Airworthiness Directive 2003-12-06
This amendment adopts a new airworthiness directive (AD) that is applicable to certain
Bombardier Model CL-600-2C10 (Regional Jet Series 700 & 701) series airplanes. This action
requires a revision to the Airplane Flight Manual (AFM) to prohibit operations into known or
forecast icing conditions under certain conditions. This action also requires an inspection to
detect damage of the wing anti-ice (WAI) ducts to determine if the external shrouds of the ducts
are open or cracked, and replacement of any damaged duct with a new duct or a duct with the
same part number. This action also provides for an optional terminating action for the AFM
revision and inspection. This action is necessary to prevent the WAI ducts from collapsing,
cracking, or rupturing, which could cause leakage of hot air in the under-floor pressurized area of
the fuselage when the anti-ice system is turned on. Such leakage of hot air results in insufficient
heat for the anti-ice system and consequent aerodynamic degradation. This action is intended to
address the identified unsafe condition.

FMI: www.avantext.com/media/files/ADs/20031206.pdf