BHT-412-MM-2
5-00-00
Export Classification C, ECCN EAR99
Refer to the applicable Pratt & Whitney Canada
Engine Maintenance Manual for inspection and
overhaul tolerances.
The following provides examples of when hourly,
calendar, or hourly/calendar inspection tolerances
have been applied:
Hourly Example (10% or up to a maximum of 100 hours, whichever is less):
300-HOUR
INSPECTION
DUE AT:
MAXIMUM ALLOWED
TOLERANCE
INSPECTION CARRIED
OUT AT:
NEXT 300-HOUR
INSPECTION
DUE AT:
3400 Hours 10% of 300 hours = 30 hours 3430 Hours
(10% tolerance applied)
3730 Hours
3730 Hours 10% of 300 hours = 30 hours 3750 Hours
(within 10% tolerance)
4050 Hours
4050 Hours 10% of 300 hours = 30 hours 4050 Hours
(tolerance not applied)
4350 Hours
Calendar Example (10% or up to a maximum of 30 days calendar time, whichever is less):
12-MONTH
INSPECTION
DUE ON:
MAXIMUM ALLOWED
TOLERANCE
INSPECTION CARRIED
OUT ON:
NEXT 12-MONTH
INSPECTION
DUE ON:
June 10, 2010 10% of 12 months = 1.2 months
(maximum allowed is 30 days)
July 8, 2010
(within 30 day tolerance)
July 31, 2011
July 31, 2011 10% of 12 months = 1.2 months
(maximum allowed is 30 days)
June 15, 2011
(completed early)
June 30, 2012
June 30, 2012 10% of 12 months = 1.2 months
(maximum allowed is 30 days)
June 30, 2012
(tolerance not applied)
June 30, 2013
NOTE:
The last day of the month applies for the next inspection (paragraph 5-3B, calendar time).
7 NOV 2016 Rev. 25 Page 6A
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