rm 813076,. Application for -Airwerthibeea. Certificate for adding "Market .SurVey" .to the authorized operations of our Expeiimental Airuorthihess: Certifibate. -• - • - • . . . . The aircraft'is a Boeing 727-100...Whibhhas been retrofitted with P & W.JTBD-219 engines on the POD pOsitiOnS•And -78 i