4. INSPECTION PROCEDURES.
a. Inspect the installed ejector for concentration of soot indicating a leak. Note that a bad tadpole
seal at the engine inlet may also cause soot in the engine compartment. Special attention should
be given to the bottom of the exhaust plenum since a leak here could corrode through the bottom
of the compartment and the top of the fuel tank.
b. Look down the flu to see if any of the 17-plenum outlet tubes are missing.
a. Any exhaust ejector that is leaking, or has missing outlet tubes is to be replaced with a new
b. This TB authorizes replacement of the current exhaust installation on any AGPU exhaust
assemblies if the using unit wants to upgrade the performance of their AGPU.
c. Replacement of the original unmodified ejector and inlet tube assemblies is recommended
whenever the assemblies are removed for any other maintenance.
6. CORRECTION PROCEDURES.
a. Refer to TM 55-1730-229-34, Section IV, Paragraph 2-9a, and Figure 2-2, Removal and
Installation of Major Components. Remove components as necessary to get access to the
exhaust ejector assembly.
b. Remove the exhaust ejector assembly from the AGPU.
c. Plug 1/4-inch diameter hole in the nipple connecting the surge valve with a 5/16 self-tapping screw
(P/N MS51851-106) and Lock Washer (P/N MS35338-45).
(1) Inspect installation area. Remove all signs of corrosion or rust. Touchup paint if required.
(2) Inspect two silicone rubber strips. Ensure that the two rubber strips and washers are in
position over the eight front studs (furthermost from the engine). Remove washers and rubber
strip from the other rear four studs.
(3) Remove assembly from shipping skids but leave shipping blocks installed inside the flu to
assist in installation. Install a hoisting strap into and around the front side of the flu, centered
between the shipping blocks.
(4) Carefully lift, holding the flu portion of the assembly. Lower the assembly into position on the
AGPU floor over the front eight studs.
(5) Remove shipping blocks from inside the flu and slide the deflector out from under flu to check fit
with the mounting flange on the engine.