TESTING (Cont)

TM 10-1670-265-12&P

T.O. 13C7-1-21

4-17. ASPSU - Test (Cont)

4-17

TESTING (Cont)

2. Operational test procedures (Cont).

c. Testing (Cont).

(6) The IGN CHECK red light (9) should be on. This verifies that the cutter ignition circuit is complete.

(7) If the IGN CHECK fails to light the cutter is bad and must be replaced. To remove the ASPSU from the

tester, proceed to step d. Replace unserviceable cutter and repeat paragraphs 4-16 and 4-17.

(8) Observe altimeter and FIRE indicator (10). Place ALT. DECR. switch (11) to up position, read and record

the altitude at which the FIRE indicator lights. If the FIRE indicator lights within following tolerances, it may be used.

Dz Firing Altitude

Fire Altitude Tolerances

9,900 feet

±250 ft.

9,000 feet

±250 ft.

7,000 feet

±250 ft.

5,000 feet

±250 ft.

3,500 feet

±150 ft.

1,000 feet

±150 ft.

Further readings as follows, are required to assure that the bellows are adjusting to various barometric pressure changes.

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