Piper PA-34 Seneca

PA-34-220T Seneca III


In 1981, the PA-34-220T Seneca III was introduced, having completed certification on 17 December 1980.

The change in model designation reflected an engine upgrade. Continental TSIO-360-KB engines were used which produced 220 horsepower (165 kW), although only rated as such for five minutes and then dropping to 200 hp (149 kW)).

The horsepower increase, with the new engines' limit of 2800 rpm (up from 2575 rpm), combined for much improved climb and cruise performance.

The new aircraft also incorporated a one piece windshield and a bare metal instrument panel instead of one covered with a removable plastic fascia; and some models have electrically-actuated flaps.

More than 930 Seneca IIIs were built; the last 37 Seneca IIIs built had a 28-volt electrical system rather than the 14-volt system of previous aircraft.

The aircraft's gross weight was increased to 4,750 lb (2,155 kg) for takeoff and 4,513 lb (2,047 kg) for landing.

PA-34-220T Seneca IV

In 1994, the "New" Piper Aircraft company introduced the Seneca IV, having achieved certification on 17 November 1993.

This model was similar to the Seneca III offering minor improvements, such as a streamlined engine cowl for increased cruise performance.

It continued to use the counter-rotating Continental TSIO-360-KB engines and gross weights remained unchanged.

A total of 71 Seneca IVs were built.