79-11 Fanwheel-to-Inlet Gaps (continued)
B. Trimming Inlets
1. Refer to Figure 79-2. Remove hardware securing F305-5 inlets to F236-1 scroll
assembly.
2. If inlets are slotted, carefully twist inlets over F196-1 fan shaft and remove inlets.
If inlets are not slotted, remove hardware securing fan shaft to C947-3 plate
assemblies, noting hardware removed, and remove inlets.
3. Refer to Figure 79-2, Detail A. Trim inlets as required to meet minimum fanwheel-
to-inlet gap. Do not exceed minimum inlet dimensions.
4. Refer to § 20-70. Smooth inlet edges and coat bare metal with primer. Touch-
up primed area using dark gray Dupont Imron polyurethane enamel in accordance
with paint manufacturer’s recommendations.
5. If inlets are slotted, carefully twist inlets over fan shaft and install hardware
securing inlets to scroll assembly (slot orientation is optional). Verify security.
6. If inlets are not slotted, install inlets around fan shaft and install hardware securing
inlets to scroll assembly. Verify security. Install hardware securing fan shaft to
plate assemblies, standard torque hardware per § 20-32, and torque stripe per
Figure 5-1.
7. Measure fanwheel-to-inlet gaps per Part A. Repeat procedure as required for
minimum 0.10 inch gap at forward and aft inlets.
79-20 Oil Tank Assembly
A. Removal
1. Drain engine oil per § 12-60.
2. Remove tailcone cowling assembly per § 53-23; open main gearbox access door.
3. Air-conditioned ships: Recover refrigerant per § 12-81. Using backup wrench,
disconnect G794-2 & G794-3 hose assemblies from G810-1 & G811-1 line
assemblies; cap fittings.
4. Refer to Figure 79-3. Remove D277-8 clamp or cut and discard safety wire securing
A729 tube to G689-1 tank assembly scupper drain. Pull tube off of drain.
5. Disconnect airframe harness from MS28034-1 oil temperature sender.
6. Disconnect F723-1, F723-3, and F723-4 line assemblies from oil tank and associate
components; cap fittings.
7. Remove nuts securing tank to firewall.
8. Remove hardware securing tank to F384-3 angles and remove tank through access
door.
APR 2017 Chapter 79 Engine Oil System Page 79.5
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