TM 1-1510-225-10 8-28 g.    Landing.    Extreme  care  must  be  exercised when  landing  on  ice  or  slippery  runways.    Excessive use   of   either   brakes   or   power   may   result   in   an uncontrollable  skid.    Ice  accumulation  on  the  aircraft will   result   in   higher   stalling   airspeeds   due   to   the change  in  aerodynamic  characteristics  and  increased weight of the aircraft due to ice buildup.  Approach and landing airspeeds must be increased accordingly. 8-60.  ICING (SEVERE). a.    The   following   weather   conditions   may   be conducive to severe in-flight icing: 1.  Visible  rain  at  temperatures  below  0 C ambient air temperature. 2.  Droplets that splash or splatter on impact at  temperatures  below  0 C  ambient  air temperature. b.    The following procedures for exiting a severe icing  environment  are  applicable  to  all  flight  phases from takeoff to landing: 1.  Monitor    the    ambient    air    temperature. While severe icing may form at temperatures as cold as –18 C, increased vigilance   is   warranted   at   temperatures around    freezing    with    visible    moisture present. 2.  Upon  observing  the  visual  cues  specified in the limitations section of this manual for the identification of severe icing conditions, Paragraph 5-35, accomplish the following: a.  Immediately   request   priority   handling from   air   traffic   control   to   facilitate   a route  or  an  altitude  change  to  exit  the severe icing conditions in order to avoid extended  exposure  to  flight  conditions more  severe  than  those  for  which  the aircraft has been certified. b.  Avoid abrupt and excessive maneuvering     that     may     exacerbate control difficulties. c.   Do not engage the autopilot. d.  If  the  autopilot  is  engaged,  hold  the control wheel firmly and disengage the autopilot. e.  If an unusual roll response or uncommanded roll control movement is observed reduce the angle-of-attack. f.    Do  not  extend  flaps  during  extended operation in icing conditions. Operations   with   flaps   extended   can result in a reduced angle-of-attack, with the   possibility   of   ice   forming   on   the upper  surface  further  aft  on  the  wing than    normal,    possibly    aft    of     the protected area. g.  If the flaps are extended, do not retract them until the airframe is clear of ice. h.  Report  these  weather  conditions  to  air traffic control. Section VI.  CREW DUTIES. H8-61.  CREW/PASSENGER BRIEFING. The     following     guide     should     be     used     in accomplishing the required passenger briefings.  Items that   do   not   pertain   to   a   specific   mission   may   be omitted. 1.  Crew Introduction. 2.  Equipment. a.  Personnel to include ID tags. b.  Professional (medical equipment, etc.). c.   Survival. 3.  Flight Data. a.  Route. b.  Altitude. c.   Time en route. d.  Weather. 4.  Normal Procedures. a.  Entry and exit of aircraft. b.  Seating and seat position. c.   Seat belts. d.  Movement in aircraft.