Sometimes, a change or bulletin is not the
complete answer to a problem, and it is necessary to
amend or revise a current directive.
An amendment clarifies, adds to, deletes from,
makes minor changes to, or cancels an existing
technical directive. It only supplements the existing
directive and not a complete directive in itself. A
maximum of three amendments may be applied to a
TD, each remaining in effect until rescinded or
superseded. A requirement for further amendment
action requires the issuance of a revision.
A revision is a completely new edition of the
existing directive. It supersedes the original directive
or revision and all existing amendments.
In this section, rescissions, supersedures,
cancellations, and amendments are discussed.
A rescission is the process by which TDs are
removed from active files after requirements have
been incorporated. Final rescission action is directed
in NAVSUP 2002. Activities maintaining active
technical libraries should maintain the TDs on file
until they are deleted from the NAVSUP 2002 index.
A supersedure is the process by which interim
changes are removed from active files after a formal
TD has been issued.
A cancellation is the process by which a TD is
removed from the active files. A TD is canceled if it
is determined that a previously issued TD is not to be
incorporated. TDs are canceled by an amendment to
the TD. The cancellation explicitly states the required
configuration of each article initially specified for
modification; for example, whether installed
modifications are to remain installed or whether they
are to be removed.
TD TITLES AND NUMBERING
There are many title subjects of changes and
bulletins. A few example titles are as follows:
Power Plant (PPC, PPB)The last letter
identifies the TD as a change (C) or bulletin (B)
Avionics (AVC, AVB)
Aviation armament (AAC, AAB)
Support equipment (SEC, SEB)
Airborne weapon (AWC, AWB)
Accessory (AYC, AYB)
The following are examples of the numbering
Aviation Armament Change No. 537
Support Equipment Change No. 1299
F- 14 Interim Airframe Change No. 261
F- 14 Interim Airframe Bulletin No. 111
The numbering system is a consecutive numerical
application. For example, Avionics Change 204 would
be the 204th avionics change issued.
The numbers assigned to changes and bulletins are
provided by the Technical Directive Control Center,
which is located at the Naval Air Technical Services
Facility (NATSF). Changes or bulletins that have been
amended will have their basic number followed by the
words Amendment 1, Amendment 2, etc. A
revised directive will have the basic directive number
followed with the words Rev. A. Rev. B, as
appropriate, to denote the first or second revision to
that basic directive.
The changes and bulletins are automatically
distributed to the concerned activities. All TDs are
issued by NAVAIR or NATSF, except in cases where
the time delay in obtaining approval is unacceptable.
In such cases, the controlling custodians are
authorized to issue interim TDs to prevent
unacceptable risks to personnel or equipment. The
changes or bulletins are generally based on contractor
service bulletins, other letters of recommendations, or
proposed modifications from field service activities.
TECHNICAL DIRECTIVE CATEGORIES
Technical directives are assigned a category
according to the importance and urgency of
accomplishing the work involved. A category of
immediate, urgent, routine, or record purpose is
assigned to each technical directive.
Immediate action TDs are issued when an
uncorrected, unsafe condition exists that could result
in fatal or serious injury to personnel, or extensive
damage to or destruction of valuable property. These
unacceptable risks require immediate action to either
ground aircraft, prevent launch of missiles, or deny use
of related support equipment or munitions.