Table 3-1. Operator's Preventive Maintenance Checks and Services.
Item
No.
Daily Interval
Item to be inspected
Procedure
Reference
B
D
A
01
Insecticide sprayer
Perform pre-light check
2-1
02
X
Pump assembly
Do not allow to run dry
2-7c
X
3-3d
2-7e
03
X
Insecticide sprayer
Perform post flight check
1
B = before operation; D = during operation; A = after operation.
Table 3-2. Operator's Troubleshooting Chart.
Malfunction
Probable cause
Corrective action
1. Booms noticeably vibrate or misalign in
Cable tension out of adjustment.
Land aircraft and adjust tension (4-
flight
3a (7)).
2. Leak develops in system during flight.
Faulty fluid system components.
Apply pump brake; stop operations
(2-7d).
3. Use of pump causes vibration.
Fan blade damaged, or pump
Apply pump brake; stop operations
(2-7d).
bearings faulty.
Cancel mission; return to base (2-
4. No response to start spray command.
a. Loose connection or connector on
7d).
control valve.
b. Inlet or outlet couplings split.
Cancel mission; return to base (2-7d).
Stop pump at once using pump
brake(2-7d).
5. No response to stop spray command.
Loose connection or connector on
control valve.
a. Brake cable or cable connector
6. Spray intermittent.
See footnote at end of table.
loose.
b. Faulty windmill drive on pump.
See footnote at end of table.
a. Contamination in spray nozzle.
7. Spray uneven
See footnote at end of table.
b. Faulty pump.
See footnote at end of table.
c. Boom tee strainer clogged.
See footnote at end of table.
For intermittent or uneven spray, record condition for service. Depending upon severity of condition, complete or
discontinue mission.
3-2
