He said the helicopter's pilot did not report mechanical problems, and weather was not an issue.

他说直升飞机驾驶员当时并没有报告飞机出现了机械故障，而且当时天气也没有问题。

youdao

Professor Hansman said the existing evidence suggested that mechanical failure did not lead to the crash but that the pilot was most likely responsible.

汉斯曼表示，现有的证据显示，并非技术上的故障导致飞机坠落，而很有可能是飞行员的责任。

youdao

Here is an important thing to consider: when airlines cancel due to their own fault, such as a mechanical mishap or pilot scheduling screw up, they are liable for expenses their delayed passengers incur.

FORBES: Making Bad Travel Worse: Did Airlines Cancel Early For Hurricane Sandy?

If there is a mechanical problem with a plane, or a pilot is sick, then chances are the flight will be canceled.

NPR: Holding Pattern: Flight Delays are Going Up, Up, Up

The second pilot, unsure whether his colleagues were taking fire or experiencing mechanical problems, ditched his plan to hover over the roof.

NEWYORKER: Getting Bin Laden