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Old 2nd Feb 2024, 10:35
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tatyan
 
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Red face RB211-535E4-37/12B & 21B - Difference
Hi All,
Can you help me please to find a difference between the Engine RB211-535E4-37/12B and RB211-535E4-37/21B? What does 12B and 21B mean? B for my understanding its a Profile, but what does 12 and 21 mean? Is it normal practice if LH has /21B at the end and RH has /12B?

Thank you for any advice.
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