Action
Supplemental notice of proposed rulemaking (NPRM); reopening of comment period.
Summary
We are revising an earlier proposed airworthiness directive (AD) for certain Airbus Model A300 B4-601, B4-603, and B4-605R airplanes; Model A300 F4-605R airplanes; Model A300 C4-605R Variant F airplanes; and Model A310-204 and -304 airplanes; powered by General Electric (GE) CF6-80C2 series engines. The NPRM proposed to require installing a shunt of the rotary selector (introducing an auto-relight function). The NPRM was prompted by reports of two single-engine flameout events during inclement weather. This action revises the NPRM by adding an additional wiring modification to a certain circuit breaker panel. We are proposing this AD to prevent a long engine restart sequence after a non-selection of continuous relight by the crew and a flameout event of both engines, which could result in reduced controllability of the airplane, especially at low altitude. Since these actions impose an additional burden over that proposed in the NPRM, we are reopening the comment period to allow the public the chance to comment on these proposed changes.