Aircraft
Certification Service Washington, DC U.S. Department of Transportation Federal Aviation Administration
NM-10-06
October 20, 2009
This is information only. Recommendations
aren’t mandatory.
Introduction
The Special Airworthiness Information Bulletin (SAIB) advises you,
owners and operators of Bombardier Model CL 600-2B19 (Regional
Jet Series 100/200/440) aircraft with third crewmember oxygen hose
systems installed, with recommendations to conduct a one-time visual
inspection of the third crewmember oxygen hose to ensure proper
installation and condition of the oxygen flexible hose mounted behind
the third crewmember stowage box assembly.
Background
While parked at the gate, following the application of ground power, a
Bombardier Model CL-600-2B19 (CRJ-200) aircraft suffered a fire in the
vicinity of the JB1 junction box assembly. The fire was fed by oxygen
from a breach of the third crewmember oxygen supply installation,
forward of the JB1 junction box. The two crewmembers on board were not
injured.
Bombardier has issued Service Information Letter (SIL),
CRJ100/200/440-SL-35-005, Revision A, dated 30 June 2009, to all
affected operators with an inspection recommendation that provides
interim inspection recommendations for a one-time visual inspection to
ensure the integrity of the installation of the third crewmember oxygen
flexible hose. Particular attention to this area should be taken to
ensure no chafing or damage is present along the routing from the mask
stowage box up to the aircraft connection behind the wardrobe.
Transport Canada Civil Aviation (TCCA) has issued a Service Difficulty
Alert, Inspection of the Third Crewmember Oxygen Hose, No. AL-2009-05,
dated July 16, 2009. As of the date of this publication, failure of the
oxygen hose has not been determined to be the cause of the event, which
remains under investigation by Bombardier and the National
Transportation Safety Board (NTSB).
In the absence of any conclusive findings at this time, this
airworthiness concern is not an unsafe condition that would warrant AD
action under Title 14 of the Code of Federal Aviation Regulations (14
CFR) part 39. Upon further findings of the investigation and
determination of the cause of the event, we will evaluate if AD action
is warranted at that time.
Recommendations
We recommend that all owners and operators comply with actions outlined
in Bombardier SIL CRJ100/200/440-SL-35-005, Revision A, dated 30 June
2009, and conduct a one-time visual inspection of the third crewmember
oxygen flexible hose for general condition, damage and security of
installation. Any damaged hose should be replaced in accordance with
the Aircraft Maintenance Manual.
We request that any abnormal findings be brought to the attention of
Bombardier, and damaged hoses should be forwarded to Bombardier for
examination.
For Further Information Contact
FAA, Christopher Alfano, Aerospace Engineer, NYACO, ANE-171, 1600
Stewart Ave, Suite 410, Westbury, N.Y. 11590; phone: (516) 228-7340;
fax: (516) 794-5531; e-mail: christopher.alfano@faa.gov.
Transport Canada Civil Aviation, Paul Jones, Manager, Corrective
Action, Accident / Incidents Investigations, Continuing Airworthiness,
Aircraft Certification, Place de Ville, Tower C (AARDG), 330 Sparks
Street, 2nd Floor, Ottawa, Ontario, K1A 0N5, phone: (613) 952-4431,
fax: (613) 996-9178, e-mail: paul.jones@tc.gc.ca