COLD WX OPS Flashcards
ICIING CONDS EXIST WHEN:
OAT ON THE GND
OR TAT IN FLT 10 DEG OR BELOW AND ANY OF THE FOLLOWING EXIST:
VISIBLE MOISTURE ( CLOUD/ FOG WITH VIS OF ONE STATUTE MILE 1600 M OR LESS/ RAIN SNOW SLEET/ ICE CRYSTALS AND SO ON IS PRESENT/ OR
ICE SNOW SLUSH OR STANDING WATER IS PRESENT ON RAMPS TAXIWAYS OR RUNWAYS
CAUTION
USING EAI OR WAI
DO NOT USE EAI WHEN OAT ON GND >10 DEG
DO NOT USE EAI OR WAI WHEN DISPLAYED TAT IN FLT IS > 10 DEG
PRELIM PREFLT PROC
IF TAXI IN PREVIOUS FLT OCCURRED IN VISIBLE MOISTURE (FOG WITH VIS OF ONE STATUTE MILE 1600 M OR LESS/ RAIN SNOW SLEET ICE CRYSTALS IN ICIING CONDS AND TEMP STAYED 3 DEG OR BELOW THE TAXI IN TIME FROM PREVIOUS FLT IN AIRPLANE LOGBOOK MUST BE INCL IN TOTAL TAXI TIME.
IF THE ENGINE IS CONSIDERED FREE OF ICE BEFORE ENG START ONLY TAXI OUT TIME SHOULD BE INCL TOTAL TAXI TIME
ENG CONSIDERED FREE OF ICE BEFORE ENG START IF:
ENG MANUALLY DEICED
OR
ENG VISUALLY INSPECTED AS PER AMM
EXTERIOR INSPECTION
TAKEOFF WITH LIGHT COATINGS OF FROST UP TO 1/8 INCH 3 MM IN THICKNESS ON LOWER WING SURFACES DUE TO COLD FUEL IS ALLOWABLE/ HOWEVER/ ALL LEADING EDGE DEVICES/ ALL CONTROL SURFACES AND UPPER WING SURFACES MUST BE FREE OF SNOW ICE AND FROST
ALL EXTERNAL OUTLETS FREE OF SNOW ICE AND FROST
APU AIR INLETS
APU INLET DOOR MUST BE FREE OF SNOW AND ICE BEFORE APU START
PREFLT FO
HYDRAULIC PANEL
HYD PANEL
IF ALL PUMP SEL ON AND APU RUNNING MAINT MAY HAVE PERFORMED MAINT PROC FOR COLD WX HYD SYS WARMUP
LEAVE ELEC PUMP SEL ON AND APU RUNNING
DURING BEFORE START PROC SEL AUTO
IF FUEL TEMP < -17 DEG AND IF ELEC HYD PUMP SEL ARE SET TO AUTO OR OFF FOR > 10 MINS PRIOR TO ENG HYD PUMP OPERATION NOTIFY MAINT
ENGINE START PROC
NORMAL PROC WITH FOLLOWING CONSIDERATIONS:
OIL PRESS MAY BE SLOW TO RISE
INITIAL OIL PRESS RISE MAY BE HIGHER THAN NORMAL
ADDITIONAL WARMUP TIME MAY BE NEEDED TO ALLOW OIL TEMP TO REACH NORMAL RANGE
DISPLAYS MAY REQUIRE ADDITIONAL WARMUP TIME BEFORE DISPLAYED ENG INDICATIONS ACCURATELY SHOW CHANGING VALUES. DISPLAYS MAY APPEAR LESS BRIGHT THAN NORMAL
EAI ON GROUND
ON AFTER START AS PART OF AFTER START FLOW
ON FOR ALL GROUND OPS WHEN ICIING CONDS EXIST EXCEPT WHEN TEMP LESS THAN -40 DEG C
DO NOT USE EAI > 10 DEG
CONFIRM EAI SHOWN IF EAI INDICATION BLANK/ CONFIRM AREA BEHIND ACFT CLEAR THEN INCREASE THRUST UNTIL EAI SHOWS (NO MORE THAN 10% ABOVE IDLE)
BEFORE TAXI PROC
IF SNOW OR ICE ON WING CONSIDER DELAYING FLT CONTROL CHECK UNTIL AFTER DEICE ANTICIING
IF TAXI ROUTE THROUGH ICE SNOW SLUSH OR STANDING WATER IN LOW TEMPS OR IF PRECIP FALLING WITH TEMPS BELOW FREEZING TAXI WITH FLAPS UP
TAXIING WITH THE FLAPS EXTENDED SUBJECTS THE FLAPS AND FLAP DRIVES TO CONTAMINATION. LE DEVICES ARE ALSO SUSCEPTIBLE TO SLUSH ACCUMULATIONS
TAXI OUT
TAXI REDUCED SPEED
SMALL TILLER INPUTS
DIFFERENTIAL THRUST MAY ASSIST DURING TURNS
PRECAUTIONS MUST BE TAKEN FOR JET BLAST UP TO 200 M BEHIND THE ACFT/ SNOW AND ICE AT THE EDGE OF THE TAXIWAY THAT CAN BE INGESTED BY THE ENGINES/ SLIPPERY TAXI SURFACES AND AIRPORT NOISE RESTRICTIONS
TAXI OUT
ENGINE RUNUP
OAT 3 DEG OR LESS
AND
VISIBILE MOISTURE (FOG WITH VIS LESS THAN 1600 M RAIN SNOW SLEET ICE CRYSTALS ETC
DO FOLLOWING PROC
CHECK BEHIND ACFT CLEAR PF
ENGINE VIBRATION LEVELS MAY BE ABOVE NORMAL OPERATING RANGE DURING ICE SHEDDING
MIN 40 % N1 FOR AT LEAST 5 SECS EVERY 60 MINS
IF HIGH ENG VIBRATIONS OCCUR A RUNUP TO 50 % N1 MAY BE DONE
IF TAKEOFF NOT COMPLETED WITHIN 120 MINS TOTAL TAXI TIME MANUALLY DEICE ENGINES BEFORE TAKEOFF
DEICIING ANTIICIING PROC
TESTING OF UNDILUTED FLUIDS HAS SHOWN THAT SOME IF THE FLUID REMAINS ON THE WING DURING TAKEOFF ROTATION AND INITIAL CLIMB
RESIDUAL FLUID CAUSES A TEMPORARY DECREASE IN LIFT AND INCREASE IN DRAG HOWEVER EFFECTS ARE TEMPORARY. USE NORMAL TAKEOFF ROTATION RATE
IF DEICE ANTIICE NEEDED READ AND FOLLOW SUPP PROC
TAKEOFF PROC
WHEN EAI REQD AND OAT 3 DEG OR BELOW NEED STATIC RUNUP
WITHIN 5 MINS OF OR IN CONJUNCTION WITH TAKEOFF:
MIN 40 % N1 up to 55 % N1 MAX
5 SECS MINIMUM
IF HIGH FAN VIBRATIONS PERSIST INCREASE THRUST TO MIN 50 % N1 up to 55 % N1 MAX AND MAINTAIN THAT THRUST UNTIL VIB BELOW 4 UNITS BEFORE PROCEEDING WITH TAKEOFF
CONFIRM STABLE OPERATION PRIOR TO FINAL ADVANCE TO TAKEOFF THRUST
NOTE ENG VIB MAY INDICATE MAX DISPLAY PRIOR TO SHEDDING ICE HOWEVER THIS WILL HAVE NO ADVERSE EFFECT ON THE ENGINE
AFTER RUNUP NO NEED TO REDUCE THRUST BEFORE BRAKE RELEASE FOR TAKEOFF AT ANY GROSS WEIGHT OR CENTRE OF GRAVITY
EAI OPS INFLT
EAI MUST BE AUTO OR ON WHEN ICIING CONDS EXIST OR ANTICIPATED EXCEPT WHEN TEMP BELOW -40 DEG C SAT
DO NOT USE EAI WHEN TAT > 10 DEG
MANUAL USE OF EAI
WHEN MANUALLY USING ACTIVATE BEFORE ENTERING ICIING CONDS
WHEN SEL EAI ON CHECK EAI DISPLAYED NEAR N1
IF ICIING DETECTION AVAIL POSITION TO AUTO IF INOP SEL OFF WHEN EAI NO LONGER REQD
FAN ICE REMOVAL
CAUTION AVOID PROLONGED OPERATION IN MODERATE TO SEVERE ICIING CONDS
IF MOD TO SEV ICIING CONDS ENCOUNTERED:
NOTE OPERATION IN ICIING CONDS MAY RESULT IN ENG VIB INDICATIONS ABOVE NORMAL OPERATING RANGE DURING ICE SHEDDING
IF N1 AT OR BELOW 70 % N1 WHEN FAN ICIING IS SUSPECTED DUE TO HIGH ENG VIB THE FAN BLADES MUST BE CLEARED OF ICE
EVERY 15 MINS ON BOTH ENGINES ONE ENGINE AT A TIME:
INCREASE MIN 70 % N1 FOR 10-30 SECS
WAI IN FLT
ICE ACCUMULATION ON FLT DECK WINDOW FRAMES/ WINDSHIELD CENTER POST/ OR WINDSHIELD WIPER ARM OR SIDE WINDOWS MAY BE USED AS AN INDICATION OF STRUCTURAL ICIING CONDS AND NEED FOR WAI
WAI
HOW DOES IT OPERATE
WAI MAINLY USED TO PREVENT ICIING IN FLT
PRIMARY METHOD
USE THE AUTO ICE DETECTION SYS TO CONTROL WAI OPERATION AUTO THROUGHOUT ENTIRE FLT ENVELOPE.
THIS AUTO MODE USES COMBINATION OF SYMMETRIC SLAT ANTI ICE AND DE ICE FUNCTIONS TO PROVIDE CLEANEST AIRFOIL SURFACE/ THE LEAST POSS RUNBACK ICE FORMATION/ AND LEAST THRUST AND FUEL PENALTY
SECONDARY MODE
SEL WAI ON
DO NOT USE WAI TAT > 10 DEG C
MANUAL USE WAI
WAI ON CHECK WAI SHOWN EICAS
WING ANTI ICE OFF ADVISORY MSG WHEN SEL OFF
COLD TEMP ALT CORRECTIONS
EXTREMELY LOW TEMPS CREATE SIGNIFICANT ALTIMETRY ERRORS AND GREATER POTENTIAL FOR REDUCED TERR CLEARANCE
WHEN TEMP < ISA TRUE ALT LOWER THAN INDICATED ALT
ALTIMETRY ERRORS SIGNIFICANTLY
LARGER WHEN SURFACE TEMP APPROACHES -30 DEG C OR COLDER AND BECOME LARGER WITH INCREASING HEIGHT ABOVE THE ALTIMETER REF SOURCE
COLD WX CORRECTIONS
WHICH ALTS
ALL PUBLISHED MIN DEP ENROUTE AND APPROACH ALTS
ADVISE ATC OF CORRECTIONS
MDA DA SETTINGS SHOULD BE AT CORRECTED MIN ALTS FOR APP
WHEN DO COLD WX CORRECTIONS NOT NEED TO BE APPLIED
WHILE UNDER ATC RADAR VECTORS
AT ATC ASSIGNED FL
WHEN REPORTED AIRPORT TEMP > 0 DEG C
TAXI
AFTER LANDING
TAXI REDUCED SPEED
SMALL TILLER INPUTS
DIFFERENTIAL THRUST MAY ASSIST DURING TURNS
PRECAUTIONS MUST BE TAKEN FOR JET BLAST UP TO 200 M BEHIND THE ACFT/ SNOW AND ICE AT THE EDGE OF THE TAXIWAY THAT CAN BE INGESTED BY THE ENGINES/ SLIPPERY TAXI SURFACES AND AIRPORT NOISE RESTRICTIONS
AFTER LANDING PROC
IN ORDER TO DETECTED AN UNANNUNCIATED FAILURE OF THE SLAT DRIVE SYS THE FLT CREW MUST NOTIFY MAINT THAT CHECK SLAT DRIVE SYS REQD IF:
OAT AT DEST APT 50 DEG F 10 DEG C OR BELOW AND OPERATING ON GND WITH ICE SNOW SLUSH OR STANDING WATER
OR
AN ACCUMULATION OF AIRFRAME ICE OBSERVED OR SUSPECTED FOR EXAMPLE WAI ACTIVE DURING APP
POSTFLT CHECK BY MAINT TO ENSURE OUTBOARD SLAT ACTUATORS ARE FUNCTIONING NORMALLY
AFTER LANDING
EAI USE
ON FOR ALO GROUND OPS WHEN ICIING CONDS EXIST EXCEPT WHEN TEMP BELOW -40 DEG C
AFTER LANDING
ENGINE RUNUP
WHEN BOTH EXIST:
OAT 3 DEG C OR BELOW
AND
VISIBILE MOISTURE (FOG WITH VIS LESS THAN ONE STATUTE MILE 1600 M OR LESS RAIN SNOW SLEET ICE CRYSTALS ETC
CHECK BEHIND ACFT CLEAR
MIN 40 % N1 FOR AT LEAST 5 SECS EVERY 60 MINS
IF HIGH ENG VIB MAY NEED UP TO 50 % N1
AFTER LANDING
TAXI IN TIME
IF ENG RUNUP REQD BUT NOT DONE
RECORD OAT 3 DEG OR LESS
AND
VISIBLE MOISTURE
RECORD TAXI TIME IN THOSE CONDS IN E LOG
SECURE PROC
READ AND DO SUPP PROC
IF FLAPS LEFT EXT MAKE ENTRY IN TECH LOG
