AIRCRAFT
DA 42 NG AMM
Hydraulic Power
Trouble
Possible Cause
Repaired Items/References
Doc # 7.02.15
Rev. 4
29-10-00
Page 105
15 Mar 2018
Charging time of the
completely empty accumulator
is too long (more than 25 sec).
Dump valve is not fully closed
(high re-pump cycles).
Close dump valve. Tighten
hexagon socket with 6 - 10 Nm
(4.4 - 7.4 lbf.ft.). Tighten
counter nut with 8 Nm
(5.9 lbf.ft.).
See Figure 1.
Pre-fill pressure in hydraulic
accumulator too low.
Check accumulator pressure.
Refer to Section 29-10.
Charge accumulator to
appropriate pressure.
Pressure limitation valve is not
working properly. Wrong
system pressure.
Check pressure limitation
valve. Refer to Section 29-10.
Replace pressure limitation
valve.
Leakage of the emergency
extension block. Occurs only
when retracting the landing
gear.
Check Bowden cables.
Replace the emergency
extension block. Refer to
Section 29-10.
Re-pump time of the pump is
too short (less than 2 sec).
Pre-fill pressure in hydraulic
accumulator too low.
Check accumulator pressure.
Refer to Section 29-10.
Charge accumulator to
appropriate pressure.
Pump pressure switch is
damaged.
Check switching points (refer to
pump pressure switch
operation test).
Replace pump pressure switch.
Refer to Section 29 -10.
Summary of Contents for DA 42 NG
Page 933: ...AIRCRAFT DA 42 NG AMM Fuel Doc 7 02 15 Rev 4 28 TITLE Page 1 15 Mar 2018 CHAPTER 28 FUEL ...
Page 1459: ...AIRCRAFT DA 42 NG AMM Lights Doc 7 02 15 Rev 4 33 TITLE Page 1 15 Mar 2018 CHAPTER 33 LIGHTS ...
Page 1711: ...AIRCRAFT DA 42 NG AMM Doors Doc 7 02 15 Rev 4 52 TITLE Page 1 15 Mar 2018 CHAPTER 52 DOORS ...
Page 1853: ...AIRCRAFT DA 42 NG AMM Wings Doc 7 02 15 Rev 4 57 TITLE Page 1 15 Mar 2018 CHAPTER 57 WINGS ...
Page 2071: ...AIRCRAFT DA 42 NG AMM Engine Doc 7 02 15 Rev 4 72 TITLE Page 1 15 Mar 2018 CHAPTER 72 ENGINE ...
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