearing.3. During the manual check of the bearing, perform several full turns with the bearing, in order to detect possible rough points, brinelling or bearing noise (a "scraping" bearing can be a sign for internal damage).4. If any doubt arises during this check, remove and replace hydraulic pump drive assembly 350A35-0132-00.5. The re-lubrication of the bearing must be performed at 600H // 24M intervals as indicated in the MSM Task ("LUB").EUROCOPTER informs you that a Service Bulletin will be issued in January 2013 to reduce the check interval from150 to 50 flying hours for AS350/AS550 helicopters and introduce a check at 50 flying hours for the EC130.Pending this, EUROCOPTER underlines that it is very important to perform the sensitive check of the bearing andto contact the EUROCOPTER Technical Support (DynComp.Technical-Support@eurocopter.com) if you are indoubt.Revision 0 2012-12-24 Page 1/4 This document is available on the internet: www.eurocopter.com/techpub
  2. 2. No. 2541-S-29Revision 0 2012-12-24 Page 2/4 This document is available on the internet: www.eurocopter.com/techpub
  3. 3. No. 2541-S-29Extract / comment of the TaskFor the hydraulic pump: DI: Detailed Inspection.Check of the belt of the bearing: • Belt: o AMM Task 63-11-00, 6-2 b (Post MOD 079555) • Bearing: o AMM Task 63-11-00, 6-15 Visual check of the bearing, Sensitive check of the bearing, The bearing must not be re-lubricated at this time limit. A new bearing must not be re- lubricated upon installation.Revision 0 2012-12-24 Page 3/4 This document is available on the internet: www.eurocopter.com/techpub
  4. 4. No. 2541-S-29Extract / comment of the TaskFor the hydraulic pump: RIG: Rigging DI: Detailed Inspection LUB: LUBricationCheck of the belt of the bearing: • Belt: o AMM Task 63-11-00, 6-2 b (Post MOD 079555) • Bearing: o AMM Task 63-11-00, 6-15 Visual check of the bearing, Sensitive check of the bearing, The bearing must be re-lubricated at this time limit.Revision 0 2012-12-24 Page 4/4 This document is available on the internet: www.eurocopter.com/techpub

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