MIL-STD-801 Inspection And Acceptance Standards For Fuel Cells And FittingsThis standard establishes a test method standard for fuel cells and fuel cell fittings. This standard applies to all fuel cells manufactured in accordance with MIL-DTL-5578, MIL-DTL-6396 except Type I, and MIL-DTL-27422.

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Item

Defects

Defect Classes

Types of Fuel Cells/Location

Fittings

Minor

Major

Critical

Bladder

Cells

Self- sealing Cells

Crash Resistant Cells

Cell

Interior

Cell

Exterior

Installed

Replacement

18

LAP SPLICE EDGE LOOSENESS (Except for liner laps)

a. Up to 1/8 inch in width and 3 inches long; no more than 1 per 5 linear feet and rework can be made by trimming

x

-

-

x

x

x

x

x

-

-

b. In excess of 18a. or if rework can be made by trimming

-

x

-

x

x

x

x

x

-

-

19

OUTER PLY CUTS OR SPLITS PARALLEL TO CORDS, IF CORDS ARE NOT DAMAGED

x

x

(See

Note)

-

x

x

x

-

x

-

-

20

LOOSENESS UNDER HANGER FITTINGS INCORPORATING METAL OR FABRIC PLATES OR METAL RINGS, IN ExCESS OF THE CONTACT SURFACE AREA OF THE PLATES AND RINGS AND UP TO 1/4 INCH BEYOND OUTER EDGE OF PLATE OR RING

-

x

-

x

x

x

x

x

x

-

21

BLISTERS IN FLANGE AREA OF REPLACEMENT FITTINGS

-

x

-

-

-

x

-

-

-

x

22

MOLD MARKS IN FLANGE: AREA OF FITTING

a. No interference with design characteristics of fitting

x

-

-

x

x

x

x

x

x

x

b. Sufficient to cause interference

-

x

-

x

x

x

x

x

x

x

23

FLOW CRACKS, LAMINATIONS, POROUS AREAS OR BACK RINDS IN ExCESS OF 1/2 BODY THICKNESS OF FITTING FLANGE AT LOCATION OF DEFECT

x

x

x

x

x

x

x

x

24

FOREIGN MATERIAL IN FITTING FLANGE

a. 1/32 inch or less

x

-

-

x

x

x

x

x

x

x

b. Over 1/32 inch but less than 1/2 body thickness at defect

-

x

-

x

x

x

x

x

x

x

25

TEARS IN FITTING FLANGE

a. If fairing can be accomplished while still maintaining specified minimum flange width

x

-

-

x

x

x

x

x

x

x

b. In excess of 25.a.

-

x

-

x

x

x

x

x

x

x