SR 3-5710375195
机队有飞机在监控数据中发现前起和右主起空中出现10秒的过渡态。机组并未报告故障。
通过试车验证，执行灯光测试的时候，三个红灯点亮，单译码时会会发现只有前起落架和右主起落架出现WARNING的信号记录，也是左起落架没有信号。分析与灯光测试时PSEU接地信号可能有些关系。
因而，译码遇此类情况，可询问机组当时的操作，并结合液压油量做对比分析。
询问波音无果，并未正面回应
Boeing has reviewed the ref /A/ message and provides the following response.
Review of the provided QAR data did not identily a specific cause of the waming.Warming indications are usualy caused when gear handle position does not aoree witanding gear postion.In such a case there are AMM tests that would be recommended to verity operaton of the landing gear position indication sensors and rioging.The
following AMM operational tests are recommended to be performed:TASK 32-61-31-710-801 MLG Down and Locked Sensor Operational Test
TASK 32-61-41-710-801 NLG Lock Sensor Operational Test
TASK 32-61-51-710-801 NLG Down Position Sensor Operational Test
ASK 32-61-21-710-801 MLG Up and Locked Sensor Operational Test
在进一步追问后，波音表示：
在审查了提供的数据和冲压机测试警告灯功能的电路后，我们不认为记录的警告是按压测试的结果。我们偶尔会收到起落架警告被记录在QAR数据中的报告。据信，记录的警告是由于警告离散电路的电压电平变化造成的。由于机组人员没有报告这一情况，也没有驾驶舱警告效应，我们不认为这是需要进一步排除故障的差异。
目前波音不知道有任何其他压力测试灯会导致QAR数据中记录警告
After review of the provided data and the circuit for the press to test function of the warning lamps we do not believe the recorded warning was the result of the press to test. We have had occasional reports of the landing gear warning being recorded in QAR data. It is believed the recorded warning was due to variances in the voltage levels of the warning discrete circuit. Since this was not reported by the flight crew and had no flight deck effects we would not consider this to be a discrepancy requiring further troubleshooting.
We are not aware of any other press to test lights that will result in warnings being recorded in QAR data.
