AERONAUTICAL EQUIPMENT
General. Aeronautical routine sampling intervals are provided below. For variation from the listed
sampling intervals and additional sampling requirements, see Section 6 (When to Sample).
Rotary Wing
Sampling Interval
Aircraft
Component
Days
Designation
Model
Hours
AH-64A
25
Main Transmission
25
100
APU
0
50
Hyd Sys 1
0
50
Hyd Sys 2
AH-64D
25
Main Transmission
25
100
APU
0
50
Hyd Sys 1
0
50
Hyd Sys 2
CH-47D
50
Engine (T55-L712/714) (2)
50
Engine Mech Transmission (2)
50
Combining Transmission
50
Forward Transmission
50
Aft Trans
100
APU
100
50
Hyd Sys 1
100
50
Hyd Sys 2
100
50
Hyd Sys Util
CH-47F
50
Engine (T55-L712/714) (2)
50
Engine Mech Transmission (2)
50
Combining Transmission
50
Forward Transmission
50
Aft Transmission
100
APU
100
50
Hyd Sys 1
100
50
Hyd Sys 2
100
50
Hyd Sys Util
EH-60A
Physical Properties Only
500
Main Transmission (-073, -074, -076 only) 3 micron filter
50
Main Transmission (all others)
35
Intermediate Gearbox
35
Tail Gearbox
100
APU
EH-60L
Physical Properties Only
500
Main Transmission (all)
35
Intermediate Gearbox
35
Tail Gearbox
100
APU