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Notice of proposed rulemaking (NPRM).

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: It was reported that after commanding the landing gear lever to down the three green landing gear positioning indication was displayed followed by the LG/LEVER DISAGREE EICAS [engine indicating and crew alerting system] message. The crew decided to continue the approach and landing procedure. As soon as the crew identified that the landing gear was not extended properly, a go-around procedure was successfully performed. During maneuver, the airplane settled momentarily onto the flaps and belly. The unsafe condition is the landing gear remaining in the up and locked position during approach and landing and accompanied by an invalid EICAS landing gear position indication, which could result in landing with gear in the up position, and eliminate controllability of the airplane on ground. This may consequently result in structural damage to the airplane. The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.

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