Aircraft continually age in service periods
while in the custody of an operating command
with the following exceptions:
l Due to special rework at the depot site
l Due to storage while in operating com-
mand physical custody that requires special prior
approval by CNO
. Due to commencement of ASPA inspec-
tions or modifications
Aircraft time accumulated in nonaging
situations in excess of 30 days, or a multiple
thereof, requires the submission of an XRAY
report. A nonaging record is maintained in
the aircraft logbook. Refer to table 6-6 for
information concerning XRAY status codes which
require nonaging entries.
Whenever it becomes definitely known that an
aircraft, because of its condition or a directive,
will be returned for rework or retirement before
completing the full standard service, the PED
must be changed to the last month in which the
aircraft will serve in the current tour. A revised
end date must be reported by XRAY message.
Every change in the predicted PED must be
reported by XRAY message even though no other
reportable actions occur.
If extensions are granted on the service or
period of an aircraft, the PED is not changed.
The PED is properly a past date when the aircraft
is on an extension.
Some aircraft subject to SDLM will serve in
period a specified number of months or be flown
a specified number of hours. The period ends after
either reaching the prescribed number of months
or flying hours, whichever occurs first. Upon
receiving the aircraft, the operating unit develops
the PED by using the prescribed calendar month
limitation, unless the expected use rate indicates
an earlier period end date.
Since flying hours have an important bearing
on the PEDs of aircraft subject to SDLM, the end
dates must be reviewed periodically. If it appears.
that the total flying hours prescribed for each
period will be reached sooner than the end date
previously predicted, a new end date must be
computed based on the past average rate of flying.
The new end date must be reported by XRAY
Item Iextension number. The first extension
authorized by the controlling custodian or the
number of any additional extension authorized
by the Chief of Naval Operations is entered for
this item. The initiation of an extension requires
an XRAY report even though no other reportable
action occurs. Action code X is used to describe
the initiation of extensions. The number in this
item pertains to extensions of the current tour or
period only. Extensions granted on second or
subsequent periods are renumbered starting with
the number 01 in each period.
Item Jstrike/damage code. If the action
being reported involves the strike or damage of
aircraft, the four-character strike/damage code
describing the circumstance is entered in item J.
NOTE: Strike is the official action that
removes an aircraft from the list of Navy aircraft.
See table 6-7 for strike and damage codes.
Four categories are used to describe the main
reasons for which an aircraft can be stricken.
Category 5 is used for substantially damaged
aircraft that are repairable. Each of these
categories necessitates separate administrative
procedures. These categories are discussed in the
Category 1damage. An aircraft is stricken
in category 1 if it is lost or damaged to such an
extent that its restoration to serviceability would
be uneconomical or militarily impractical. This
category is the one most often used by operating
Category 2depreciation. An aircraft is
stricken in category 2 if it has depreciated by time
and usage to such an extent that its restoration
to serviceability would be uneconomical or
militarily impractical. Only the Naval Air Systems
Command, with approval of the Chief of Naval
Operations, may declare an aircraft eligible for
category 2 strike; therefore, operating activities
are not involved in striking aircraft in category 2.
Category 3administrative. An aircraft is
stricken in category 3 when it is stricken by
the Chief of Naval Operations for special
administrative reasons and not by reasons of
damage, depreciation, or completion of full
standard service life. This category includes strikes
because of model obsoleteness, excess to Navy
required diversion to ground
training or technical use, transfer to non-Navy
recipients, intentional destruction in test or