TB1--1520--251--20--07
3. TAMMS Reporting Compliance Suspense Date. Report compliance IAW paragraph 14a(1) NLT 22
May 2002.
4.
Summary of the Problem.
a. History-- SOF AH--64--02--05 was issued to remove flight restrictions imposed by SOF
AH--64--00--08 (TB 1--1520--251--20--01). The purpose of the SOF was to inspect for the installation of sus-
pect High Power Switching Modules (HPSM), and for the installation of MWO 1--1520--251--55--07. Further
investigation revealed additional HPSM's that must be considered suspect. With the addition of these sus-
pect HPSM's, it is possible some aircraft released from the flight restrictions imposed IAW AH--64--00--08 may
still be at risk.
NOTE
After receipt of this TB and until 31 Jan 03, commanders will notify the POC in paragraph 16b
after control exchange of a GCU to ensure proper tracking of MWO 1--1520--251--55--06 ap-
plication.
b. For manpower/downtime and funding impacts, see paragraph 12.
c.
The purpose of this TB is to:
(1) Revise the serial number listing of suspect HPSM's in paragraph 8a.
(2) Identify and replace suspect HPSM's.
5.
End Items to be inspected. All Army AH--64D aircraft.
6.
Assembly Components to be Inspected.
NOMENCLATURE
PART NUMBER
NATIONAL STOCK NUMBER
HPSM #1
7--511B11087--1
6110--01--425--7230
(IP 386SUE1)
HPSM #2
7--511B11088--1
6110--01--425--7231
(IP 387SUE1)
7.
Parts to be Inspected.N/A.
8.
Inspection Procedures.
a. Determine if the inspection required IAW AH--64--02--05 has been completed. If the inspection has
been completed, inspect for additional HPSM's listed below prior to next flight. If the inspection required IAW
AH--64--02--05 has not been completed, conduct the inspection concurrently with this message prior to the
next flight. Read the HPSM #1 and #2 data plates located behind the pilots seat to determine if one of the
suspect serial numbers listed below is installed. If one is installed, prior to removal contact the LOG POC
in paragraph 16b for replacement instructions.
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