The PMD, and 25 hours/14 days PMS will not be implemented until suffi-
cient quantities of TM 1-1520-238-PMD or TM 1-1520-251-PMD, TM
1-1520-238-PMS updated to reflect the increase interval to 25 hours/14
days, are on-hand to ensure each individual aircraft receives a copy of the
inspection checklist. The PMD and the 25 hours/14 days PMS will be imple-
This technical bulletin is the authority for all references to the 10 hours/14
days inspection listed in TM 1-1520-Longbow/Apache, under Aircraft Gen-
eral Maintenance, Inspection, Schedule Inspection to be changed to read
25 hours/14 days. The current 10 hours/14 days preventive maintenance
inspection interval listed in the Interactive Electronic Technical Manual
(IETM) is not a printed technical manual, therefore no paper copy of the new
General Information and Scope area of the inspection procedures will be
The 500 hours PM will be implemented as directed below. The Phase In-
spection Checklist dated, October 2004, will be utilized for both 250 hours
and 500 hours inspections.
5.1. The PMD will be implemented as follows:
5.1.1. When the aircraft receives a copy of TM 1-1520-238-PMD or TM 1-1520-251-PMD, the PMD will be
entered IAW DA PAM 738-751.
5.1.2. The PMD entry will be cleared when the Preventive Daily Inspection is performed in accordance with
TM 1-1520-238-PMD or TM 1-1520-251-PMD, TM 1-1500-328-23 and DA PAM 738-751. The PMD may be
accomplished at the completion of the last flight of the mission day or prior to the first flight of the mission day
as directed by TM 1-1500-328-23 and Local Unit SOP.
5.2. The 25 hours/14 days PMS will be implemented as follows:
5.2.1. At the completion of the next scheduled 10 hours/14 days PMS and when the aircraft receives a copy
of the new PMD manual (airframe specific), update the DA Form 2408--18 Equipment Inspections List for the
increase interval to 25 hours.
5.3. The 500 hours PM will be implemented as follows:
5.3.1. The 500 hours PM will be implemented after the completion of a RESET Inspection, or remanufacture
(REMAN) or an even numbered (i.e. #2 or #4) phase in the current 1000 hours cycle. If an aircraft completed
a Phase #1 or #3 the next phase is due 250 hours from the completion of the last phase.
5.3.2. An example of when the 500 hour interval will start is: If the last phase completed on an aircraft was
a Phase #4 at 1498.7 aircraft hours, the next phase due will be 500 hours from that time or 1998.7 aircraft
5.3.3. If an aircraft just completed a Phase #1 at 738.1 aircraft hours, the next phase will be a Phase #2 due
at 988.1 aircraft hours. At the completion of the Phase #2 at 988.1 aircraft hours, the next phase due will then
be 500 hours from that time or 1488.1 aircraft hours.
5.3.4. When the aircraft is converted to the new 500--hour phase inspection interval, make an entry on DA
Form 2408--15 stating "the 500 hour phase inspection interval implemented at (todays date) and current