TM 55-1510-215-MTF
SECTION IV. SPECIAL PROCEDURES
General. This section contains the special procedures that were
referenced in section II.
*A.
Cushion Check. The secondary idle stop check shall include
the cushion check (if applicable).
*B.
Health Indicator Test (HIT) (figure 4) - Perform as follows:
NOTE
The HIT provides a go-no-go condition check prior to
takeoff. HIT is performed after completing the
ENGINE RUNUP check, when both engines are
warmed and instruments stabilized. Test one engine
at a time. Adjust engine N1% to the N1% value
shown in the ITT log (figure 4) for a FAT value which
most closely matches the FAT on the free air
temperature gage. After comparing indicator - read
ITT with the proper log-given baseline ITT, the
difference number is recorded in the log space
provided. Appropriate actions depend upon the size
of the difference number.
(1)
Face aircraft into wind and insure that deice system is OFF.
(2)
Set both engines at LO IDLE.
(3)
Read free air temperature.
4-1
