Summary
We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:
Two events have been reported of Fokker 100 (F.28 Mk.0100) aircraft, where the Nose Landing Gear (NLG) failed to extend in the normal mode and problems were experienced to open the NLG doors, almost preventing extension of the NLG in the emergency (alternate) mode. Subsequent investigation and tests have shown that the friction of the bearing in the roller of the NLG Door Uplock Bracket Assembly is high, causing increased resistance in the mechanical system that unlocks the NLG doors. This condition, if not corrected, may result in a NLG up landing, which is considered a hazardous event.
The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.