Textron Bell 412EP - Airworthiness Limitations Schedule

BHT-412-MM-2 FAA APPROVED
4-00-00
Page 6 Rev. 27 25 SEP 2018
Export Classification C, ECCN EAR99
WARNING
SOME PARTS ARE INSTALLED AS
ORIGINAL EQUIPMENT ON BOTH
MILITARY AND COMMERCIAL
HELICOPTERS AND MAY HAVE A
LOWER AIRWORTHINESS LIFE AND/OR
OVERHAUL SCHEDULE WHEN USED
ON A MILITARY HELICOPTER. IN
ADDITION, CIRCUMSTANCES
SURROUNDING THEIR USE MAY CALL
FOR OPERATION OF THE MILITARY
HELICOPTER OUTSIDE OF THE
APPROVED COMMERCIAL FLIGHT
ENVELOPE. CONSEQUENTLY, PARTS
THAT HAVE BEEN USED ON MILITARY
HELICOPTERS SHOULD NOT BE USED
ON COMMERCIAL HELICOPTERS.
CAUTION
AIRWORTHINESS LIFE OF SOME KIT
COMPONENTS MAY NOT BE COVERED
IN THIS SCHEDULE. REFER TO
APPLICABLE SERVICE INSTRUCTION
(SI) OR MAINTENANCE MANUAL
SUPPLEMENT (MMS) FOR KIT
COMPONENTS SCHEDULE.
NOTE
The airworthiness life given or the failure to
give an airworthiness life to a component
does not constitute a warranty of any kind.
The only warranty applicable to the
helicopter or any component is the
warranty included in the Purchase
Agreement for the helicopter or the
component.
The airworthiness lives given to the components and
assemblies are determined by experience, tests and
the judgement of Bell Helicopter engineers. The
airworthiness lives and inspection intervals cannot be
changed without the approval of the FAA.
Prior to disposing of unsalvageable helicopter parts
and materials, caution should be exercised to ensure
that the parts and materials are disposed of in a
manner that does not allow them to be returned for
service. Refer to FAA Advisory Circular 21-38 for
guidance on the disposal of unsalvageable aircraft
parts and materials.
Table 4-1. Airworthiness Limitations Schedule
NOMENCLATURE PART NUMBER AIRWORTHINESS LIFE
MAIN ROTOR HUB
Yoke Assembly 412-010-101-109 700 hours
Yoke Assembly 412-010-101-123 5000 hours
Yoke Assembly 412-010-101-137 4500 hours
Yoke Assembly 412-010-101-139 3000 hours
Spindle Assembly 412-010-156-105 5000 hours
Spindle and Damper Bearing Assembly 412-010-190-101 5000 hours
Spindle and Damper Bearing Assembly 412-010-190-103 10,000 hours
Spindle and Shear Bearing Assembly 412-310-102-101 10,000 hours
1
5
7
38
5
33
5
7
22