TO:  ALL AIRWAYS FACILITIES DIVISION MANAGERS

ATTN:  AIRWAY FACILITIES SECTOR MANAGERS

SUBJ:  MODE S NATIONAL STOCK NUMBER UPDATE FOR ENROUTE MODE S FACILITIES

TWX:  TWX-MODE-9005

DATE:  12/13/99

THIS NOTICE IS FOR ALL MODE S ENROUTE FACILITIES ONLY

AOS IS IN THE PROCESS OF UPGRADING ENROUTE MODE S FACILITIES TO SOFTWARE 
VERSION SAE010A.  THIS MODIFICATION CONSISTS OF FIRMWARE AND SOFTWARE 
CHANGES AS INSTRUCTED IN SSM-MODES-007, AND CONSISTS OF NEW NATIONAL 
STOCK NUMBERS.  THE UPGRADE WILL BE PERFORMED BY AOS-260 PERSONNEL .

LISTED BELOW ARE THE NSN'S FOR THE HARDWARE CONFIGURATION IN BOTH THE 
INTERROGATOR AND DPS IN THE EVENT OF A FAILURE:

NSN                DESCRIPTION           

5998-01-456-2925   CCA, CD-2 MCDI
5998-01-456-2926   CCA, CPU 68020 FEI 
5998-01-456-2932   CCA, CPU INTF FEI 
5998-01-456-2940   CCA, LARDR DPS
5998-01-456-2945   CCA, LAMNT DPS
5998-01-456-2948   CCA, LASUR DPS
5998-01-456-2949   CCA, LASMT DPS
5998-01-456-2950   CCA, LACOM DPS
5998-01-432-4002   CCA, CPU/IOP/MPU 40 DPS
5998-01-456-2933   CCA, ITRI DPS   
5998-01-447-6599 IATCRBS BOARD (CCA 114) FEI

THESE ITEMS ARE NOT INTERCHANGEABLE WITH THE CONFIGURATION FOR 
TERMINAL MODE S SITES WHICH USE SAR214J SOFTWARE.

IF YOU HAVE ANY ADDITIONAL QUESTIONS REGARDING THIS MESSAGE, PLEASE 
CONTACT DANIEL TRONGONE, AOS-260, ON (609)485-HELP.



JAMES PRICHARD
MANAGER, NATIONAL AIRWAYS 
  SYSTEMS ENGINEERING DIVISION, AOS-200