TB 1-1520-240-20-90
(1) P/N 145D3400-23, NSN 1615-01-113-0248, serial numbers - A-2012 and A-6334.
(2) P/N 145D3400-25, NSN 1615-01-113-0292, serial number - A-4906.
(3) P/N 145D3400-32, NSN 1615-01-112-5897, serial numbers -
A-283
A-6292
A-8302
A-2142
A-6922
A-8386
A-3352
A-7044
b. If the records check is inconclusive or identifies a suspect serial number, perform a visual inspection of the
component identification (data) plates as follows.
(1) Prepare the aircraft for safe ground maintenance.
(2) Open the drive shaft tunnel access covers. (Refer to TM 55-1520-240-23, Task 2-2 and TM 55-1520-252-
23, Task 2-2).
(3) Check the forward synchronizing drive shaft assembly data plates for any of the above suspect serial
numbers.
c. If any of the drive shafts serial numbers are in the above list of suspect serial numbers, call the ATCOM logistical
point of contact (paragraph 16c below) for disposition instructions before proceeding to paragraph 9 below for corrective
procedures.
d. If the drive shaft serial numbers are not in the above list of suspect serial numbers, no further action is required.
Close the drive shaft tunnel covers, and record and report compliance with this TB in accordance with paragraph 14
below.
9. Correction Procedures.
a. Remove the suspect forward synchronizing drive shaft assembly.
(Refer to TM 55-1520-240-23 Tasks 6-2
through 6-4, and TM 1-1520-252-23 Tasks 6-2 through 6-4 as applicable).
b. Return the suspect forward drive shaft assembly to CCAD IAW the disposition instructions in para 10d below.
c. Reinstall a forward synchronizing drive shaft assembly. (Refer to TM 55-1520-240-23 tasks 6-17 through 6-19
and TM 1-1520-252-23 tasks 6-18 through 6-20 as applicable).
d. Close the drive shaft tunnel access covers. (Refer to TM 55-1520-240-23, Task 2-2 and TM 55-1520-252-23,
Task 2-2).
e. Perform ground run. (Refer to TM 55-1520-240-10/TM 1-1520-252-10).
10. Supply/Parts and Disposition.
a. Parts Required. CCAD will rework discrepant drive shaft assemblies. The ATCOM logistical POC for this recall
is delineated in para 16c below.
b. Requisitioning Instructions. When a suspect shaft listed in para 8a is found, contact the ATCOM POC for
requisition instructions. The unit can continue to fly for up to five days, until receipt of a new drive shaft whichever
occurs first. The unit will provide shipping information to ATCOM and receive 100 percent credit for the drive shaft.
Upon receipt of the replacement drive shaft, the unit will change it immediately.
c. Bulk and Consumable Materials. N/A
d. Disposition. Return discrepant drive shaft assemblies IAW the instructions of the ATCOM logistical POC (para
Commander,
Corpus Christi Army Depot (CCAD)
Attn: SIOSS-QP-RA
Corpus Christi, Texas 78419-5260
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