(a)
Remove the engine driven (hydraulic fluid) pump (EDP)
(AMM 29-11-05/401).
(b)
Remove the fluid from the empty space between the EDP and the gearbox pad.
(c)
Remove the EDP drive oil seal from the drive pad in the gearbox (AMM 72-61-07/401). 1) Examine the condition of the EDP drive oil seal. 2) Examine the condition of the packing which seals the
support of the EDP drive oil seal to the gearbox.
NOTE: Deterioration of these packing seals is a sign that
____ the engine oil can have contamination by hydraulic fluid.
3) With radial and axial movements of the drive spline, examine the drive shaft bearings.
NOTE: A loose drive spline is a sign that there is a
____ bearing problem which must be corrected before subsequent flights.
4) Install the drive oil seal for the EDP with a new packing (AMM 72-61-07/401).
NOTE: Use a new drive oil seal if the original one had
____
corrosion.
5) Install the EDP (AMM 29-11-05/401).
NOTE: If the EDP is damaged, you must replace the EDP.
____
6) Do the step below to Put the Oil System Back to a Serviceable Condition.
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72-00-00
ALL ú ú N01 Page 658 ú Feb 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
No. 8 - Oil System Contamination Inspection
___________________________________________
I. Examine the Oil for Contamination from Jet Fuel.
S 286-210-N00
(1)
Examine for contamination from jet fuel if one or more of the items
that follows is true.
(a)
You smell jet fuel in the oil.
(b)
There was too much oil in the oil tank.
(c)
There is an indication of high oil temperature.
S 286-209-N00
(2)
Examine the oil for contamination from jet fuel.
(a)
Examine the viscocity of the oil.
1) Compare the viscosity of the oil sample with the viscosity of a sample of the same type of oil that has no contamination (Refer to the PW SB 238 for the oil quality limits).
NOTE: If the viscosities are very different, the oil
____ will possibly have contamination by jet fuel or hydraulic fluid.
S 906-208-N00
(3)
If you found contamination from jet fuel, do the steps that follow:
(a)
Remove the fuel/oil cooler (AMM 79-21-01/401).
(b)
Examine the fuel/oil cooler.
(c)
Repair or replace the fuel/oil cooler as necessary.
(d)
Do the step below to Put the Oil System Back to a Serviceable Condition.
J.
Put the Oil System Back to a Serviceable Condition.
S 846-207-N00
(1)
Do the steps that follow to put the oil system back to the usual
condition.
(a)
Drain the oil system (AMM 12-22-02/301).
(b)
Flush the oil system (AMM 12-22-03/301).
(c)
Fill the oil system (AMM 12-22-03/301).
(d)
Start the engine and operate it at minimum power until the temperature of the oil is more than 150°F (65.5°C) (AMM 71-00-00/201).
(e)
Increase the speed to 1.35-1.40 EPR and then operate the engine at minimum power. 1) Do this step four more times.
(f)
Operate the engine at 1.35 to 1.40 EPR for ten minuntes.
(g)
Do the engine shutdown procedure (AMM 71-00-00/201). 1) Remove the magnetic chip detector from the engine oil tank (AMM 79-21-10/401).
2) Install the PWA 86018 adapter in the hole from which the chip detector was removed.
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