Summary
We are revising an earlier NPRM for the products listed above. This action revises the earlier NPRM by expanding the scope. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:
[T]he FAA has published SFAR 88 (Special Federal Aviation Regulation 88). * * * Under this regulation, all holders of type certificates for passenger transport aircraft * * * are required to conduct a design review against explosion risks. One of the consequences of the Airbus design review is the modification of the fuel pump wiring to provide protection against chafing of the fuel pump cables. This condition, if not corrected, could result in short circuits leading to fuel pump failure, arcing, and possible fuel tank explosion. [A previous AD] was issued to require * * * modification [of the fuelpump against short circuit] * * *. More recently, an additional modification of the electrical wiring of the outer fuel pump and the landing lights on the left (LH) and right (RH) sides has been introduced * * *. The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.