NTSB Recommends Airworthiness Directive for Emergency Power Switches on McDonnell Douglas Aircraft
The National Transportation Safety Board urges the Federal Aviation Administration to impose a service life limit on specific emergency power switches used in DC-9 and MD-80 series airplanes.
The National Transportation Safety Board has issued recommendation number A-94-133, identified as item 79941. This recommendation directs the Federal Aviation Administration to issue an airworthiness directive. The directive would require that the emergency power switch, part number 103-2200, be limited to a maximum service life of ten thousand switching operations. This requirement applies specifically to the McDonnell Douglas DC-9 and MD-80 series airplanes. The recommendation aims to address safety concerns related to the operational lifespan of this critical component within the fleet.
Original regulatory source: https://data.ntsb.gov/carol-main-public/sr-details/A-94-133