MD Helicopters 369 Series, Manual

Page: 31 / 110

CSP−HMI−2
MD Helicopters, Inc
.
MAINTENANCE MANUAL
04−00−00
Page 13
Revision 39
FAA APPROVED
(8) Inspect main rotor drive shaft every 300 hours (Ref. Sec. 63 − 10 − 00, Main Rotor Drive Shaft Inspection
(300 Hour)) (Reference AD 81 − 26 − 01).
(9) Failsafe device, P/N 369D25530 bolt and 369D25531 socket, must be used at both ends of tail rotor
driveshaft in accordance with Tail Rotor Drive Shaft Installation with Bendix Couplings (Reference AD
86 − 20 − 07).
(10) For helicopters equipped with a cargo hook, inspect overrunning clutch sprag assembly P/N 369D25351,
clutch inner race P/N 369A5353 and outer race 369A5352 every 300 hours (Ref. C.O.M., Sec. 63 − 10 − 10,
Overrunning Clutch Sprag Inspection (300 Hour)). To establish time in service, either clutch total time with
hook attached or a separate and permanent log of external load operating time per CFR 91.417, may be
used.
(For 369D/E/F/FF helicopters with 369A5364 or 369D25351 sprag assembly, Refer to AD 90 − 19 − 02.)
(11) Inspect main rotor blade root fittings and main rotor lead − lag link assemblies every 25 hours in accordance
with Main Rotor Blade Upper and Lower Root Fitting Attach Lug and Lead − Lag Link Attach Lug Inspection
(25 Hour) and every 100 hours in accordance with Main Rotor Blade Upper and Lower Root, Fitting Attach
Lug and Lead − Lag Link Attach Lug Inspection (100 Hour) (Ref. Sec. 62 − 10 − 00) (Reference AD 95 − 03 − 13).
(12) Tip plates, tip weights (where applicable) and attaching hardware have no retirement life and may be
reused on replacement horizontal stabilizers.
(13) 421 − 087 − 903 and − 905 require addition of tip plates, tip weights and attaching hardware before
installation.
(14) Inspect the three upper slot bridges for cracks (Ref. Sec. 05 − 20 − 00).
(15) Inspect main rotor drive shaft every 300 hours (Ref. Sec. 63 − 10 − 00, Main Rotor Drive Shaft Inspection
(300 Hour)).
(16) Inspect for deterioration every 600 hours up to a total time of 4200 hours and every 300 hours thereafter
until deterioration is sufficient to retire assembly
369D/E/FF − 500N: (Ref. Sec. 62 − 20 − 00, Main Rotor Damper and Attachments Inspection)
600N: (Ref. Sec. 62 − 20 − 60, Main Rotor Damper and Attachments Inspection).
(17) For helicopters equipped with a cargo hook, inspect overrunning clutch sprag assembly P/N 369F5456,
clutch inner race P/N 369F5455 and outer race 369F5453 every 300 hours. To establish time in service,
either clutch total time with hook attached or a separate and permanent log of external load operating time
may be used.
(18) 500N7113 − 11 tube assembly, fan pitch is an On − Condition part and replaces the 500N7113 − 3 tube
assembly.
(19) Interim hours: life extension testing in progress.
(20) Inspect upper and lower blade root fittings every 100 hours in accordance with Main Rotor Blade Upper
and Lower Root, Fitting Attach Lug and Lead − Lag Link Attach Lug Inspection (100 Hour) (Ref. Sec.
62 − 10 − 00)
(For 369D/E/F/FF − 500N helicopters, Reference AD 96 − 10 − 09).
(21) Main rotor blades, P/N 369D21102 − 517 with S/N 1976 thru 2100, 2106 thru 2115 are not to be installed on
600N helicopter (Reference Service Bulletin SB600N − 007R2) (Reference AD 98 − 15 − 26).
(22) Inspect main rotor blades with 600 or more hours of operation every 25 hours of helicopter operation with a
10X magnifying glass for cracking of the lower surface of the blade emanating from the root fitting and
doubler at the inboard end of the blade and to detect debonding between the blade root end fitting and
doubler if missing or cracked adhesive or paint is observed. (Reference Service Bulletins SB369D − 195R3,
SB369E − 088R3, SB369F − 075R3, SB500N − 015R3) (Reference AD 98 − 15 − 26).
(23) Perform Main Rotor Blade Upper and Lower Root, Fitting Attach Lug and Lead − Lag Link Attach Lug
Inspection (25 Hour) up to a total time of 500 hours and every 15 hours thereafter and every 100 hours in
accordance with Main Rotor Blade Upper and Lower Root Fitting, Attach Lug and Lead − Lag Link Attach
Lug Inspection (100 Hour) (Ref. Sec. 62 − 10 − 00) until retirement of 369H1203 − BSC and − 21 Lead − Lag
Link Assembly. (Reference AD 95 − 03 − 13).
(24) Inspect clutch retainer and bearing carrier for evidence of spinning and/or wear (Ref. Sec. 05 − 20 − 20).