Airworthiness directives › 2012-13-01
AD 2012-13-01 Airworthiness Directives; Saab AB, Saab Aerosystems Airplanes
Applicability*9
This AD applies to Saab AB, Saab Aerosystems Model 340A (SAAB/SF340A) and SAAB 340B airplanes, certificated in any category, all serial numbers.
Compliance
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
Required actions
Within the applicable time specified in table 1 of this AD, inspect each elevator pushrod assembly to determine the part number (P/N). (1) If a P/N TDF11755 elevator pushrod assembly is installed, or if the part number cannot be determined: Before further flight, replace the affected elevator pushrod assembly with a P/N R20990 elevator pushrod assembly, in accordance with the Accomplishment Instructions of Saab Service Bulletin 340-27-100, dated February 1, 2011. (2) If a P/N 12003-33 or P/N R20990 elevator pushrod assembly is installed: Do a detailed inspection for individual play between the rod end and the pushrod at the locking device and degradation of the elevator pushrod assembly (including rod end threads not visible through the inspection hole in the pushrod, and the nut and locking device not properly locked with the lock wire), in accordance with the Accomplishment Instructions of Saab Service Bulletin 340-27-100, dated February 1, 2011. Table 1—Compliance Times Total flight hours accumulated as of the effective date of this AD Compliance time For airplanes with 30,000 total flight hours or more Within 6 months after the effective date of this AD. For airplanes with 28,000 total flight hours or more, but less than 30,000 total flight hours Before the accumulation of 30,000 total flight hours or within 6 months after the effective date of this AD, whichever occurs later. For airplanes with less than 28,000 total flight hours Before the accumulation of 30,000 total flight hours.
Unsafe condition
This AD was prompted by reports indicating that wear of the elevator pushrods has occurred on some airplanes after extended time in service. We are issuing this AD to prevent a free elevator from affecting the pitch control authority, which may result in reduced controllability of the airplane.
Affected ADs
None.
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