The FAA has issued an airworthiness directive (AD)–2013-22-19–for the Gulfstream V and GV-SP to address unrelated problems with fuel boost pumps.
In one failure, overheat damage was found on the internal components and external housing, while fuel leakage was observed on the other. The agency also said it issued the AD to prevent fuel leakage in combination with a capacitor clearance issue, which could result in an uncontrolled wheel-well fire.
The AD requires an inspection to determine if fuel boost pumps with a particular part number are installed and possibly in need of replacement, and it also revises the airplane maintenance program for continued airworthiness compliance.
During the public comment period after the initial NPRM, Gulfstream asked the FAA to make it clear that “although two distinct failure types have been reported, there have been no reports of any fuel pumps exhibiting both failure types.” The FAA agreed and changed the rule’s summary section to emphasize the independent nature of the failure modes.
The AD becomes effective January 7.