TERMINATION DATE

August 31, 2006

PROBLEM

Bellow balance tubes leak exhaust gas on certain 3508B exhaust manifold groups.

AFFECTED PRODUCT

PARTS NEEDED

ACTION REQUIRED

See the attached Rework Procedure.

SERVICE CLAIM ALLOWANCES

Product smu/age whichever comes first

Parts

PARTS DISPOSITION

Attach. (1-Rework Procedure)

1. Remove exhaust heat shield section surrounding the bellow balance tube at the front of the engine.
2. Remove the 4 x 9L7373 Bolts, 4 x 3E6916 Nuts, and 8 x 1108314 Washers that retain the old bellow balance tube components.
3. Remove the 1 x 2224704 bellow balance tube and 2 x 1230319 Seal O-rings.
4. Clean the sealing surfaces of the exhaust manifold mating surfaces.
5. Install new 1230319 Seal O-rings.
6. Install new 2722498 Bellow As.
7. Install new 9L7373 Bolts, 3E6916 Nuts, and 1108314 Washers.
8. Start the engine and inspect joints to ensure there are no exhaust leaks.
9. Shut down the engine and install the exhaust heat shield that was removed in step 1.

Illustration 1