NoseGearSteeringInstallation
Figure401 (Sheet1of 2)
EFFECTIVITY:
040-999
PAGE
Jan 10/90 32-50-00
PIPER AIRCRAFT
PA-42-720 (Advanced Trainer)
MAINTENANCE MANUAL
A. Steering (continued)
Rudder
Pedal
Assembly
Right
Pedal
Pushrod
Nose
Gear
Steering
-Control Arm Pushrod
Nose
Gear
Steering
Tube
RudderControlCables
Compensating
Bellows RudderControlSector
Bulkhead
Sta. 57.00
NoseGear Steering Installation
Figure 401 (Sheet2 of 2)
EFFECTIVITY:
040-999 32-50-00 PAGE 3Jan 10/90
PIPERAIRCRAFT
PA-42-720(Advanced Trainer)
MAINTENANCE MANUAL
A. Steering (continued)
2. Removalof Nose Gear Steering Assembly (refer to 32-50-00 Figure 401) (continued)
(f) The outboard steering arm, located in the access area, is removed by disconnecting
torque tube, running up from the rudder control sector. Remove the through bolt attaching the arm to the bearing shaft. Note the number of AN960D-1616 to facilitate
bearingsupport washers installation.
WARNING: THEBUNGEE TUBE ASSEMBLY MUST BE HANDLED CAUTIOUSLY. IF FOUND TO BE DEFECTIVE OR DAMAGED IN ANY WAY, IT MUST BE REPLACEDWITH A NEW ASSEMBLY. UNDER NO CONDITION SHOULD THIS PART BE DISASSEMBLED. THERE ARE SPRINGS UNDER COMPRESSION LOCATEDINSIDE THE TUBE. THE LOCKING CLIPS MUST NOT BE REMOVED.
(g) Theinboard steering arm, located in the wheel well, is removed by disconnecting the bungee tube from the arm. Remove the through bolt attaching the arm to the bearing shaft. To facilitateinstallation,note how many AN960-1616L
washersare used.
(h)The bungee tube is attached to both the inboard steering arm and nose gear primary drive arm. The bungee tube is removed by reaching into the wheel well, disconnecting
the aft end of the tube to the inboard steering arm, pivoting the gear to the left, and disconnecting
the tube from the primary drive arm.
3. Installation of Nose Gear Steering Assembly (refer to 32-50-00 Figure 401)
WARNING: THE BUNGEE TUBE ASSEMBLY MUST BE HANDLED CAUTIOUSLY. IF FOUND TO BE DEFECTIVE OR DAMAGED IN ANY WAY, IT MUST BE REPLACED WITH A NEW ASSEMBLY. UNDER NO CONDITION SHOULD THIS PART BE DISASSEMBLED.THERE ARE SPRINGS UNDER COMPRESSION LOCATEDINSIDE THE TUBE. THE LOCKING CLIPS MUST NOT BE REMOVED.
(a) Installnose gear steering assemblyin reverse order of removal. To ensure nose gear is aligned properly, proceed as follows:
(1.) With a plumb bob, drop a point directly down from the tail skid and the center of the nose. (2.) Lay a chalk line between these two points. After laying a chalk line around the center of
thetire, align the tire centerline with the ground chalk line. (3.) Clamp rudder pedals in a neutral position. (4.) With at least three threads engagedin the rod ends, install steering assemblies.
EFFECTIVITY:
040-999
Jan 10/90 32
Jan10/9032-50-00
PIPERAIRCRAFT
PA-42-720(AdvancedTrainer)
MAINTENANCEMANUAL
A. Position and Warning
1. Description and Operation -Position and Warning
A squat switch on the landing gear and a dynamic pressure q sensor must operate this latch beforethe landing gearselector control can be moved upward. The landinggear control knob is in the shape of a wheel to differentiateit from the flap control, which has a knob in the shaft of an airfoil.
A differential pressure q sensor is installed in the copilot's pitot/static system which senses dynamicpressure(q). The sensor is set to actuate at 100 ± 4 KIAS on increasing airspeed and 100 plus 4 KIAS minus 10 KIAS on decreasing airspeed. Theq sensing system is provided as an alternate(backup)meansof controlling major circuits which are operated throughthe landing gear squatswitches;groundcooling fan solenoid, cabin pressure dumpsolenoid,ice protection selector switch,gear lock solenoidand high/low selectionfor the stall recognition systemlift detector heat.
2. Fault Isolation -Position and Warning
CHART 1
FAULT ISOLATION (POSITION AND WARNING) (Sheet 1 of 2)
Fault Cause Remedy
No red light on panel Circuit breaker out. Check circuit breaker. when gears are in
transit.
Indicatorlightburned out. Replaceindicator light.
Circuit wire broken. Checkwiring.
No green light on panel Circuit breaker out. Checkcircuitbreaker.
when gears are down.
Indicator light burned out. Replaceindicatorlight.
Lock switch defective Replaceand/ or adjust lock switch.
or out of adjustment. (refer to 32-30-00)
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