BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
GUIDELINE TOPICS SUMMARY OF GUIDELINES
-- SNOW, ICE OR FROST REMOVAL/PROTECTION METHOD UNHEATED WATER 34°F OR ABOVE TEMP STABLE OR RISING -ACCEPTABLE METHOD FOR REMOVING SNOW FROM SURFACES IN HANGAR OR OUTSIDE. ANTI-ICING FLUID APPLICATION OPTIONAL 27°F TO 34°F TEMP STABLE OR RISING- NOT PERMITTED BELOW 27°F - NOT PERMITTED
- HOT WATER DEICING - ACCEPTABLE AS ICE, SNOW - RECOMMENDED - NOT PERMITTED
(180-200°F AT TANK) OR FROST REMOVAL METHOD METHOD FOR ICE, SNOW
FOLLOWED BY ANTI-ICING IN HANGAR OR OUTSIDE. OR FROST REMOVAL IN
APPLICATION ANTI-ICING FLUID OPTIONAL HANGAR OR OUTSIDE
- DEICING (180-200°F AT TANK) - NOT RECOMMENDED (USE OF COSTLY FLUID ABOVE FREEZING NOT JUSTIFIED) - ACCEPTABLE METHOD FOR ICE, SNOW OR FROST REMOVAL OUTSIDE - RECOMMENDED METHOD FOR ICE, SNOW OR FROST REMOVAL OUTSIDE
- ANTI-ICING FLUID - NOT REQUIRED - APPLY IF HOT WATER METHOD USED - APPLY AS PROTECTION IF ICE, SNOW OR FROST CONDITION ANTICIPATED
- APPLY AS PROTECTION - REAPPLY AS
TO MINIMIZE ICE, SNOW OR FROST NECESSARY AFTER DEICING
ACCUMULATION
- REAPPLY AS
NECESSARY AFTER
DEICING
APU - MAY OPERATE WHEN DEICING BUT OBSERVE PRECAUTIONS.
WARNING: BECAUSE OF EXTREME DANGER TO PERSONNEL NEAR APU INLET AND EXHAUST WHEN APU IS OPERATING, DANGER ZONE DEFINED IN CHAPTER 10 MUST BE OBSERVED.
ENGINES - DO NOT OPERATE WHILE DEICING IF POSSIBLE.
- IF THE ENGINE MUST OPERATE WHILE DEICING, OBSERVE PRECAUTIONS.
WARNING: BECAUSE OF EXTREME DANGER TO PERSONNEL NEAR ENGINE INLET AND EXHAUST WHEN ENGINE IS OPERATING, DANGER ZONE DEFINED IN CHAPTER 10 MUST BE OBSERVED.
PRECAUTIONS - DO NOT RELEASE AIRPLANE FOR TAKEOFF WITH ICE, SNOW OR FROST ON CONTROL, WING OR HORIZONTAL TAIL SURFACES EXCEPT FOR A MAXIMUM OF 1/8-INCH FROST ON LOWER WING SURFACE BETWEEN SPARS.
-
FUSELAGE AND VERTICAL TAIL SURFACES SHOULD BE FREE FROM ICE AND SNOW. THIN HOAR FROST IS PERMISSIBLE ON THE UPPER FUSELAGE.
-
DO NOT SPRAY ANTI-ICING/DEICING FLUID DIRECTLY INTO ENGINE OR APU INLETS, EXHAUSTS, ENGINE THRUST REVERSERS, PROBE INLETS, SCOOPS, VENTS, DRAINS, ETC.
-
DO NOT SPRAY HOT FLUID DIRECTLY ON COLD WINDOWS.
-
DO NOT FORCE ICE OR SNOW INTO OPENINGS AROUND FLIGHT CONTROL SURFACES DURING REMOVAL PROCEDURE.
-
DO NOT CLOSE ANY DOOR UNTIL ALL ICE OR SNOW HAS BEEN REMOVED WITH DEICING FLUID.
- CLOSE CABIN AIR CONDITIONING PACK VALVES AND BLEED VALVES IF ENGINES OR APU IS RUNNING. OPERATING - CHECK ALL CONTROL SURFACE OPERATION BY CYCLING. GROUND OBSERVER SHOULD VERIFY
INSPECTION FULL TRAVEL. IF THERE IS REASON TO SUSPECT FROZEN SEALS OR OBSTRUCTIONS, OPERATE SURFACES MANUALLY BEFORE APPLYING POWER.
-
CHECK THAT PITOT AND STATIC OPENINGS ARE FREE OF OBSTRUCTION WITHIN 4 FEET.
-
CHECK THAT LANDING GEAR AND WHEEL WELL AREA ARE FREE FROM ICE, SNOW, AND SLUSH.
-
CHECK THAT ALL INLETS AND EXHAUSTS ARE UNOBSTRUCTED.
-
CHECK THAT ALL DRAINS ARE FREE FROM OBSTRUCTIONS.
-
CHECK THAT ANGLE OF AIRFLOW SENSORS ARE FREE OF ICE AND/OR SNOW AND THAT SENSORS MOVE FREELY.
500 Guidelines Summary: Ice, Snow or Frost Conditions
Feb 01/95 Figure 202 12-50-0
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BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
Horizontal Stabilizer Position 500
12-50-0Page 220 Figure 203 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Feb 20/93
500 Balance Panel and Probe Location
Feb 20/93 Figure 204 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 12-50-0 Page 221
