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SYSTEM OPERATION 

Flight control lock 

The flight-control lock should be engaged during taxiing and parking. After setting the flight-
control lock, move the control column slightly forward and bring the ailerons and rudder to 
the neutral position; check the flight controls are locked. When releasing the lock, be aware 
of flight control movement due to wind. The PF should keep his feet on the rudder bar while 
the PNF should hold the control wheel. 
 

CAUTION: 

Applicable for aircraft equipped with LSAS. If the flight control lock is engaged 
while the flaps are traveling the system will see this as a wrong input during 
the test phase of the LSAS, this might cause a non reset-able FAULT of the 
LSAS. 

 
 

Flaps 

Normal operation 

The flaps are hydraulically operated and the flap position is controlled by a flap selector. 
Operating time from up (0) to 35 or reverse is approximately 15 seconds. 
 

Alternate operation 

The flaps are electrically operated and controlled by the alternate flap control switch. 
Alternate flap operation inhibits normal flap selection. To avoid nuisance alerts select the 
normal flap selector to the indicated flap position. Operating time from up (0) to 35 or reverse 
is approximately 180 seconds. 
 

Fokker 50 - Landing Gear & Flaps

Page 18

Summary of Contents for Fokker 50

Page 1: ... from the trim control panel on the pedestal Elevator The elevators are operated manually from the captain s and first officer s control column Pitch trim is obtained by an elevator trim tab at the RH elevator The trim tab is operated by trim wheels on both sides of the pedestal A position indicator near each control wheel shows the trim setting Augment pitch attitude stability There are two pitch...

Page 2: ...ll freeze in its last position The system can be switched OFF by depressing the STAB AUG pushbutton With the DEGRADED or FAULT lights illuminated or the system switched OFF the elevator control forces during manual flight may be slightly higher or lower than normal depending on flight phase Some system input failures power lever and flap positions detected in flight will result in a system failure...

Page 3: ...Controls and indicators Controls and indicators Type I Fokker 50 Landing Gear Flaps Page 3 ...

Page 4: ...Controls and indicators Type II Fokker 50 Landing Gear Flaps Page 4 ...

Page 5: ...Controls and indicators Type I Fokker 50 Landing Gear Flaps Page 5 ...

Page 6: ...Controls and indicators Type II Fokker 50 Landing Gear Flaps Page 6 ...

Page 7: ...Fokker 50 Landing Gear Flaps Page 7 ...

Page 8: ...Fokker 50 Landing Gear Flaps Page 8 ...

Page 9: ...Fokker 50 Landing Gear Flaps Page 9 ...

Page 10: ...URAL MWL MCL CAP LOCAL CONDITION S LEVEL CAUTION FAULT AUTO EL FEEL CTL LONGITUDINAL STABILITY AUGMENTATION SYSTEM FAILURE 2 CAUTION FAULT STAB AUG LONGITUDINAL STABILITY AUGMENTATION SYSTEM FAILURE 1 AURAL MWL MCL CAP LOCAL CONDITION S LEVEL DEGRADED Fokker 50 Landing Gear Flaps Page 10 ...

Page 11: ... alert is inhibited during the period when the flaps are in transit Alternate operation Adjacent to the flap selector is an alternate flap control switch that operates the flap drive unit electrically The travel range is the same as in the hydraulic mode however the flaps extend at a slower rate After alternate operation no hydraulic operation can be made before the system is reset Reset is obtain...

Page 12: ...Functional diagram Fokker 50 Landing Gear Flaps Page 12 ...

Page 13: ...Controls and indicators Fokker 50 Landing Gear Flaps Page 13 ...

Page 14: ...Alerts FLAP DISAGREMENT 2 AURAL MWL MCL CAP LOCAL CONDITION S LEVEL CAUTION FLAP FLAP ASYMMETRY 2 CAUTION FLAP ASYM Fokker 50 Landing Gear Flaps Page 14 ...

Page 15: ...the engine rating panel See OM Part B section POWER PLANT Propeller autofeather system not armed See OM Part B section POWER PLANT NOTE The alerts cannot be cancelled by depressing MWL With the aircraft on the ground and either power lever not in TO position the take off configuration can be tested by depressing the TO CONFIG button at the test panel for at least 2 seconds The TO CONF light at the...

Page 16: ...Controls and indicators Fokker 50 Landing Gear Flaps Page 16 ...

Page 17: ...Alerts AIRCRAFT NOT IN TAKE OFF CONFIGURATION 3 AURAL MWL MCL CAP LOCAL CONDITION S LEVEL WARNING TO CONF Fokker 50 Landing Gear Flaps Page 17 ...

Page 18: ...ock is engaged while the flaps are traveling the system will see this as a wrong input during the test phase of the LSAS this might cause a non reset able FAULT of the LSAS Flaps Normal operation The flaps are hydraulically operated and the flap position is controlled by a flap selector Operating time from up 0 to 35 or reverse is approximately 15 seconds Alternate operation The flaps are electric...

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