MIL-F-81738 Flare, Aircraft, Parachute, Mk 45 Mod 0This specification covers the manufacture and preparation for delivery of the Flare, Aircraft, Parachute, MK 45 Mod 0, the MK 45 Aircraft Parachute Flare and Drogue Tray, and the methods of examination and tests upon which product acceptance shall be based. The flares or Mk 45 drogue trays are a delay type flare, designed for launching from aircraft, which produce a parachute suspended illuminating candle. The flare or Mk 45 drogue tray is classified as Class B Explosives \(Code of Federal Regulations 49 CFR 71-78\) ad IIC Explosive \(Coast Guard Rules and Regulations for Military Explosive and Hazardous Munitions CG 108\).

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MIL-F-81738 (AS)

4.2.1 Components, assemblies and materials examinations. Prior to final assembly,

all components, assemblies and materials used in the flare or Mk 45 drogue tray shall

meet the requirements of 3,2.1.

4.2.1.1 Fuze (M101 ). In the absence of previous inspection of the fuze, inspection

shall be performed as specified in Specification AS 1179. (See 6.2)

4.2.1,2 Primer (M102). In the absence of previous inspection of the primer,

inspection shall be performed as specified in Specification MIL-P-20444.

4.2.1.3 Detonator (M103). In the absence of previous inspection of the detona-

tor, inspection shall be performed as specified in Specification MIL-D-18665.

4.2.2 Flare examinations (Cl). Examinations shall be made to ascertain that the

flares meet the requirements of the NAVAIR drawings listed on PL 2141527, Only

flares containing no defective classified characteristics shall be used for further testing

or returned to the lot,

4.2.3 Mk 45 drogue tray examinations (C2). Examinations shall be made to

ascertain that Mk 45 drogue trays meet the requirements of PL 2127899. Any Mk 45

drogue tray containing no defective classified characteristics shall be used for further

testing or returned to the lot.

4.2.4 Packing and marking examinations (C3). The packing and marking exam-

ination shall be as specified in the applicable drawings as listed in Section 5. Only

packs containing no defects shall be returned to the lot.

4.3 Tests. Random samples of flares or Mk 45 drogue trays shall be selected,

tested and accepted as specified in 4.1.1 or 4.1.2, as applicable.

4.3.1 Performance tests.

4.3.1.1 Sealing test (M104). The flare shall be tested in a water tank equipped

for observation under vacuum. The water temperature shall be 45 degrees F minimum

to 75 degrees F maximum.

The water tank should be equipped so that the flare

CAUTION:

must be raised above the water level while still under

vacuum before releasing the vacuum and removing

the flare.

The uppermost surface of the flare, when in a horizontal position, shall be submerged

4 to 6 inches below the water surface and subjected to a vacuum of 6.0 � 1.0 inches of

mercury (24 inches of mercury absolute pressure) for a minimum period of 60 seconds.

Leakers are indicated by air bubbles issuing from the flare. Do not mistake the escape

of occluded air for leakage. Flares which are not defective may be used for further

testing or returned to the lot. Defective are flares failing to meet the requirements of

3.3.1.1.