Yak 18T Flight Operations Manual
Page 55 of 82
Disclaimer: This manual is to be used as a reference only, it is based on translated Yak 18T Flight Operations
Manuals and has not been approved by the Yakovlev Design Bureau or any other authority.
Section 10 - Landing
10.1. Descent and Landing Preparation
1. Perform a long descent in the range of operating altitudes with wheels down (flap is
retracted) or with the flap extended (wheels-up) at the engine conditions –
• Set the propeller to FINE PITCH, Pk = 300-340mm of Hg with preliminary heating of
the cylinder head temperature not below 170°C, aircraft IAS must be 160-170km/h.
Cylinder head temperature must be kept within 160°C-180°C limits by changing the
boost or opening the gills, it is determined using the indicator. When the long-term
descent is terminated, retract the undercarriage (flap) and fly according to the
remaining flying mission
2. Approaching the airfield, check air pressure in the main and emergency networks of the
pneumatic system (pressure must be 40-50 kgf/cm²), establish two-way radio
communication with ATC and on receiving clearance to descend at the airspeed indicator
reading of 170-180km/h, join circuit traffic at the initial approach altitude
3. Extend the undercarriage while downwind or during base to final at an indicated airspeed
not exceeding 200km/h. To extend the undercarriage, proceed as follows –
• MOVE the undercarriage lever latch to the left
• SHIFT the undercarriage lever from the NEUTRAL position to RETRACT to create
counter-pressure
• SHIFT the undercarriage lever from the RETRACT position to EXTEND not
retarding it to the neutral position
• CHECK the undercarriage extension by the indicator lights and mechanical indicators
(three green lights of the extended undercarriage position must be on, red lights will
extinguish and mechanical indicators on the wings and cowling will be out
completely)
• LOCK the undercarriage lever with the help of the latch by shifting it to the right
Leave the undercarriage lever in the extend position till the aircraft taxiing in for landing and
the engine shutdown.
10.2. Planning the approach
1. After undercarriage extension, maintain the indicated flying airspeed of 170-180km/h,
check air pressure in the main pneumatic system and in case there is no pressure,
change to the emergency system. Perform the turn onto base leg at horizontal level
flight conditions with an IAS of 180km/h
2. After the turn onto base leg prior to the glide approach, check the engine temperature (in
winter time the cylinder heads temperature cannot be less than 140°C), decrease the
propeller pitch by shifting the propeller pitch lever fully forward and from the turn
indicator reading make sure that the propeller pitch has been decreased completely
WARNING
Time of the engine continuous operation at rpm equal to 101% should not exceed 1 minute
3. Perform the base-leg to final turn at an IAS of at least 170km/h. Rollout of the turn must
be terminated at a level of at least 150m (500ft)
To Next Page
Loading...