Airworthiness Directives (ADs)

Aviation Industry

88-QE-140A

The aircraft owner or operator shall comply with Airworthiness Directives issued by the CAA or the aeronautics authority of the State of Design (SoD) of the aviation products, appliances and parts, and take all necessary actions thereto.

Issue Date: 1999/12/30

Applicability: Transport category airplanes equipped with any Mode "C" transponder with single Gillham code altitude input

Model Number: QE

CAA AD Number: 88-QE-140A

Aeronautics Authority of Original AD: FAA

Original AD Number: 99-23-22R1

Effective Date

Subject: To prevent false Traffic Alert Collision Avoidance System (TCAS II) advisories due to inaccurate airplane altitude reporting, which could result in the flightcrew deviating the airplane from its assigned flight path and a possible mid-air collision.

Reference Publications (Revision/ATA/SB): component maintenance manual, airplane maintenance manual, GSAC AD 2000-080, UK AD 001-08-99

Remarks

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