SECTION II TM5-4520-253-23P (1) (2) (3) (4) (5) (6) ITEM SMR PART NO CODE FSCM NUMBER DESCRIPTION AND USABLE ON CODE (UOC) QTY GROUP 06 HEAT EXCHANGER FIG. 18 HEAT EXCHANGER AND SHIELDS 1 PAFZZ 92878 3050 SCREW,SELF-LOCKING WITH LOCK WASHER 8 2 XBFZZ 92878 168025 EXCHANGER COVER,  REAR 1 3 PAFZZ 92878 3050 SCREW,SELF-LOCKING WITH LOCK WASHER 4 4 PAFZZ 92878 68072 GASKET 1 5 PBZO 92878 2-168676 EXCHANGER,HEATER  ASSEMBLY 1 6 XBFZZ 92878 168126 INSULATOR,HEAT  EXCHANGER 6 7 PAFZZ 96906 MS20600-AD6W4 RIVET,BLIND  STRUCTURAL PULL STEM 4 8 XBFZZ 92878 168248 STRAP,SUPPORT 2 9 XBFZZ 92878 168053 FELT,MECHANICAL,PRE 1 10 PAFZZ 96906 MS20600-AD6W4 RIVET,BLIND 4 11 XBFZZ 92878 168247 RETAINER,SHIELD 4 12 XBFZZ 92878 168052 SHIELD,HEATER CASE 2 13 PAFZZ 96906 MS20600-AD6W4 RIVET,BLIND STRUCTURAL PULL STEM 4 14 XBFZZ 92878 168248 STRAP,SUPPORT 2 15 PAFZZ 96906 MS20600-AD6W4 RIVET,BLIND STRUCTURAL PULL STEM 1 16 PAOZZ 96906 MS35206-263 SCREW,MACHINE  PAN HEAD 1 17 PAOZZ 96906 MS35335-32 WASHER,LOCK  EXTERNAL TOOTH 1 18 PAOZH 96906 MS21333-100 CLAMP,LOOP 1 19 PAOZZ 96906 MS35649-262 NUT,PLAIN,HEXAGON  #6-32 1 20 XBFZZ 92878 168248 STRAP,SUPPORT 1 21 XBFZZ 92878 168229 INSULATION,SHIELD 1 END OF FIGURE 18-1