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ALERT SERVICE BULLETIN DATE 11-22-10 Be! Helicopter NO. DATE SEP 11, 2007 412-07-123 REV B A Textron Company PAGE 1 of 1 MODEL AFFECTED: 412, 412EP SUBJECT: TAIL ROTOR BLADE ASSEMBLY, INSPECTION HELICOPTERS AFFECTED: All Models 412 and 412EP helicopters serial number 33001 through 33213, 34001 through 34036 and 36001 through 36542.
COMPLIANCE: Prior to next flight.
DESCRIPTION:
The purpose of this bulletin is to achieve complete distribution of the attached RBI letter to Bell Helicopter's current operator list.
Affected tail rotor blades that have been inspected / repaired in accordance with this ASB shall have letter "L vibro-etched immediately following the part number on the tail rotor blade ID tag and returned to service.
APPROVAL:
The engineering design aspects of this bulletin are FAA/ODA approved.
AN APPROPRIATE ENTRY SHOULD BE MADE IN THE AIRCRAFT LOGBOOK UPON ACCOMPLISHMENT
IF OWNERSHIP OF AIRCRAFT HAS CHANGED PLEASE FORWARD TO NEW OWNER
RBI REVISION A November 10, 2010 Bell Product Support Engineering, Rotor Blades Inc. has received a fourth blade in which one tip weight was lost in flight. This blade was balanced during the term of employment of the former RBI technician noted below. This occurrence has prompted RBI to recall all tail rotors balanced during former technician's term of employment.
The list attached includes additional blades RBI now considers suspect. We are asking Bell Product Support to re-issue affected ASB's calling for immediate inspection of affected blades.
September 11, 2007 Mr. Jack Denham Executive Director of Product Support Bell Helicopter Textron Rotor Blades, Inc. (RBI) has received reports of three incidents in which weights were slung from tail rotor blades during flight and causing vibration. The failures reported occurred ranging from 400 flight hours since repair to as short as 12 minutes. We have determined that this may affect most bell models. To ensure safety and to expedite re-inspection required we advise and ask you distribute to fleet on a most urgent basis.
Investigation indicates that tip weight screws may be missing the adhesive applied during the weight and balance process on these blades. The blades in question were all processed by one former RBI technician.
RBI has initiated customer contact and inspection of blades to reduce customer impact.
Additionally, we are working with our local FAA representative to ensure regulations are met. I ask Bell support and assistance to ensure DOT and OEM requirements are met for release.
RBI is capable of carrying out inspection to existing requirements. Balance weight screws must be accessed and verified for correct installation. This must be carried out by a Bell approved Rotor Blade Repair Facility.
BEFORE THE NEXT FLIGHT, ALL OPERATORS SHOULD INSPECT THEIR BLADES
USING THE ATTACHED LIST TO DETERMINE WHETHER THEIR BLADES ARE AFFECTED. ALL AFFECTED BLADES SHOULD BE REMOVED FROM SERVICE
IMMEDIATELY AND RETURNED TO AN RBI FACILITY FOR EXAMINATION AND REPAIR.
The list attached includes all blades RBI has determined re-inspection is required on.
Troy Penny Director of Operations Rotor Blades Inc.
Warranty Statement:
Owners / Operators of Bell Helicopters who comply with the instructions in this Bulletin will be eligible to return defective blades identified by serial number in the compliance section of this bulletin to your nearest RBI facility for inspection and repair at no cost. In order to process your request please contact your local RBI facility to make arrangements for the return of the blade or blade's using RBI's FedEx account #2546-92336.
Rotor Blades Inc.
580 St Etienne Road Broussard, LA 70518 Phone 337-839-2119 Fax 337-839-2122 RBI Hawker Limited LIU FZS1 BD06/07, JAFZ (South) P.O. Box 16784 Dubai, UAE Phone 971-4-886-0144 Fax 971-4-886-0145 Rotor Blades Limited 5B Crusader Park Bath Road Warmintser Wiltshire BA12 8SJ United Kingdom Phone 44-1985-847040 Fax 44-1985-846356
Part Number S/N 212-010-750-105FM A-10090 A-10836 A-11207 A-11332 212-010-750-113 A-14953 A-15090 CS-12702 212-010-750-113FM A-12240 A-12296 A-12640 A-12670 A-12789 A-13033 A-13096 A-13134 A-13199 A-13264 A-13366 212-010-750-133 A-15602 Part Number S/N 212-010-750-105 A-11923 212-010-750-105FM A-10857 A-11617 A-11828 A-12043 B A-12091 212-010-750-113FM A-12286 A-12398 A-13088 A-13106 A-13539