Method for eliminating airplane idling shutdown faults

Abstract

The invention discloses a method for eliminating airplane idling shutdown faults and aims to solve the problem of Cirrus SR20 airplane idling shutdown faults. Engine main pump performance screening iscarried out, and replacement is decided according to the stability degree of an idling working point. In order to reduce the influence of an auxiliary pump on a main pump, the optimal reference working point of an engine is optimized in a normal slow running state; in order to master the performance of the engine in real time, the comprehensive performance of an aircraft-engine fuel system is monitored and checked during operation; an unloading hole is formed in the bottom of a damping cavity, so that damping is reduced, and therefore, the stability performance of a main pump idling valve isoptimized. With the method of the invention adopted, the offset condition of the reference working point of the main pump can be conveniently monitored, and the performance of the engine is mastered in real time; parameters can be set according to a certain basis, and troubleshooting and part replacement are performed in a targeted manner; after the unloading hole is formed, main pumps which are originally eliminated can be reserved after passing secondary screening, so that the expensive primary pumps are utilized, and therefore, economical efficiency is improved with reliability ensured.

Description

technical field [0001] The invention relates to an aircraft maintenance technology, in particular to a method for eliminating the slow parking failure of an aircraft, and more particularly to a method for eliminating the slow parking failure of a Cirrus SR20 aircraft. Background technique [0002] The SR20 aircraft produced by Cirrus Design Company of the United States is known as the "BMW in the air". It adopts the composite material structure of the whole aircraft and is equipped with a parachute system. Wide range of applications, Cirrus's SR series aircraft has more than 6,000 aircraft in the world. [0003] The Cirrus SR20 aircraft is equipped with the IO-360-ES aviation piston engine produced by the American TCM company. During operation, the engine often fails to stop at idle on the ground. Come a lot of psychological pressure. [0004] There are two fuel supply pumps in the Cirrus SR20 aircraft and engine fuel system. One is the electric fuel booster pump located ...

AI Technical Summary

Problems solved by technology

Idle parking is an inherent failure of Cirrus SR20 aircraft. Although the number of Cirrus SR series aircraft in the world has exceeded 6,000, this problem has not been effectively solved for many years; TCM, as a global aviation piston engine manufacturing company, its The product is not uniquely used on Cirrus SR series aircraft, and mostly uses engine fuel injection systems with similar principles, but TCM has not revealed the mechanism of frequent idle stop failures during engine operation

Due to the unknown cause of the failure, frequent engine slow-down failures in operation practice have brought huge psychological pressure to the pilots, and maintenance technicians can only replace a large number of related components of the fuel system on the failed engine, which has brought huge manpower and material resources. loss, but also bring greater flight safety risks

However, the failure mechanism is not clear, and it is difficult to carry out risk assessment on the probability of engine parking in the air. Based on safety considerations, the airworthiness supervision department of the government suspended its SR20 fleet in response to the frequent engine ground slow parking of the SR20 fleet of an aviation operation unit. operation until effective measures are taken

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