(b)
Examine the filter element for the oil supply filter (AMM 79-21-03/401).
(c)
Examine the filter element for the scavenge oil filter (AMM 79-21-04/401).
(d)
Do the troubleshooting procedure to find and correct the cause of the low oil pressure (AMM 71-00-44/101).
(e)
If the above inspections are satisfactory and the cause of the low oil pressure has been corrected, return the engine to service.
(f)
If the above inspections are not satisfactory, replace the engine (AMM 71-00-02/401).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
PSID
KPaDIFF
A 737-300/400/500MAINTENANCE MANUAL
1.
MAXIMUM NORMAL GROUND OIL PRESS
2.
MINIMUM NORMAL GROUND OIL PRESS
3.
MINIMUM NORMAL FLIGHT PRESSURE
//////////////////////// / /
CFM56 ENGINES
/ / ////////////////////////
700
600
500
400
300
200
100
0
OIL PRESSURE
THE ENGINE MUST BE
THIS AREA SHUT DOWN WHEN THE OIL PRESSURE IS LESS THAN THE MINIMUM ACCEPTABLE PRESSURE S-M56-MM-1022-(1)-00-B
Oil Pressure Out-of-Limit Inspection Requirements Figure 612
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
Engine Operations Above the Limits and High Engine Stress Inspection
_____________________________________________________________________
S 816-071-C00
(2) If the pressure is in zones B or C, do the troubleshooting procedure to find and correct the problem (AMM 71-00-44/101).
J. Engine Windmilling
S 816-072-C00
(1) If the lubrication system is in operation before an in-flight
shutdown, there is no time limit for windmilling.
S 816-073-C00
(2) If the engine windmills for more than 6 hours without the operation
of the lubrication system, do these steps.
NOTE:____ If the engine windmills after the fire switches have been
closed, make an inspection of the engine-driven hydraulic
pump (EPD) for possible damage.
(a) Examine these components for unwanted material.
1) The magnetic chip detectors (AMM 79-21-05/201).
2) The oil supply filter (AMM 79-21-03/401).
3) The scavenge oi filter element (AMM 79-21-04/401).
(b) Do a power assurance check (AMM 71-00-00/501, Test No. 5).
(c) Examine the magnetic chip detectors again (AMM 79-21-05/201).
S 816-074-C00
(3) If you cannot start the engine in 24 hours, do the engine dry-out
procedure (AMM 71-00-03/201).
K. High Scavenge Oil Temperature
S 816-075-C00
(1) If the scavenge oil temperature is more than 165°C or is more than 160°C for more than 15 minutes, do these steps:
(a)
Change the engine oil (AMM 12-13-11/301).
(b)
Examine the lubrication unit for unwanted material on these components: 1) Magnetic chip detectors (AMM 79-21-05/201) 2) Magnetic plug of the oil tank (AMM 79-00-00/601) 3) Filter element for the oil system filter (AMM 79-21-03/401) 4) Filter element for the oil scavenge filter
(AMM 79-21-04/401).
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