The FAA on March 28 published a revised version of AC No: 20-138D that clarifies and adds new guidance material to the airworthiness approval process for a variety of GPS systems, including augmented GPS, and Rnav equipment for RNP operations and baro-Vnav equipment.
The Aviation Safety Reporting System (ASRS) continues to receive reports indicating that pilots’ ability to maintain real-world awareness can be eroded by over-reliance on (often highly dependable) programmed control of the aircraft.
Mid-Canada Mod Center of Toronto recently installed a Universal Avionics FMS upgrade in Advanced Aerospace Solutions’s Piaggio Avanti human-factors research platform. The new FMS allows AdvAero test pilots to fly LPV Rnav global navigation satellite system approaches. Other FMS features include dedicated direct-to function, FMS heading function, PVOR tracking, Vnav and user-defined holding patterns. The installation also added an LP/LPV monitor, which “provides monitoring and positioning information for Rnav (GNSS) approaches with LPV minimums,” according to Universal Avionics.
The second greatest shock to pilot Jim Huddleston and his co-captain after their Learjet 45 struck some trees during a night approach at Saratoga Springs (5B2) in July 2008 was that an almost obscure gray arrow symbol on the GPS Runway 5 approach plate apparently did not live up to expectations.