Summary
The FAA proposes to adopt a new airworthiness directive (AD) for certain Bombardier, Inc., Model DHC-8-401 and -402 airplanes. This proposed AD was prompted by a report that certain fuselages were delivered with non-conforming keel tension fittings and stringer end fittings. This proposed AD would require a detailed visual inspection of stringer end fittings and keel fittings for loose or working fasteners, signs of wear, and corrosion, and repair if necessary; and a general visual inspection of the keel tension fitting and stringer end fittings, as applicable and repairs and replacement of the keel and stringer end fittings if necessary. The FAA is proposing this AD to address the unsafe condition on these products.