Airworthiness Directive · Amendment 39-14006 · Boeing Model 737-300, -400, and -500 Series Airplanes Modified In Accordance With Supplemental Type Certificate (STC) ST00127BO
Boeing Model 737-300, -400, and -500 Series Airplanes Modified In Accordance With Supplemental Type Certificate (STC) ST00127BO
This AD applies to Boeing Model 737-300, -400, and -500 series airplanes; certificated in any category; modified in accordance with Supplemental Type Certificate (STC) ST00127BO.
The FAA is adopting a new airworthiness directive (AD) for Boeing Model 737-300, -400, and -500 series airplanes modified in accordance with STC ST00127BO. This AD requires installation of bonding straps to the safe side harnesses of the digital transient suppression device of the fuel quantity indicating system. This AD is prompted by the results of fuel system reviews conducted by the STC holder. We are issuing this AD to prevent unsafe levels of current or energy from entering the fuel tank, due to hot short faults or threat conditions associated with the safe side harness assembly, which could result in a fire or explosion of the fuel tank.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
Within 12 months after the effective date of this AD, modify the safe side harness connectors at the tank penetrations and the digital transient suppression devices, in accordance with the Accomplishment Instructions of Goodrich Service Bulletin 737-300766-28-2, Revision 2, dated July 28, 2004.
As of the effective date of this AD, no person may install a safe side harness, Part Number 50357-01XX, on any airplane, unless that safe side harness has been modified in accordance with Goodrich Service Bulletin 737-300766-28-2, Revision 2, dated July 28, 2004.
