Airworthiness Directive · Amendment 39-19923 · Electrical power
Bombardier, Inc., Airplanes
This AD applies to Bombardier, Inc., Model BD-700-1A10 and BD-700-1A11 airplanes, certificated in any category, serial numbers 9002 through 9828 inclusive, 9830, 9832 through 9835 inclusive, 9840, 9854, 9855, and 9998.
The FAA is adopting a new airworthiness directive (AD) for certain Bombardier, Inc., Model BD-700-1A10 and BD-700-1A11 airplanes. This AD was prompted by a report that the anti-fretting coating on the piston rods of certain ram air turbine (RAT) deployment actuators may have been incorrectly applied. This AD requires a review of airplane maintenance records or an inspection of the RAT deployment actuator to determine the serial number and, depending on the findings, replacement with an upgraded RAT deployment actuator. The FAA is issuing this AD to address the unsafe condition on these products.
Within 36 months after the effective date of this AD: Perform an inspection to determine the serial number of the RAT deployment actuator, having part number (P/N) BZ02001-01 (GL456-1301-1). A review of the airplane maintenance records is acceptable in lieu of this inspection, provided the serial number of the RAT deployment actuator can be conclusively determined from that review.
(1) If the serial number of the RAT deployment actuator is not listed in the table referred to in paragraph 2.B., Part A-Special Check, of the Accomplishment Instructions of the applicable Bombardier service information specified in figure 1 to paragraphs (g)(1) and (2), (h), and (i) of this AD, no further action is required by this AD.
(2) If the serial number of the RAT deployment actuator is listed in the table referred to in paragraph 2.B., Part A-Special Check, of the Accomplishment Instructions of the applicable Bombardier service information specified in figure 1 to paragraphs (g)(1) and (2), (h), and (i) of this AD, do the replacement required by paragraph (h) of this AD.
If, during the inspection or records review required by paragraph (g) of this AD, any RAT deployment actuator is found to have an affected serial number: Within 36 months after the effective date of this AD, replace the RAT deployment actuator, having P/N BZ02001-01 (GL456-1301-1), with an upgraded part, in accordance with Paragraph 2.C., Part B-Modification, of the Accomplishment Instructions of the applicable Bombardier service information specified in figure 1 to paragraphs (g)(1) and (2), (h), and (i) of this AD.
