D. Allow engine oil to drain to slow drip for approximately 1/2 hour. Install main oil drain plug and standpipe cavity drain plug and connector in bottom of accessory drives gearbox housing. Lockwire plugs.
E. Close oil tank drain valve on bottom of tank.
F. Install main oil strainer element in strainer port of accessory drives gearbox. Install strainer cover and secure with washers and locknuts. Refer to P&WA Chapter 72, Engine.
CAUTION: BE SURE STRAINER ELEMENT IS INSTALLED RIGHT SIDE UP. WHEN CORRECTLY INSTALLED, THE STRAINER BYPASS VALVE WILL BE AT THE COVER END OF THE ELEMENT.
G. Remove self-locking filler cap from port in sump cavity and fill oil tank to center of upper sight gage with new oil. Replace oil tank filler cap and install, or close, cowl panels.
CAUTION: INSECURE INSTALLATION OF THE OIL TANK FILLER CAP MAY OCCUR IF INTERNAL STOPS ARE WORN PERMITTING INCORRECT LOCK ROTATION.
CHECK FOR PROPER LUG ENGAGEMENT AFTER CAP IS INSTALLED AND LOCK HANDLE IS TURNED TO "CLOSE" BY ATTEMPTING TO REMOVE CAP. (PULL STRAIGHT OUT ON HANDLE BY HAND OR WITH A WIRE HOOK AS SHOWN IN FIGURE 301.) WHEN STOWING LOCK HANDLE, CHECK THAT MACHINED SURFACE OF HANDLE IS TURNED UP AND AS-CAST SURFACE IS DOWN TOWARD CAP. PROPERLY LOCKED AND STOWED, THE LOCK HANDLE PRESENTS A SMOOTH FLAT SURFACE THAT IS FLUSH WITH THE CAP.
NOTE: If the engine oil supply was changed from one type of oil to another, operate engine at idle rpm for at least 1 minute. After engine shutdown, drain and service the system per steps A, B, D, E, and G.
When the engine is operated for the first time after an oil change, check the oil supply tank level after engine shutdown and replenish as required. Refer to Chapter 12, Servicing.
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79-00 Page 302 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Nov 15/70
H29465
500 Checking Oil Tank Filler Cap Installation
Nov 15/70 Figure 301 79-00
Page 303
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
ENGINE OIL STORAGE - DESCRIPTION AND OPERATION
P&W 79-11-1 page 1 Aug 01/79
1. General
A. Each engine is provided with a cylindrically shaped oil tank which mounts on the left front face of the accessory drive gearbox and is secured at the front by a strap. With the engines installed on the airplane, the tank holds approximately five U.S. gallons. The remaining tank volume accommodates foaming and expansion of the oil.
2. Engine Oil Tank
A. The tank is constructed of stainless steel and is capable of withstanding without permanent deformation, the stresses imposed by pressure, vibration, and shock loads such as can occur during landing, rough flight conditions, etc. A baffle serves to minimize sloshing of the oil in the tank. A deaerator in the tank separates most of the air from the returning oil, thus minimizing foaming.
B. Servicing of the oil tank is accomplished through a filler port, located in a sump cavity. When servicing through the filler port, any oil that is spilled in the sump cavity is drained through tubing to drain holes in the cowl panels.
C. For ground check of oil quantity, a dipstick is attached to the self-locking filler cap. A capacitance sensing probe in the tank transmits an electrical signal for remote indication of oil quantity during flight.
D. The tank is equipped with an inlet strainer at the filler port. An outlet strainer is located at the drain valve on the underside of the tank.
508
May 15/68 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 79-11-0 Page 1
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