Airworthiness Directive 00-4120
one-timeAirworthiness Directives; Airbus Model A319, A320, and A321 Series Airplanes
What this AD requires
This amendment adopts a new airworthiness directive (AD) that is applicable to certain Airbus Model A319, A320, and A321 series airplanes. This action requires a revision to the Limitations and Normal Procedures Sections of the FAA-approved Airplane Flight Manual (AFM) to limit the use of the radio altimeter of the flight management guidance system (FMGS) during the approach phase of flight. This action also provides for an optional terminating modification, which, if accomplished, would terminate the requirement for the AFM revision. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified in this AD are intended to prevent erroneous display of decision height information to the flight crew during final approach, which could result in an increased risk of collision with the terrain.
Which aircraft AD 00-4120 applies to
Whether AD 00-4120 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.
How AD compliance is recorded
A valid compliance record (14 CFR 43.9) states:
Tailplate reads a tail number’s logbooks and matches every applicable AD — including this one — to its compliance evidence, with recurring next-due dates computed.
Look up a tail number →Read the full directive (Federal Register)Applicability is derived from the FAA directive corpus and is advisory, not a legal airworthiness determination. Compliance is established only from an aircraft’s actual records.