Transcript AIRCRAFT GROUND DEICING/ANTI

AIRCRAFT GROUND
DEICING/ANTI-ICING
Jeanne Cook - Bankair
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 of
the following requirements is met:
(1) A pre-takeoff contamination check, that has been
established 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.
(2) The certificate holder has an approved alternative
procedure and under that procedure the airplane is
determined to be free of frost, ice, or snow.
(3) The certificate holder has an approved deicing/anti-icing
program that complies with §121.629(c) of this chapter and
the takeoff complies with that program.
PRECONTAMINATION CHECK
OR
ALTERNATE PROCEDURE
5 MINUTES
FAA TYPE III Holdover Time Guideline
Table 3. FAA Guidelines for Holdover Times SAE Type III Fluid
Mixture 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 PRETAKEOFF CHECK
PROCEDURES.
Outside Air Temperature
Degrees
Celsius
-3 and
above
Degrees
Fahrenheit
27 and
above
Approximate Holdover Times Under Various Weather Conditions (hours: minutes)
Type III Fluid
Concentratio
n Neat
Fluid/Water
Snow/Snow Grains
Freezing
Fog
(Volume %/Volume %)
Activ
e
Frost
100/0
2:00
75/25
Freezing
Drizzle*
Light
Freezing
Rain
Rain on
Cold
Soaked
Wing**
Very Light
Light
Moderate
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
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
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
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
1:00
0:15 - 0:30
0:25 - 0:30
0:10 - 0:25
0:07 - 0:10
0:09 - 0:12
0:06 - 0:09
50/50
100/0
below -3
to -10
below 27
to 21
75/25
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 III fluid may be used below -10C (14F), provided the freezing point of the fluid is at least 7C (13F) below OAT and aerodynamic acceptance criteria are met.
Consider the use of SAE Type I when Type III fluid 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 0˚C (32˚ F) only
+ Snow pellets, ice pellets, heavy snow, moderate and heavy freezing rain, and hail.
Other‡
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.
Looking at the Active Frost or the Freezing Fog,
you can easily determine the time benefit of
being able to use a HOT
Our goal is to have an alternate
procedure that allows the PIC to be the
person trained in deicing an aircraft
RACCA has been working with the FAA for
two years regarding this issue. The FAA is
working closely with us in looking at sample
programs. The FAA states that we should
have an approved alternate program by
this winter season.
www.faa.gov/other_visit/aviation_industry/airline_operators/airline_safety/media/FAAHOT2006-2007.doc - 2006-11-13