Airworthiness directives › 2016-22-15
AD 2016-22-15 Airworthiness Directives; Saab AB, Saab Aeronautics (Formerly Known as Saab AB, Saab Aerosystems) Airplanes
Models named: SAAB 340B. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Saab AB, Saab Aeronautics (formerly known as Saab AB, Saab Aerosystems) Model 340A (SAAB/SF340A) and SAAB 340B airplanes, certificated in any category, as identified in paragraphs (c)(1) and (c)(2) of this AD. (1) Model 340A (SAAB/SF340A) airplanes, serial numbers 004 through 159 inclusive. (2) Model SAAB 340B airplanes, serial numbers 160 through 459 inclusive, except serial numbers 170, 342, 362, 363, 367, 372, 379, 385, 395, 405, 409, 431, 441, and 455.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
For airplanes identified in paragraphs (g)(1) and (g)(2) of this AD: Within 30 days after the effective date of this AD, do the deactivation specified in paragraph (g)(1) or (g)(2) of this AD, as applicable to airplane configuration, in accordance with the Accomplishment Instructions of Saab Service Bulletin 340-27-116, dated October 18, 2013. (1) For airplanes with a basic wing tip that has been modified using Saab Service Bulletin 340-27-098: Deactivate the stall speed curves in the SWC having part number (P/N) 0020AK6. (2) For airplanes with an extended wing tip that has been modified using Saab Service Bulletin 340-27-099: Deactivate the stall speed curves in the SWC having P/N 0020AK7.
Unsafe condition
This AD was prompted by a determination that airplanes with certain modifications were excluded from the applicability in AD 2012-24-06, and are affected by the identified unsafe condition; and the stall warning computer (SWC) required by AD 2012-24-06 contained erroneous logic. We are issuing this AD to prevent natural stall events during operation in icing conditions, which could result in loss of control of the airplane.
Affected ADs
This AD replaces AD 2012-24-06, Amendment 39-17276 (77 FR 73279, December 10, 2012) (“AD 2012-24-06”).
Read the original on the Federal Register →
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1