5-33. CABIN PRESSURE LIMITS.
Maximum cabin differential pressure is 6.1 PSI.
5-34. CRACKED CABIN WINDOW/WINDSHIELD.
If a crack occurs in both the inner and outer plys of
a cabin window, the aircraft cannot be flown, except to be
ferried to a maintenance facility for replacement of the
If a crack occurs in either layer of a cabin window,
the aircraft can only be flown in unpressurized flight.
For further information on cracked cabin
Instruction No. C-12-0117.
If there is a crack in only the outer ply of the
windshield, unpressurized flight may be conducted
provided that the following procedures and restrictions are
1. Cracking must not significantly impair visibility of
objects outside the aircraft.
2. Cracking must not interfere with the use of the
3. The heating elements must be operative.
If there is a crack in the inner ply of the windshield,
the windshield must be replaced prior to the next flight, to
prevent injury to the pilots from possible glass splinters.