Airworthiness Directive · Amendment 39-16450 · Flight controls
Bombardier, Inc. Model CL-600-2C10 (Regional Jet Series 700, 701, & 702) Airplanes, Model CL-600-2D15 (Regional Jet Series 705) Airplanes, and Model 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, Model CL-600-2D15 (Regional Jet Series 705) airplanes, and Model CL-600-2D24 (Regional Jet Series 900) airplanes; certificated in any category, that are equipped with Thales angle of attack (AOA) transducers having part number (P/N) C16258AA.
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:
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
Do the following actions.
(1) Within the applicable compliance times specified in Table 1 of this AD: Measure the inrush current of both AOA transducers, in accordance with Part A of the Accomplishment Instructions of Bombardier Service Bulletin 670BA-27-051, dated May 14, 2009.
| For any AOA transducer that, as of November 13, 2009 (the effective date of AD 2009-22-12), has accumulated— | Do the initial inrush current measurement— |
|---|---|
| Less than 6,500 total flight hours | Before the AOA transducer has accumulated 7,500 total flight hours. |
| More than or equal to 6,500 total flight hours but less than 7,500 total flight hours | Within 500 flight hours after November 13, 2009, but before the AOA transducer has accumulated 8,000 total flight hours. |
| More than or equal to 7,500 total flight hours | Within 250 flight hours after November 13, 2009. |
(2) If, during any measurement required by paragraph (g)(1) of this AD, an AOA transducer is found to have an inrush current less than 1.60 amps (“degraded” transducer), before further flight replace the transducer with a new or serviceable transducer, in accordance with Part C of the Accomplishment Instructions of Bombardier Service Bulletin 670BA-27-051, dated May 14, 2009. Do the measurement specified in paragraph (g)(1) of this AD for that replacement transducer at the times specified in paragraph (g)(2)(i) or (g)(2)(ii) of this AD.
(i) At the applicable time specified in Table 2 of this AD if the degraded transducer was replaced with a serviceable transducer that is not new; or
(ii) Within 2,000 flight hours after replacement if the degraded transducer was replaced with a new one.
(3) If, during any measurement required by paragraph (g)(1) of this AD, an AOA transducer is found to have an inrush current more than or equal to 1.60 amps, repeat the measurement specified in paragraph (g)(1) of this AD thereafter at intervals not to exceed the applicable interval specified in Table 2 of this AD.
| If the last inrush current measurement of the serviceable AOA transducer is— | Then repeat the measurement— |
|---|---|
| More than or equal to 1.90 amps | Within 2,000 flight hours after the last measurement. |
| More than or equal to 1.80 amps but less than 1.90 amps | Within 1,500 flight hours after the last measurement. |
| More than or equal to 1.70 amps but less than 1.80 amps | Within 1,000 flight hours after the last measurement. |
| More than or equal to 1.60 amps but less than 1.70 amps | Within 500 flight hours after the last measurement. |
Within 6,000 flight hours after the effective date of this AD: Do an inspection to determine the serial number of the AOA transducer having P/N C16258AA, and to determine if the serial number has suffix “A,” in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 670BA-27-053, Revision B, dated January 12, 2010.
(1) If the serial number is not specified in paragraph 1.A.(1) of Bombardier Service Bulletin 670BA-27-053, Revision B, dated January 12, 2010, no further action is required by this paragraph.
(2) If the serial number is specified in paragraph 1.A.(1) of Bombardier Service Bulletin 670BA-27-053, Revision B, dated January 12, 2010, and the serial number has a suffix “A,” no further action is required by this paragraph.
(3) If the serial number is specified in paragraph 1.A.(1) of Bombardier Service Bulletin 670BA-27-053, Revision B, dated January 12, 2010, and the serial number does not have suffix “A,” before further flight, replace the AOA transducer with a serviceable transducer, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 670BA-27-053, Revision B, dated January 12, 2010.
(i) As of the effective date of this AD, no person may install, on any airplane, an AOA transducer having P/N C16258AA with any serial number specified in paragraph 1.A.(1) of Bombardier Service Bulletin 670BA-27-053, Revision B, dated January 12, 2010, unless the serial number has a suffix “A.”
(j) Inspections and replacements accomplished before the effective date of this AD, according to the service information specified in Table 3 of this AD, are considered acceptable for compliance with the corresponding actions specified in this AD.
| Service Bulletin— | Revision— | Date— |
|---|---|---|
| Bombardier Service Bulletin 670BA-27-053 | Original | May 14, 2009. |
| Bombardier Service Bulletin 670BA-27-053 | A | July 7, 2009. |
Note 1: This AD differs from the MCAI and/or service information as follows: No differences.
