Airworthiness Directive · Amendment 39-9776 · Lockheed Aircraft Corporation Airplanes
Lockheed Aircraft Corporation Airplanes
Superseded. A later AD replaced this one: AD 2000-16-08. Comply with the one in force.
This AD applies to Lockheed Aircraft Corporation L-1011-385 Series (all).
The models as the FAA's AD index lists them. The serial ranges, installed parts and exceptions are in the AD itself: read it at the FAA.
This amendment adopts a new airworthiness directive (AD) that is applicable to certain Lockheed Model L-1011-385 series airplanes. This action requires inspections to detect cracking of the canted pressure bulkhead at fuselage station (FS) 1212, and inspections to detect cracking of the web at the fastener rows of the vertical stiffener-to-web; and repair or replacement of the web with a new web, if necessary. This amendment is prompted by a report of fatigue cracking of the canted pressure bulkhead at FS 1212. The actions specified in this AD are intended to detect and correct such fatigue cracking, which could result in blowout of a panel between adjacent stiffeners and consequent cabin depressurization.
