TB 1--1520--240--20--146
Assembly Components to be Inspected. --
PART NUMBER
NATIONAL STOCK NUMBER
NOMENCLATURE
ROTOR HEAD ASSEMBLY
145R2003 -- ALL
ALL
ROTOR HEAD ASSEMBLY
145R2004 -- ALL
ALL
TIE BAR ASSEMBLY
114R2155-1
7.
Parts to be Inspected. --N/A.
Inspection Procedures.
NOTE
Due to the possibility of handling damage, tie bar assemblies that were
previously rejected during compliance with SOF CH-47-02-03 due to fail-
ing the inspection requirements of TM 55-1520-240-23, Task 5-23.1.1
(H-47D/F), or TM 1-1520-252-23, Task 5-31, (MH-47E), for other than
cracks and/or deformed washers, shall be disposed of in accordance
with paragraph 10D.
NOTE
Read and complete all paragraph 8 inspcetion procedures for each part
prior to proceeding to the correction procedures in paragraph 9.
a. Utilizing the inspection results of CH-47-02-03 (TB 1-1520-240-20-141), paragraph 8a, proceed as
follows --
(1) If TSN is less than 4800 hours --
(a) Change the rotor head DA Form 2408-16 to indicate a new retirement life for the tie bar
assembly of 4800 hours TSN.
(b) Clear the red horizontal dash //--// entry required in accordance with paragraph 1a(1) of
this Technical Bulletin and enter a new red horizontal dash //--// status symbol with the following state-
ment: "Inspect all tie bar assemblies in accordance with paragraph 8b, CH-47-02-05 (TB
1-1520-240-20-146) at the next rotor head removal, but no later than the next phase inspection or 25
January 2004."
NOTE
Rotor heads which have zero hours time since overhaul (TSO) or
zero hours time since new (TSN) do not require inspection of the
tie bar assemblies in accordance with paragraph 8b.
(2) If TSN is equal to or greater than 4800 hours, correct in accordance with paragraph 9.
NOTE
Aircraft that were inspected in accordance with CH-47-02-03 (TB
1-1520-240-20-141) do not require re-inspection in accordance with
b. At the next rotor head removal, but no later than the next phase inspection or 25 January 2004,
whichever occurs first, inspect the tie bar assemblies as follows --
(1) Remove tie bar assemblies in accordance with TM 55-1520-240-23, Task 5-23.1 (H-47D/F)
or TM 1-1520-252-23, Task 5-30 (MH-47E).
NOTE
The procedure in paragraph 8b(2) is only for the inspection of tie bar as-
semblies for cracked plates and deformed or cracked washers. The tie
bar assembly will be inspected per TM 55-1520-240-23 (H-47D/F), or TM
1-1520-252-23 (MH-47E), at the next horizontal hinge pin rotation. The
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