Airworthiness Directive · Amendment 39-9809 · The Boeing Company Airplanes
The Boeing Company Airplanes
This AD applies to The Boeing Company 737-100 Series, 737-200 Series.
The models as the FAA's AD index lists them. The serial ranges, installed parts and exceptions are in the AD itself: read it at the FAA.
This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 737-100 and -200 series airplanes, that requires replacement of the 250 volt-ampere (VA) rated static inverters with 410 VA or 500 VA rated static inverters, and an operational test of the standby electrical power system. This amendment is prompted by a report that accomplishment of a certain modification could result in overload of the static inverter on these airplanes. The actions specified by this AD are intended to prevent overload of the static inverter, which could result in the loss of the 115 volt alternating current (VAC) standby bus and the associated flight instruments when the airplane is operating on standby electrical power.
