scope:

This notice is for principal operations inspectors (POI) of certificate holders operating Boeing 747-400 airplanes. It advises those inspectors and applicable certificate holders of a latent risk of failure associated with existing hardware in the integrated display systems on those airplanes. It also recommends the implementation of procedures detailed in Boeing Operations Manual Bulletin entitled "Flight Deck Display Unit Blanking Anomaly" be included in each operator's quick-reference handbook until a more permanent modification is made to the EFIS/EICAS interface units. An airworthiness directive requiring that modification is expected to terminate the need for the interim procedures of that bulletin. This notice is in response to National Transportation Safety Board (NTSB) recommendations A-03-55 and A-03-56.