[IAE] v2500发动机航线维护培训Thrust Reverser System

Thrust Reverser System
Chapter 78
SECTION 15

Section Objectives
At the end of this section, the student will be able to: • Identify, describe and locate associated Thrust Reverse System LRUs • Describe the system’s normal operation, indications and protection devices together with any associated recovery activities • Describe the routine and non-routine maintenance activities

THRUST REVERSER SYSTEM
•Assists in aircraft retardation
•Translating cowl type using “C” duct by-pass air via blocker doors and cascades (core engine flow continues in a rearward direction)
• Electronic control, hydraulic actuation with positional feedback
•Produces about 5000lbs of reverse thrust @ 71% N1
•Flight deck selectable with EEC monitor and control
•Manual operation, lock-out and override

OPERATION:
•Uses aircraft hydraulic system @ 3000psi (skydrol)
•Selected lifting thrust reverse levers on front of  throttles and pulling them back from the Idle detent
•Controlled by EEC incorporating:
1.Safe normal deployment and stowage
2.Electrical inhibit relays to prevent uncommanded deployment
3.Electro-Hydraulic shut off valve to isolate system in flight
4.Auto restow when uncommanded deployment detected
5.Return engine to idle thrust if Auto restow unsuccessful
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Summary
After this section, you should now be able to: • Identify, describe and locate associated Thrust Reverse System LRUs • Describe the system’s normal operation, indications and protection devices together with any associated recovery activities • Describe the routine and non-routine maintenance activities