T-45C TS, ADV & IUT ENG-10
Hydraulic System Malfunctions
c.
If aircraft operating on only one system and that system's
accumulator fails or if both accumulators fail at once, then
controls rely on EDP pressure only
(1) Flight controls may not respond smoothly
(2) Momentary loss of normal control on high demand
B. Verifications: erratic flight control response during periods of high
demand (a large or rapid control stick displacement)
C. Effects on flight safety
1.
If both accumulators fail, controls rely on EDP pressure only
2.
High systems demand maneuvering could result in rough control
responses and possible loss of maneuverability
III. HYD 1 and HYD 2 slow pressure loss
Fig 3: Hydraulic
A. Indications: in flight, pressure in either system is lower than normal or
Pressure Gauges
visibly decreasing, as indicated by HYD 1 or HYD 2 pressure gauges in
both cockpits
B. Verifications
1.
HYD 1
a.
Pressure continues decreasing
b.
At approximately 1500 psi, loss of general services (e.g., speed
brake) noted
c.
At 600 +/- 50 psi
(1) MASTER ALERT light flashes
Fig 2: Warning and
Caution Advisory
(2) Caution tone sounds
Light Panel
(3) HYD 1 caution light illuminates
2.
HYD 2
a.
Pressure continues decreasing
b.
At 1660 +/- 110 psi
(1) MASTER ALERT light flashes
(2) Caution tone sounds
(3) HYD 2 caution light illuminates
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