Airworthiness Directive · Amendment 39-16421 · Air conditioning
Bombardier, Inc. Model CL-600-2C10 (Regional Jet Series 700, 701 & 702), CL-600-2D15 (Regional Jet Series 705), and CL-600-2D24 (Regional Jet Series 900) Airplanes
This AD applies to Bombardier, Inc. Model CL-600-2C10 (Regional Jet Series 700, 701, & 702) airplanes, certificated in any category, serial numbers 10003 through 10260 inclusive; and Model CL-600-2D15 (Regional Jet Series 705) and CL-600-2D24 (Regional Jet Series 900) airplanes, certificated in any category, serial numbers 15001 through 15095 inclusive.
We are superseding an existing airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:
Unless already done, do the following actions. Within 450 flight hours after May 29, 2009 (the effective date of AD 2009-10-10), inspect the OFV for proper operation of the manual mode motor and altitude limitation functions, in accordance with Part A of the Accomplishment Instructions of Bombardier Alert Service Bulletin A670BA-21-022, dated August 3, 2006 (“the service bulletin”). If the OFV manual mode motor or altitude limitation functions do not operate properly, before further flight, do the actions specified in paragraphs (f)(1) and (f)(2) of this AD. Repeat the inspection thereafter at intervals not to exceed 450 flight hours. Accomplishing the actions specified in paragraph (g) of this AD terminates the requirements of this paragraph.
(1) Make sure that the electrical connectors, MPE23P1 and MPE23P2, are connected to the OFV.
(2) Repeat the inspection of the OFV for proper operation of the manual mode motor and altitude limitation functions, in accordance with Part A of the service bulletin. If the OFV manual mode motor or altitude limitation functions do not operate properly, before further flight, replace the OFV with a new or serviceable valve in accordance with Tasks 21-32-01-000-801 and 21-32-01-400-801 of the Bombardier CRJ Regional Jet Series Aircraft Maintenance Manual, CSP B-001, Part 2, Volume 1, Revision 28, dated January 20, 2009, and do the inspection of the OFV specified in paragraph (f) of this AD.
Unless already done, do the following actions.
(1) Prior to accomplishing the actions specified in paragraph (g)(2) of this AD: Install modified or new CPC units, P/N GG670-98002-7, in accordance with Part B of the Accomplishment Instructions of Bombardier Alert Service Bulletin A670BA-21-022, dated August 3, 2006.
(2) Within 4,500 flight hours after the effective date of this AD: Install modified or new CPCPs, P/N GG670-98001-11, in accordance with Part C of the Accomplishment Instructions of Bombardier Alert Service Bulletin A670BA-21-022, dated August 3, 2006. Doing the actions required by paragraph (g)(2) of this AD terminates the requirements of paragraph (f) of this AD.
(h) Installing CPC units, P/N GG670-98002-9, in accordance with Bombardier Service Bulletin 670BA-21-030, dated December 22, 2009, is acceptable for compliance with the corresponding requirements of paragraph (g)(1) of this AD.
(i) Actions done before May 29, 2009, in accordance with a Liebherr service bulletin identified in Table 1 of this AD, are acceptable for compliance with the corresponding requirements of paragraph (g)(1) or (g)(2) of this AD.
| Liebherr Service Bulletin— | Revision— | Dated— |
|---|---|---|
| GG670-98001-21-03 | Original | March 21, 2006. |
| GG670-98001-21-03 | 1 | November 15, 2007. |
| GG670-98002-21-02 | Original | April 21, 2006. |
| GG670-98002-21-02 | 1 | November 15, 2007. |
Note 1: This AD differs from the MCAI and/or service information as follows: The MCAI and Bombardier Alert Service Bulletin A670BA-21-022, dated August 3, 2006, do not describe corrective actions for findings of improper OFV manual mode motor and altitude limitation functions. This AD requires the actions in paragraphs (f)(1) and (f)(2) of this AD, which include replacing the valve if the OFV manual mode motor or altitude limitation functions do not operate properly.
