This document discusses condition-based maintenance (CBM). CBM allows potential failure conditions to be detected early enough to safely manage the consequences. It does not prevent failure, but provides time to address issues like landing an aircraft or replacing a part before further damage occurs. The key factor for determining CBM task intervals is the potential failure-to-failure (P-F) interval, which is the time from when failure is first detectable to when it actually occurs. CBM is powerful because it allows impending failures to be identified before they happen, providing time for proactive actions to control the consequences of failure.

1. 5
CBM
FACTS
Nancy Regan
POWERFUL

2. CBM allows a Potential Failure
Condition to be detected in
enough time to manage the
Consequences of Failure.
01
CBM doesn't prevent failure.
Condition-Based Maintenance

3. A hydraulic system
warning light is heeded
that allows enough time
for the pilot to land the
aircraft safely.
Condition-Based Maintenance
or...
for example:

4. A vibration signature is
detected in enough time to
order a new bearing and
scheduled maintenance so
that operations isn't
adversely affected.
for example:
Condition-Based Maintenance
or...

5. Low oil level is
discovered so that the
reservoir can be
replenished before the
engine is damaged.
for example:
Condition-Based Maintenance

6. 02
What is the P-F Interval?
how often a cbm task is done
is based on the p-f interval
Condition-Based Maintenance

7. The time from when a Potential
Failure Condition is detectable
to the point that failure occurs.
The p-F interval
Condition-Based Maintenance

8. The p-F interval
Condition-Based Maintenance

9. Simple example to figure out
how often to check calibration
Condition-Based Maintenance

10. In this example, the calibration
must be checked at intervals less
than 6 months in order to detect
the Potential Failure Condition.
Condition-Based Maintenance

11. How often something fails or the
criticality of failure does not
dictate how often a CBM task is
performed.
CBM
Condition-Based Maintenance
03

12. CBM
When it comes to CBM task
intervals, what matters is how
quickly failure occurs once the
Potential Failure Condition is
detectable.
Condition-Based Maintenance
04
The P-F Interval

13. CBM is powerful because it
allows impending failure to be
identified before the failure
occurs so that proactive
action can be taken in enough
time to manage the
consequences of failure.
CBM
Condition-Based Maintenance
05

14. In other words, maintenance is
performed on your terms –
and you can stop "running
from fire to fire!"
CBM
Condition-Based Maintenance