Table: tupolev tu - 154
Question: Were any of the accidents in the table caused by a failure of the landing gear or other mechanical issues? Answer with only 'Yes' or 'No' that is most accurate and nothing else.
Step 1 (Operation, Indexing): brief description
Step 2 (Reasoning, Other Commonsense Reasoning): landing gear
Step 3 (Reasoning, Other Commonsense Reasoning): other mechanical issues
Step 4 (Reasoning, Reasoning with Quantifiers): existential, any of the accidents
Answer: Yes