Airworthiness Directives; Bombardier Model CL-600-2B19 (Regional Jet Series 100 & 440) Airplanes
airworthiness · Rule · Final rule. · Published 2005-04-07 · Effective 2005-05-12 · 70 FR 17604
Document
Document number
05-6686
Federal Register citation
70 FR 17604
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
Bombardier Model CL-600-2B19 (Regional Jet Series 100 & 440)
Publication date
2005-04-07
Effective date
2005-05-12
FAA docket
Docket No. FAA-2004-19761
Abstract
The FAA is adopting a new airworthiness directive (AD) for certain Bombardier Model CL-600-2B19 (Regional Jet Series 100 and 440) airplanes. This AD requires modification of the Auxiliary Power Unit (APU) cooling air exhaust. This AD is prompted by reports of incomplete drainage of the APU enclosure. We are issuing this AD to prevent a negative pressure condition from developing in the APU enclosure when the APU is operating on the ground, which could create a potential fire hazard if flammable liquid leakage occurs inside the APU enclosure and cannot be drained overboard.