BELL HELICOPTER 430, Maintenance Manual

Page: 33 / 186

BHT-430-MM-2
5-00-00
9 SEP 2011 Rev. 18 Page 5 ECCN EAR99
of these items is the responsibility of the owner/
operator.
5-5. DEFINITIONS
• Examine — Look carefully to find the condition of
the component. Find how that condition relates to
a specific standard.
• Condition — The state of an item as related to a
known standard.
• Security — The presence of attaching parts that
are properly tightened or appear to be, and the
presence of properly installed (as required)
locking devices such as lockwire, cotter pins, or
other.
• Standard — A specific rule or measurement that
you use to find the condition of a component.
• Damage — Physical deterioration of a
component.
• Discard — Reject a component that has damage
that cannot be repaired. To permanently remove
from service.
• Inspection — A procedure that includes checking,
inspecting, and examining a system or
component.
• Non scheduled inspection — An inspection that
has not been scheduled.
• Periodic inspection — An inspection which is
repeated at equal time intervals.
• Progressive inspection — A scheduled inspection
that is divided into smaller segments. This makes
the best use of the time and resources available.
• Maintenance — The servicing and/or the repair of
a helicopter, a system, or a component that keeps
it serviceable.
• Preventive maintenance — To do small
maintenance action(s) on a regular basis to
prevent non scheduled maintenance.
• Operating time — Actual flight or calendar time
that must be recorded in the Historical Service
Records or in the helicopter logs. The operating
time is defined as:
– Time in service (flight time) — The measured
time which starts the moment the helicopter
leaves the ground until it touches the ground
at the next point of landing. The time when the
helicopter is on the ground, with the engine
and the rotor turning, is not included.
– Calendar time — The elapsed time which
starts on the day the inspection is completed,
the component is installed, or the rotor turned
for the first time and ends on the last day of
the month that the time limit expires. Calendar
time is continuous. Calendar time does not
stop when you remove a component, put the
helicopter in storage, etc.
• Maintenance zone — A specified area of the
helicopter which may contain more than one
system or more than one group of related
components. Maintenance zones (
Figure 5-1 ) are
used when you do a progressive inspection.
• Lead-The-Fleet (LTF) Program — This is a
program designed to validate the performance of
an approved product improvement or a change to
a maintenance interval. The engineering aspects
of this change are approved. The program is
closely monitored by Bell Helicopter Textron in an
operational environment with selected operators.
• Special Programs — These are approved
programs that may be initiated under certain
special conditions to meet specific requirements.
These programs will be clearly defined through a
plan and the engineering and maintenance
aspects will be approved by the regulatory
authorities.
5-6. INSPECTION AND OVERHAUL
TOLERANCE
WARNING
DO NOT APPLY THESE TOLERANCES
T O PA R T S W I T H A L I M I T E D
AIRWORTHINESS LIFE (CHAPTER 4).