Procedure
1
Time Limited Inspection Requirements
Table 6 Time Limited Inspection Requirements
Task number
Item Name
Task Description
Interval
Data Module Refer-
ence
00-00/45
Aircraft
Do the corrosion and
corrosion protection
inspections
AMM 12-
B-20-40-00-00A-901
A-A
12-B-20-40-00-00A-
901A-A
21-30/46
MSN 1001-1719 -
Cabin positive pres-
sure relief
Functional test
4,800 FH / 48 Months 12-B-21-30-00-00A-
903A-A
21-30/466
MSN 1720-9999 -
Cabin pressurization
positive pressure re-
lief valve
Task replaced by
21-30/314
-
-
21-30/467
MSN 1720-9999 -
Cabin pressurization
negative pressure re-
lief valve
Examine
4,800 FH / 48 Months 12-B-21-30-05-00A-
310A-A
21-40/51
Overtemperature
switch
Functional test
4,800 FH / 60 Months 12-B-21-40-06-00A-
903A-A
21-40/52
Duct overtemperature
switch
Functional test
4,800 FH / 60 Months 12-B-21-60-05-00A-
903A-A
21-50/58
Vapor cycle compres-
sor motor (if installed)
Inspection/check
500 Operating hours 12-B-21-50-03-00A-
313A-A
21-50/59
Vapor cycle compres-
sor motor drive belt (if
installed)
Check for tension
500 Operating hours 12-B-21-50-01-00A-
903A-A
21-50/433
Vapor cycle compres-
sor condenser mod-
ule (including motor)
(if installed)
Clean, refer to
OSCMM
Initially at each
scheduled inspection,
then based on field
experience the inter-
val can be adjusted
to a more effective
level
-
21-50/461
Vapor cycle compres-
sor motor (CCM P/N
959.90.22.140, if in-
stalled)
Inspection/check
600 Operating hours 12-B-21-50-03-00A-
313A-A
21-50/462
Vapor cycle compres-
sor motor drive
belt (CCM P/N
959.90.22.140, if in-
stalled)
Check for tension
600 Operating hours 12-B-21-50-01-00A-
903A-A
24-30/339
Ni-Cad batteries
Remove and service 400 FH / 12 Months
12-B-24-30-07-00A-
920B-A
12-B-24-30-07-00A-
920C-A
and CMM
PC-12/47E AMM Doc No 02300, ISSUE 01 REVISION 26 MSN 545, 1001-1719,
1721-1999
12-B-AM-00-00-00-I
UNCLASSIFIED
Effectivity: All
12-B-05-10-20-00A-281A-A
UNCLASSIFIED
2021-12-04 Page 4