The AH-64C was the designation originally applied to AH-64A models upgraded to near AH-64D standard, including all upgrades except Longbow radar and new uprated T700-GE-701C engines. Approximately 540 were to be upgraded, but the designation was abandoned after 1993. Although the designation was dropped, the plan was not, and as of 2001 only about half the 501 AH-64A Apaches that are to be upgraded to the AH-64D configuration will receive the full upgrade, even though all will be designated AH-64D.
In 1991 the House of Representatives included an additional $11,000,000 for the implementation of a plan to `skip' the AH-64B model and move on to a AH-64B+ configuration. The Senate stated that an AH-64 upgrade program should be considered for inclusion in the FY93-FY98 budget and directed the Army to reevaluate its funding priorities on this program. In November 1991 the Congress agreed to provide an additional $21,000,000 for a program to upgrade the AH-64 to a `C' configuration (Apache Longbow, minus the T-800 engine and the mast mounted radar). However, none of these funds could be obligated until the Secretary of Defense submited to the House and Senate Appropriations Committees an AH-64 modification master plan and schedule, budget, and certified that this program was fully funded in RDT&E and procurement in the fiscal year 1993-1998 Future Year Defense Program (FYDP).
The 1994 Defense budget request contained $5.6 million for the AH-64 Apache helicopter program for FY95. There was a potential seven-month production break in the AH-64 Apache helicopter program between the last AH-64A delivery and the first AH-64C delivery. This gap was a result of a planned foreign military sale not materializing and delay in the AH-64C development program. The cost of a production break would exceed the cost of continued low-rate procurement. Accordingly, the Congress recommended authorization of $77.6 million to procure 6 AH-64A aircraft for FY95.
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