Modification of engine cowling to install a Sight Glass.

Installation of a No. 1 emergency power supply system.

Installation of the No. 2 emergency power supply system.

Installation of the Howell engine monitoring system.

Installation of AlliedSignal TFE731-3D-1C Turbofan Engine(s).

Installation of AlliedSignal Aerospace N1 Digital Electronic Engine Control (DEEC)

Installation of bite or fault indicator unit connected to electronic sequencing unit of Garrett 36-100(A) aux. power unit.

Installation of a Garrett AiResearch GTCP 36-100(A) APU.

Installation of a Howell N1 engine monitoring system.

Installation of the Howell ITT instrument.