16--HEAT EXCHANGER,AIR, IN REPAIR/MODIFICATION OF

pair from other than the current source(s). The subject item requires Government source approval prior to contract award, as the item is flight critical and/or the technical data available has not been determined adequate to support acquisition via full and open competition. Only the source(s) previ

ously approved by the Government for this item have been solicited. The time required for approval of a new source is normally such that an award cannot be delayed pending approval of a new source. If you are not an approved source you must