CABIN CONTROLLER

TM 1-1510-223-MTF

10.

Continue climbing and ensure that the ALT WARN annunciator

light illuminates between 12,000 and 12,500 feet

11.

CABIN PRESS DUMP switch - OFF.

12.

CABIN CONTROLLER - Set to 0 feet.

13.

Continue climbing to between 15,000 and 16,000 feet. As the

altitude cabin descends to 0 feet, ensure that the ALT WARN

annunciator extinguishes prior to 9,000 feet cabin altitude.

14.

CABIN CONTROLLER RATE knob - Set to minimum. Monitor

the cabin rate of climb for a rate of less than 200 feet per

minute.

15.

CABIN CONTROLLER RATE knob - Set 1 to 3 o'clock

position. Monitor the cabin rate of climb for a rate of 350 to 650

feet per minute.

16.

CABIN CONTROLLER RATE knob - Set to maximum. Monitor

the cabin rate of climb for a rate of 1500 to 2500 feet per

minute.

17.

Cabin altimeter - Check that the cabin altimeter needle stabilizes

and remains at -250 to +250 feet until the maximum differential

pressure of 6.5 +.I PSI is reached. At this point (approximately

15,300 feet pressure altitude), verify that cabin altitude

increases and differential pressure remains constant.

18.

With the cabin at maximum differential pressure, place both

ENVIRO & PNEU BLEED AIR switches to PNEU ONLY. As the

cabin differential pressure decreases from 6.1 to 5.7 PSI, the

cabin rate of climb shall not exceed 2200 feet per minute.

19.

ENVIRO & PNEU BLEED AIR switches - ON and re-establish

maximum differential pressure.

20.

Left ENVIRO & PNEU BLEED AIR switch - PNEU ONLY.

21.

Slowly retard the right POWER lever to flight idle and determine

the minimum N. required to maintain cabin pressure. Verify that

cabin pressurization is maintained down to flight idle NI.

22.

Left ENVIRO & PNEU BLEED AIR switch - ON.

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