Airworthiness Directives; Bombardier Model CL-600-2C10 (Regional Jet Series 700 & 701), and CL-600-2D24 (Regional Jet Series 900) Series Airplanes

[Federal Register Volume 69, Number 206 (Tuesday, October 26, 2004)]
[Rules and Regulations]
[Pages 62400-62401]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 04-23927]



[[Page 62400]]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2004-18993; Directorate Identifier 2004-NM-125-AD; 
Amendment 39-13781; AD 2004-18-03]
RIN 2120-AA64


Airworthiness Directives; Bombardier Model CL-600-2C10 (Regional 
Jet Series 700 & 701), and CL-600-2D24 (Regional Jet Series 900) Series 
Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule; correction.

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SUMMARY: The FAA is correcting an error in an existing airworthiness 
directive (AD) that was published in the Federal Register on September 
2, 2004 (69 FR 53609). The error resulted in inadvertent reference to 
inappropriate service information. We are also clarifying reference to 
a compliance threshold. This AD applies to certain Bombardier Model CL-
600-2C10 (Regional Jet Series 700 & 701), and CL-600-2D24 (Regional Jet 
Series 900) series airplanes. This AD requires revising the airplane 
flight manual to advise the flightcrew to monitor the fuel quantity in 
the center fuel tank throughout the flight. This AD also requires 
repetitive tests to detect a fuel leak between the wing fuel tanks and 
the center fuel tank; and further related investigative and corrective 
actions, if necessary. For certain airplanes, this AD also requires 
installation of flexible hoses and brackets in the fuel feed system. 
This AD also reduces the compliance times for the repetitive checks, 
requires replacement of primary fuel feed ejectors with new ejectors, 
and provides an optional center fuel tank empty procedure.

DATES: Effective September 17, 2004.

ADDRESSES: You can examine the contents of this AD docket on the 
Internet at http://dms.dot.gov, or in person at the Docket Management 
Facility, U.S. Department of Transportation, 400 Seventh Street, SW., 
room PL-401, on the plaza level of the Nassif Building, Washington, DC.

FOR FURTHER INFORMATION CONTACT:
    Technical information: James Delisio, Aerospace Engineer, Airframe 
and Propulsion Branch, ANE-171, FAA, New York Aircraft Certification 
Office, 1600 Stewart Avenue, Suite 410, Westbury, New York 11590; 
telephone (516) 228-7321; fax (516) 794-5531.
    Plain language information: Marcia Walters, [email protected].

Docket Management System (DMS)

    The FAA has implemented new procedures for maintaining AD dockets 
electronically. As of May 17, 2004, new AD actions are posted on DMS 
and assigned a docket number. We track each action and assign a 
corresponding directorate identifier. The DMS AD docket number is in 
the form ``Docket No. FAA-2004-99999.'' The Transport Airplane 
Directorate identifier is in the form ``Directorate Identifier 2004-NM-
999-AD.'' Each DMS AD docket also lists the directorate identifier 
(``Old Docket Number'') as a cross-reference for searching purposes.

Examining the Docket

    You can examine the AD docket on the Internet at http://dms.dot.gov, or in person at the Docket Management Facility between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays.

SUPPLEMENTARY INFORMATION: On August 25, 2004, the FAA issued AD 2004-
18-03, amendment 39-13781 (69 FR 53609, September 2, 2004), for certain 
Bombardier Model CL-600-2C10 (Regional Jet Series 700 & 701), and CL-
600-2D24 (Regional Jet Series 900) series airplanes. The AD requires 
revising the airplane flight manual to advise the flightcrew to monitor 
the fuel quantity in the center fuel tank throughout the flight. This 
AD also requires repetitive tests to detect a fuel leak between the 
wing fuel tanks and the center fuel tank; and further related 
investigative and corrective actions, if necessary. For certain 
airplanes, this AD also requires installation of flexible hoses and 
brackets in the fuel feed system. This AD also reduces the compliance 
times for the repetitive checks, requires replacement of primary fuel 
feed ejectors with new ejectors, and provides an optional center fuel 
tank empty procedure.
    As published, the requirements of paragraph (j) of the AD specify 
that ``Within three days after the effective date of this AD, determine 
the number of total flight hours on each of the two primary fuel feed 
ejectors having part number (P/N) T99A38-603.'' Paragraph (j) is not 
clear with respect to the action required for an airplane on which fuel 
feed ejectors having part number T99A38-603 are not installed. 
Paragraph (j) has been clarified to state that if there are no fuel 
feed ejectors installed having P/N T99A38-603, no further action is 
required by the AD.
    As published, the compliance time for the requirements of paragraph 
(k) of the AD specifies a compliance time of ``before accumulating 
2,000 total flight hours or within 14 days after the effective date of 
this AD, whichever occurs later, * * *.'' To clarify that the threshold 
compliance time is for the fuel feed ejectors, we have added the words 
``on the fuel feed ejectors'' after the words ``before accumulating 
2,000 total flight hours.''
    As published, the requirements of paragraph (m) of the AD 
inadvertently specify performing certain requirements in accordance 
with Part A of the Accomplishment Instructions of CRJ 700/900 Regional 
Jet (Bombardier) ASB 670BA-28-025, Revision A, dated December 15, 2003. 
Reference to that service information in paragraph (m) of the AD is 
incorrect and has been removed. As discussed in the ``Differences'' 
section of the AD, the Canadian airworthiness directive specifies that 
the pilots receive a briefing on the procedure in use for the leak 
check. The AD does not require a pilot briefing, since the pre-flight 
procedures associated with performing the leak check should be 
accomplished by appropriate maintenance personnel. We have received 
reports that the intent of paragraph (m) of the AD is not clear. To 
provide clarification of paragraph (m) of the AD, a statement has been 
added to specify that the requirements of paragraph (m) must be 
performed by appropriate maintenance personnel.
    No other part of the regulatory information has been changed; 
therefore, the final rule is not republished in the Federal Register.
    The effective date of this AD remains September 17, 2004.


Sec.  39.13  [Corrected]

0
On page 53612, in the third column, paragraph (j) of AD 2004-18-03 is 
corrected to read as follows:
* * * * *
    (j) Within three days after the effective date of this AD, 
determine the number of total flight hours on each of the two primary 
fuel feed ejectors having part number (P/N) T99A38-603. If no primary 
fuel feed ejector having P/N T99A38-603 is installed, no further action 
is required by this AD.
* * * * *
0
On page 53613, in the first column, paragraph (k) of AD 2004-18-03 is 
corrected to read as follows:
* * * * *
    (k) Except as stated in paragraph (l) of this AD, before 
accumulating 2,000 total flight hours on the fuel feed ejector, or 
within 14 days after the effective date of this AD, whichever occurs 
later, begin doing the actions specified in paragraph

[[Page 62401]]

(m) or (p) of this AD. Accomplishing the actions specified in paragraph 
(m) or (p) of this AD ends the leak test (check) requirements of 
paragraph (h) of this AD.
* * * * *
0
On page 53613 in the first column, paragraph (m) of AD 2004-18-03 is 
corrected to read as follows:
* * * * *
    (m) Once a day, before the first flight of the day: With both 
engines operating at ground idle or taxi thrust, open both L&R XFER SOV 
circuit breakers, 1N9 and 2P8, and monitor the fuel quantity of the 
center fuel tank for five minutes. For the daily check, the fuel 
quantity in the center fuel tank must be 4,000 pounds or less. This 
daily check must be performed by appropriate maintenance personnel.
* * * * *

    Issued in Renton, Washington, on October 15, 2004.
Kalene C. Yanamura,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 04-23927 Filed 10-25-04; 8:45 am]
BILLING CODE 4910-13-P

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