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PSP 604-15
HYDRAULIC SYSTEM
MALFUNCTIONS
HYD 2 LO PRESS and HYD 3 LO PRESS (Cont’d)
NOTE
1. Unless it is possible to restore use of No. 2
hydraulic system, landing gear extension
relies upon gear free fall after use of gear
manual extension control.
2. A sideslip, for each side, must be performed
to achieve MLG down-lock. It may be
required to increase airspeed to ensure
down-lock during sideslip.
(10) GPWS/FLAP OVRD
(if installed) ................................................................ OVRD
(11) Landing flaps .................................................................. 20°
(12) Approach speed ...................................................VREF + 14
minimum.
NOTE
The above double hydraulic system failure has an
extremely remote probability. If it occurs, maximum
use of reverse thrust must be used upon landing.
(13) Actual landing distance...................................... INCREASE
by a factor of 3.50 (250%).
CAUTION
Extreme caution is required during
braking to avoid tire damage.
Maximize use of reverse thrust.
Upon landing:
(14) Both engines.............................................................APPLY
maximum reverse thrust.
(15) Brakes ......................................................................APPLY
light to moderate braking until safe taxi speed is
maintained.
(16) Brake pressure ....................................................MONITOR
Approximately six (6) full brake applications are
possible using brake accumulator pressure.
NOTE
INBD and OUTBD BRAKE PRESS caution messages
come on at less than 1,015 psi.
− END −
No
(4) No further action required.
END
ABNORM 10-11
REV 74, Nov 07/08
QUICK REFERENCE HANDBOOK
PSP 604-15
HYDRAULIC SYSTEM
MALFUNCTIONS
HYD 1 LO PRESS and HYD 3 LO PRESS
HYD 1 LO PRESS and HYD 3 LO PRESS
(1) Airspeed ....................................................................... 200 KIAS
maximum.
(2) HYDRAULIC pumps (all)........................................................ ON
(3) Hydraulic pressure and fluid
quantity............................................................................CHECK
No. 1 and No. 3 quantity readouts are less than 5%, or pressure
is less than 1,800 psi, or pressure is rapidly decreasing:
Yes
(4) HYDRAULIC pumps 1B, 3A
and 3B .......................................................................... OFF
(5) Inoperative systems (see
below) .................................................................... REVIEW
• Left aileron and left elevator inoperative;
• Left and right ground spoilers inoperative;
• Normal landing gear extension and retraction
inoperative;
• Inboard brakes inoperative (when system 3
accumulator pressure is depleted);
• Nose door will remain open;
• Nose wheel steering inoperative (may have nose wheel
shimmy);
• Parking brake inoperative.
(6) NOSE STEER .............................................................. OFF
(7) ANTI-SKID..................................................LEAVE ARMED
(8) Land at the nearest suitable airport.
NOTE
1. Flight path control is limited with No. 1 and
No. 3 hydraulic systems failed.
2. Select the longest runway available with
minimal crosswind and turbulence.
3. Rudder control is adequate for normal flight
and should be used in coordination with
aileron during turns.
(9) Landing Gear Manual
Extension procedure.....................................ACCOMPLISH
(See Page ABNORM 13–9)
Prior to landing:
(10) GPWS/FLAP OVRD
(if installed) ................................................................ OVRD
(11) Landing flaps .................................................................. 20°
(12) Approach speed ...................................................VREF + 14
minimum.
ABNORM 10-12
REV 74, Nov 07/08
▼
QUICK REFERENCE HANDBOOK
PSP 604-15
HYDRAULIC SYSTEM
MALFUNCTIONS
HYD 1 LO PRESS and HYD 3 LO PRESS (Cont’d)
(13) Actual landing distance...................................... INCREASE
as applicable by factor given below:
WITHOUT THRUST
REVERSERS
WITH THRUST
REVERSERS
2.40 (140%) 1.90 (90%)
NOTE
Maximize use of reverse thrust.
− END −
No
(4) No further action required.
END
ABNORM 10-13
REV 74, Nov 07/08
QUICK REFERENCE HANDBOOK
PSP 604-15
HYDRAULIC SYSTEM
MALFUNCTIONS
　
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