The plane that I was assigned had a known gripe affecting engine starts: a bleed-air
valve on the auxiliary power unit (APU) worked only intermittently.
The post-flight inspection revealed the regulator solenoid in the air turbine start control valve backed out of its housing, allowing uncontained bleed-air
to enter the start assembly.
While doing a special inspection on a E-2D, AD2 Luis Chonggarcia discovered a crack on the starboard, outboard bleed-air
The air flow in the venturi zone is regulated using a bypass air regulator, and a portion of the cleaning air is blown off through a bleed-air
valve at the back of the DeDuster to generate the necessary negative pressure at the DeDuster outlet.
Another system developed since the DC-2 days--and which has both de--and anti-icing capabilities--is the bleed-air
system, which routes air heated in the aircraft's turbine engines to the wings and tail, as well as the engine inlets themselves.
The research is intended to result in the provision of on-board equipment to detect contaminants in engine and auxiliary power unit bleed-air
supplied to cockpits and cabins, and to filter out the contaminants.
The live-fire tests focused on dry bays that are located next to fuel tanks and spaces that house electrical and hydraulic lines, environmental control systems or engine bleed-air
The FE assessed aircraft bleed-air
, forced air cooling, and pressurization systems to determine cause of problem.
designs pipe that water out to the three areas from one tank.
Maintenance discovered that the ECS system had multiple bleed-air
valve failures, causing both the temperature full cold and full hot conditions.