TEMPORARY REVISION - MD Helicopters

More documents

Recommendations

Info

CSP−H−2MD Helicopters, Inc.500 Series − Basic HMI(b). Install the two screws, two bolts andnut and washers that secure thedrain assembly to the structure,shroud and scroll.NOTE: Do not overtighten the two bolts andnut. Torque to 10 inch−pounds (1.13 Nm)maximum.(c). If drain assembly is a replacement,connect the flexible drain hose andsecure with two wraps to lockwire (2,Table 2−4).C. Main Transmission CoverDifferent main transmission covers are usedwith the shaft−driven and belt−driven oilcooler blower installations. The main transmissioncover is a polycarbonate plastic formthat essentially matches the transmissionhousing contour. The plastic form has apermanently bonded insulation blanket coverwith a fiberglass core and flexible vinylexterior. Plastic form gaskets cushion the coversurfaces that mate with the adjacent structure.When installed, there is space betweenthe cover and transmission to allow inlet airflow for transmission cooling. With theshaft−driven blower, a yoke−type drainassembly fits around the lower end of thecover. A flexible hose connects to the drainassembly outlet tube and pipes overboard anywater or oil that collects in the cover.(1). Removal (Shaft−Driven Blower):(a). Detach the main transmission drainassembly.(b). Release nylon tape edging (Velcrohook tapes) from mating nylon pilefasteners (Velcro piles) at aft edges ofcover.(c). Remove four screws and washersfrom cover.(d). Remove bolt from heater duct flangeat lower left aft inside corner of coverif heating system ducting is installed;then lower cover to remove it..(2). Inspection (Shaft−Driven Blower):Inspect foam gaskets and cover blanketfor deterioration and plastic cover forcracks.(3). Installation (Shaft−Driven Blower):(a). Position cover over transmission.(b). Install heater duct bolt at lower leftaft inside corner of cover if heatingsystem ducting is installed.(c). Install the four screws and washersfingertight. Check cover for proper fitand that liquid level plug is visible.(d). Tighten screws.(e). Set the nylon tape edging to themating file fasteners by using handpressure.(f). Attach the main transmission drainassembly.(4). Removal (Belt−Driven Blower):(a). Disconnect electrical wiring fromtransmission temperature sensor andchip detector.NOTE: The cover assembly may be installedwith sealant. To remove the cover, split thesealant with a sharp knife to protect sealsand surface finish from damage.(b). Remove 14 washers and screws toremove cover from fuselage structure,trim support strips and uppertransmission baffle.(c). Remove cover from left and rightcooling ducts.(5). Installation (Belt−Driven Blower):(a). Apply parting agent (113, Table 2−4)and sealant (106) to areas indicatedin Figure 2−6.(b). Position cover over transmission andinstall cooling ducts.(c). install 14 screws and washers tosecure cover and trim support strips.(d). Connect electrical wiring to transmissiontemperature sensor and chipdetector.Page 2−40TR09−001
MD Helicopters, Inc.500 Series − Basic HMICSP−H−2D. Main Transmission Cover AssemblySeals Replacement(Ref. Figure 2−7) Cover seals PN369H8063−85, 89, and −91 in the369H8063−505 polycarbonate type maintransmission cover assembly may be removedon a one time basis for inspection, andreinstalled using a rubber adhesive to ensureadequate bond between the seals and thepolycarbonate cover. This procedure, whichfollows, does not apply to 369H8097 fiberglasstype main transmission cover.(1). Remove main transmission coverassembly.(2). Remove 369H8063−85, −89 and −91rubber seals from cover assembly.Discard seal if any deterioration isnoted.(3). Use X−acto knife or equivalent toremove loose adhesive material adheringto polycarbonate cover and rubberseals. Use abrasive paper to removeremaining adhesive residue from coverand seals.(4). Abrade inside flange of rubber seals.(5). Wipe clean the abraded areas of coverand seals, using naphtha and cleancloth.(6). Apply adhesive (3, Table 2−4) to bothrubber seal and cover assembly. Alignseals and press into place.(7). Allow bond to cure for 24 hours;reinstall cover assembly.E. Cargo Compartment Aft Bulkhead AccessCoversThe cargo compartment aft bulkhead accesscovers enclose essentially symmetricalopenings to the fuselage spaces at either sideof the engine air inlet plenum chamber. Theright side cover provides access to the oil tank,oil cooler and oil system drain valve. The leftside cover provides access to elements of thecabin heating installation on the helicopters soequipped. Turnlock fasteners secure the outeredge of each cover to the fuselage.(1). Removal: Release turnlock fastenersand lift cover from structure.(2). Inspection:(a). Inspect turnlock fasteners andreceptacles for condition.(b). Inspect cover for corrosion andcracks.(3). Installation: Position the cover over theopening in the structure and engage theturnlock fasteners.369H8063−85 SEAL369H8063−91 SEAL369H8063−89 SEALMAIN TRANSMISSIONCOVER ASSEMBLY30−216Figure 2−7. Main Rotor Transmission Cover Seals InstallationPage 2−41TR09−001
Page 6: CSP−H−2MD Helicopters, Inc.500
Page 9 and 10: MD Helicopters, Inc.500 Series −
Page 14 and 15: CSP−H−2MD Helicopters, Inc.500
Page 28 and 29: CSP−H−2ItemNo.Material11 Paint
Page 30 and 31: CSP−H−2ItemMaterialNo.31 Insula
Page 90: CSP−H−2MD Helicopters, Inc.500

TEMPORARY REVISION - MD Helicopters

Create successful ePaper yourself

Delete template?

Save as template?