PLANNING AHEAD FOR SB237 INSPECTION
SAVES TIME AND MONEY
The inspection required by the airworthiness directive is detailed in Service Bulletin 237, and applies to 690, 690A, and 690B Twin Commanders (with the exception of six serial-number specific aircraft). Affected aircraft must be inspected for corrosion between the upper wing skin panels and engine mount beam support straps. The inspection must be performed within the next 150 hours time in service beginning January 8, 2010, or by January 8, 2011, whichever comes first.
The inspection process involves removal of the upper engine nacelles to expose the engine mount beam support straps, and removal of the straps to inspect for corrosion on the exposed upper wing skins.
Due to the volume of aircraft in the fleet still requiring the inspection�some 200 aircraft worldwide�Twin Commander was able to fend off some steep material price increases this year on SB237 inspection and rework kits. In addition, many service centers have staffed up and have been offering guaranteed slots for folks that schedule ahead to beat the end-of-year rush for compliance.
Scheduling your SB237 inspection ahead of time ensures availability of resources at the service center and availability of parts from the factory. Owners are encouraged to take advantage of these factors and coordinate their inspection and other maintenance requirements with their service center to make sure hangar space is available.
Owners who have not yet scheduled the inspection with an authorized service center should consider doing so soon. Available slots are filling up, and failure to secure a slot and complete the inspection before the compliance date could affect the airworthiness of the aircraft.
Don't wait until the last-minute rush. Contact your authorized Twin Commander service center today to schedule your SB237 inspection.
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