aircraft ground deicing ppt

8/13/2019 Aircraft Ground Deicing PPT

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AIRCRAFT GROUND

DEICING/ANTI-ICING

Jeanne Cook - Bankair


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135.227

(b) No certificate holder may authorize an airplane to take off

and no pilot may take off an airplane any time conditions

are such that frost, ice, or snow may reasonably be expected

to adhere to the airplane unless the pilot has completed all

applicable training as required by 135.341 and unless one ofthe following requirements is met:


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(1) A pre-takeoff contamination check, that has beenestablished by the certificate holder and approved by

the Administrator for the specific airplane type, has

been completed within 5 minutes prior to beginning

takeoff. A pre-takeoff contamination check is a

check to make sure the wings and control surfaces

are free of frost, ice, or snow.


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(2) The certificate holder has an approved alternativeprocedure and under that procedure the airplane is

determined to be free of frost, ice, or snow.


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(3) The certificate holder has an approved deicing/anti-icingprogram that complies with 121.629(c) of this chapter and

the takeoff complies with that program.


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PRECONTAMINATION CHECKOR

ALTERNATE PROCEDURE


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5 MINUTES


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FAA TYPE III Holdover Time Guideline

Table 3. FAA Guidelines for Holdover Times SAE Type III FluidMixture as a Function of Weather Conditions and OUTSIDE AIR

TEMPERATURE.

CAUTION: THIS TABLE IS FOR DEPARTURE

PLANNING ONLY AND SHOULD BE USED IN

CONJUNCTION WITH PRETAKEOFFCHECK

PROCEDURES.


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Outside Air Temperature Approximate Holdover Times Under Various Weather Conditions (hours: minutes)

Degrees

Celsius

Degrees

Fahrenheit

Type III Fluid

Concentratio

n Neat

Fluid/Water(Volume%/Volume %)

Activ

eFrost

Freezing

Fog

Snow/Snow Grains

Freezing

Drizzle*

Light

Freezing

Rain

Rain on

Cold

SoakedWing**

OtherVery Light Light Moderate

-3 and

above

27 and

above

100/0 2:00 0:20 - 0:40 0:35 - 0:40 0:20 - 0:35 0:10 - 0:20 0:10 - 0:20 0:08 - 0:10 0:06 - 0:20

75/25 1:00 0:15 - 0:30 0:25 - 0:35 0:15 - 0:25 0:08 - 0:15 0:08 - 0:15 0:06 - 0:10 0:02 - 0.10

50/50

0:30 0:10 - 0:20 0:15 - 0:20 0:08 - 0:15 0:04 - 0:08 0:05 - 0:09 0:04 - 0:06

below -3

to -10

below 27

to 21

100/0 2:00 0:20 - 0: 40 0:30 - 0:35 0:15 - 0:30 0:09 - 0:15 0:10 - 0:20 0:08 - 0:10

75/251:00 0:15 - 0:30 0:25 - 0:30 0:10 - 0:25 0:07 - 0:10 0:09 - 0:12 0:06 - 0:09

below

-10

below

14

100/0

2:00 0:20 - 0:40 0:30 - 0:35 0:15 - 0:30 0:08 - 0:15

CAUTION:

No holdover time

guidelines exist

SAE Type IIIfluid may be used below -10C (14F), provided the freezing point of the fluid is at least 7C (13F) below OAT and aerodynamic acceptance criteria are met.

Consider the use of SAE Type Iwhen Type IIIfluid cannot be used.

THE RESPONSIBILITY FOR THE APPLICATION OF THESE DATA REMAINS WITH THE USER.

*Use light freezing rain holdover times if positive identification of freezing drizzle is not possible

**This column is for use at temperatures above 0C (32 F) only

+ Snow pellets, ice pellets, heavy snow, moderate and heavy freezing rain, and hail.


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CAUTIONS:THE TIME OF PROTECTION WILL BE SHORTENED IN

HEAVY WEATHER CONDITIONS. HEAVY PRECIPITATION

RATES OR HIGH MOISTURE CONTENT, HIGH WIND

VELOCITY, OR JET BLAST WILL REDUCE HOLDOVER TIME

BELOW THE LOWEST TIME STATED IN THE

RANGE. HOLDOVER TIME MAY BE REDUCED WHEN

AIRCRAFT SKIN TEMPERATURE IS LOWER THAN OAT.SAE TYPE III FLUID USED DURING GROUND

DEICING/ANTI-ICING IS NOT INTENDED FOR - AND DOES

NOT PROVIDE - PROTECTION DURING FLIGHT.


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Looking at the Active Frost or the Freezing Fog,

you can easily determine the time benefit of

being able to use a HOT


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Our goal is to have an alternate

procedure that allows the PIC to be the

person trained in deicing an aircraft


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RACCA has been working with the FAA for

two years regarding this issue. The FAA isworking closely with us in looking at sample

programs. The FAA states that we should

have an approved alternate program bythis winter season.


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www.faa.gov/other_visit/aviation_industry/airline_operators/airline_safety/media/FAAHOT2006-2007.doc - 2006-11-13

aircraft ground deicing ppt

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