TM 1-1510-224-MTF
CHAPTER 4. SPECIAL
PROCEDURES
4-1. GENERAL. This chapter contains the special procedure that were
referenced in Chapter 2.
*PRESSURIZATION
1.
Before takeoff:
(a)
CABIN CONTROLLER - Set for a 5000 foot cabin altitude.
(b)
CABIN CONTROLLER RATE knob - Set to the 1 to 3
o’clock position.
(c)
ENVIRO & PNEU BLEED AIR valve switches (2) - ON.
(d)
CABIN PRESS DUMP switch - OFF.
2.
After takeoff - Initiate a climb to 10,000 to 12,000 feet pressure
altitude.
3.
Cabin rate-of-climb indicator - Monitor for a smooth transition
from an unpressurized to a pressurized cabin.
4.
CABIN CONTROLLER RATE knob - Set to minimum. Monitor
the cabin rate of climb for a rate of less than 200 feet per
minute.
5.
CABIN CONTROLLER RATE knob - Set 1 to 3 o’clock position.
Monitor the cabin rate of climb for a rate of less than 200 feet
per minute.
6.
CABIN CONTROLLER RATE knob - Set to a maximum.
Monitor the cabinet of climb for a rate of 350 to 650 feet per
minute.
7.
Cabin altimeter - Check that the cabin altimeter needle
stabilizes at 4600 to 5400 feet while the cabin differential
pressure needle continues to increase.
8.
CABIN CONTROLLER - Set to 10, 000 feet.
9.
CABIN PRESS DUMP switch - DUMP, when cabin altitude
approaches aircraft altitude.
4-1
