Export Control
EAR Export Classification: Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3), except for the following Service Bulletins which are currently published as EAR Export Classification 9E991: SBE70-0992, SBE72-0483, SBE72-0580, SBE72-0588, SBE72-0640, SBE73-0209, SBE80-0024 and SBE80-0025.Copyright
© IAE International Aero Engines AG (2001, 2014 - 2021) The information contained in this document is the property of © IAE International Aero Engines AG and may not be copied or used for any purpose other than that for which it is supplied without the express written authority of © IAE International Aero Engines AG. (This does not preclude use by engine and aircraft operators for normal instructional, maintenance or overhaul purposes.).Applicability
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Common Information
TASK 70-22-02-290-501 Dimensional Rounding For Engine Parts
The rounding of dimensions is permitted on commercial engine parts. This task gives the rules for rounding commercial engine part dimensions.
Preliminary Requirements
Pre-Conditions
NONESupport Equipment
NONEConsumables, Materials and Expendables
NONESpares
NONESafety Requirements
NONEProcedure
0.0005 inch or more is rounded up.
Less than 0.0005 inch is rounded down.
For example, on a part with dimension limits of 0.231 inch to 0.235 inch, a reading of 0.2306 inch is rounded up to 0.231 inch and a reading of 0.2354 inch is rounded down to 0.235 inch.
For commercial engine part dimensions given in thousandths of an inch with tolerances of plus or minus 0.002 inch or more, rounding to the nearest thousandth is permitted.
0.005 mm or more is rounded up.
Less than 0.005 mm is rounded down.
For example, on a part with dimension limits of 0.22 mm to 0.32 mm, a reading of 0.215 mm is rounded up to 0.22 mm and a reading of 0.324 mm is rounded down to 0.32 mm.
For commercial engine part dimensions given in hundredths of a millimeter with tolerances of plus or minus 0.05 mm or more, rounding to the nearest hundredth is permitted.
SUBTASK 70-22-02-290-001 Rules For Rounding Commercial Engine Part Dimensions