TM 10-1670-287-23&P   0048 00 0048 00-4 (6)  Any canopy which has a span differential that falls below the corresponding lower limit or exceeds the upper limit should be deemed unacceptable and will be immediately and permanently removed from service. NOTE This canopy scoring technique is intended to determine airworthiness/non-airworthiness of RAPPS canopies.  In general, this technique will alert the unit level rigger to the existence of traits that have been observed in non-airworthy canopies.  Armed with this information, the rigger can decide to closely monitor the performance of such canopies or remove them from service altogether.  This will reduce the number of reserve activations necessitated by failure of the main to inflate. d.    Procedure number 4.  Rating the Canopy’s Airworthiness: (1)  Conduct the following scoring procedure to obtain an overall rating for the canopy’s airworthiness.  This scoring procedure is intended only for canopies that successfully met the criteria in procedures a. through c., above. CRITERIA SCORE 1. The average top surface nose permeability is: a.     12.0 cfm or greater 0 points (Not Airworthy) b.     10.0 cfm to 11.99 cfm 1 point c.     8.0 cfm to 9.99 cfm 2 points d.     0.0 cfm to 7.99 cfm 3 points 2. Top/bottom surface span differential is within the “Desired Range”? (procedure #3) 3 points 3. For each cell, the top surface span is within the“Desired Range”? (procedure #2) ½ point/cell 4. For each end cell, the top surface span is within the “Desired Range”? (procedure #2) ½ point/end cell 5. Average top surface cell span is within the “Desired Range”? (procedure #2) 1 point 6. Total the number of points, which the canopy has received.  Locate the canopy’s score on the appropriate canopy-scoring chart (Figs. 2,3) to determine its degree of airworthiness.