TM 1-1520-238-T-4
Change 8
6–82.13
6–19.2. HOD NGB 1 READING – DISPLAYS HIGH OIL TEMPERATURE
6–19.2
Tools:
Nomenclature
Part Number
Tool Kit, Electrical
SC518099CLA06
Repairer’s
Personnel Required:
67R
Attack Helicopter Repairer
152FG
Maintenance Test Pilot
References:
TM 1-1520-238-23
Equipment Conditions:
Ref
Condition
TM 1-1520-238-23
Access provisions –
L200 access panel and
LN6 fairing open.
WARNING
Components may be hot enough to
cause burns. If injury occurs, seek
medical aid immediately.
1. Check other HOD oil temperature readings.
Are all readings relatively the same with
none >130 C?
YES
Readings are normal for
operating environment.
Go to paragraph 6–13.
NO
Go to step 2.
2. Check HOD NGB 1 oil pressure display.
Is pressure in normal range (55 – 85 LB)?
YES
Go to step 3.
NO
Go to Task 6–15.3.
3. Visually inspect NGB 1 oil system for low oil
level and damage (TM 1-1520-238-23).
Is damage present?
YES
Replace NGB 1
(TM 1-1520-238-23).
Go to paragraph 6–13.
NO
Go to step 4.
4. Inspect NGB 1 cooling fins and driveshaft
shrouds for dirt or blockage.
Is dirt or blockage present?
YES
Clean cooling fins and driveshaft
shrouds (TM 1-1520-238-23).
Go to paragraph 6–13.
NO
Replace NGB 1 oil temperature
transducer (MT15)
(TM 1-1520-238-23). Go to
paragraph 6–13.
END OF TASK
