AD2013-13-09 is issued to prevent failure of the braking system or adverse operation of the spoiler and thrust reverser system due to external damage.
The Federal Aviation Administration (FAA) has issued Airworthiness Directive AD2013-13-09 in regards to the Learjet 60 Brake System. This AD requires three separate Service Bulletins (SB) be accomplished within 12 months or 600 hours from August 6, 2013, the effective date of the AD.
The following are the required SB:
SB 60-32-33, Dated July 23, 2012
Installation of rigid hydraulic tube assemblies and improved MLG squat switch bracket
SB 60-57-7, Dated July 23, 2012
Installation of metal shields and brackets for the wiring and tubes on the lower struts
SB 60-78-7, Dated May 1, 2006
Improved wheel speed detect box and TR interface box
The summary and complete AD can be viewed at the following:
Submitted by Dave Schiver, Airframe Tech Rep
is an Airframe Technical Representative at Duncan Aviation’s Lincoln, Nebr. (LNK) facility. He specializes in Learjet aircraft. His aviation career began in 1981.