Airworthiness Directives; Saab Model SAAB-Fairchild SF340A (SAAB/SF340A) and SAAB 340B Airplanes
airworthiness · Rule · Final rule. · Published 2006-05-12 · Effective 2006-06-16 · 71 FR 27598
Document
Document number
06-4309
Federal Register citation
71 FR 27598
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
Saab Model SAAB-Fairchild SF340A (SAAB/SF340A) and SAAB 340B
Publication date
2006-05-12
Effective date
2006-06-16
FAA docket
Docket No. FAA-2006-24075
Abstract
The FAA is adopting a new airworthiness directive (AD) for certain Saab Model SAAB-Fairchild SF340A (SAAB/SF340A) and SAAB 340B airplanes. This AD requires a one-time inspection to see if a faulty uplock axle for the shock strut of the main landing gear (MLG) is installed, and replacing the uplock axle with a new uplock axle if necessary. This AD results from a report of a cracked uplock axle caused by hydrogen embrittlement during the manufacturing process. We are issuing this AD to prevent failure of the uplock mechanism, which, combined with a loss of hydraulic pressure, could result in an uncommanded extension of the MLG.