TM 55-2840-231-23
1-72. Health Indicator Test (HIT) - Continued
AIRFRAME/Continued
4. Verify the HIT Baseline
TOT values.
Verify Baseline HIT Values when corrective
action is taken to bring the HIT TOT Log
Value back in tolerance with Baseline TOT
Values. [Refer to Troubleshooting Procedure
No. 59. High Health Indicator Test (HIT)],
verification of the Baseline TOT is required.
NOTE
If variations between actual TOT and
Baseline TOT Values are within
acceptable tolerance, then the
Baseline TOT Values are verified,
(3) Install both HIT
TOT Logs in the aircraft
logbook, and retain the
Adjusted HIT TOT Work
Sheet with the engine
historical records.
Discard
only after the completion
of the next successive HIT
TOT Baseline.
a. Perform a normal HIT
check in accordance with
instructions on the HIT
Log.
b. Compare actual HIT
TOT Value with Baseline
HIT TOT Value.
c. If variations are not
acceptable, perform an
Engine Performance
Check to ensure proper
engine operationlhealth
and establish a new HIT
TOT Baseline.
Change 11
1-158.3/(1-158.4 blank)
