1978. Both the single-engine certification test program occurred in April 1978. Both the airflow.

INDICATORS e DISPLAYS BACKUP OPTICAL UNIT NOSE AIR DATA SENSOR (BOTH SIDES) a REMOTE MANIPULATOR CLOSED-CIRCUIT TELEVISION MONITORS ROTATIONAL HAND CONTROLLER TRANSLATION HAND CONTROLLER FOR REMOTE MANIPULATOR i SYSTEM (NOT ON STS-1) N CREW EMERGENCY EGRESS PYROTECHNIC ACTUATION MECHANISMS (2) CREW TRANSFER T UNNEL KIT.