TB 1-1520-238-20-139
5.4. When the aircraft is converted to the new PMD and 25 hours/14 days inspection interval, make an entry
on DA Form 2408-15 stating "The PMD and 25 hours/14 days inspection interval implemented at (today's
date) and current aircraft hours".
6. SPECIAL INSTRUCTIONS.
NOTE
The 20--hour strap pack borescope inspection will move to a 25 hours in-
spection interval. This inspection will not be part of the 25 hours/14 days
PMS inspection. This inspection is an hour requirement only, not a calendar
requirement.
6.1. All items listed in previous Safety of Flight (SOF) messages, Aviation Safety Action Messages (ASAM),
Technical Bulletins (TB), TM 1-1520-238-PMS, TM 1-1520-238-23-1 and TM 1-1520-Longbow/Apache
requiring 10 flight hours/14 days, or 20 flight hour inspection interval; will be changed from 10 flight hours/14
days to 25 flight hours/14 days. The 25 flight hours inspection interval (PMS) along with the PMD will replace
the 10 flight hours inspection interval on all forms and records, technical manuals, previous technical bulletins,
and messages.
6.1.1. All existing or future inspections required at less than the 25 flight hours inspection interval will appear
under the "Special Inspections" section in TM 1-1520-238-23-1 and TM 1-1520-Longbow/Apache and must
be listed on the DA Form 2408-18.
6.2. All items listed in previous Safety of Flight (SOF) messages, Aviation Safety Action Messages (ASAM),
Technical Bulletins (TB), TM 1-1520-238-PMS, TM 1-1520-238-23-1, and TM 1-1520-Longbow/Apache
requiring 250 flight hours Phase Maintenance inspections will extend this inspection interval to 500 flight
hours except as listed below in paragraph 7.
6.2.1. All existing or future inspections required at less than the 500 flight hours inspection interval will appear
under the "Special Inspections" section in TM 1-1520-238-23-1 or TM 1-1520-Longbow/Apache and must
be listed on the DA Form 2408-18.
7.1. The following listed inspections will require changes to TM 1-1520-238-23-1 and TM 1-1520-Longbow/
Apache. The inspections are common to both the AH-64A and AH-64D with the exception of the Environmen-
tal Control System (ECS), the old style non stainless AH--64A Main Landing Gear, and AH--64A BUCS Flight
Control System inspection.
7.2. The following listed inspections will require change on the DA Form 2408-18.
NOTE
This Technical Bulletin is the authority to implement/update TM
1-1520-238-23-1 and TM 1-1520-Longbow/Apache SPECIAL INSPEC-
TIONS until the changes to these manuals are published by The Army's
Publishing Directorate (APD).
7.3. Change 10 Hours/14 Days inspection to 25 Hours/14 Days PMS.
7.3.1. Add 25 Hour/14 Days requirement. Inspect 4 EFAB and 2 Crew Compartments filters for AH--64D only.
Replace as required.
7.4. Add 50 Hour Main Rotor Controls Inspection.
NOTE
The dash number following the Inspection Area refers to the section/area
in the phase manual the inspection is extracted from.
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