Garrett TPE331 Fuel Manifold & Nozzle Assembly Overhaul Manual 73-10-16

Description

File Details

• Manual type: Component overhaul manual with illustrated parts list
• Brand / manufacturer: Garrett Engine Division, Allied-Signal Aerospace Company
• Component: Fuel manifold and nozzle assemblies
• Document number: Report No. 73-10-16
• Original revision dated: March 5, 1986; this issue is Revision No. 9, dated April 26, 1989
• Language: English
• File format: PDF
• Page count: 135 pages

Chapters Covered

• Description and Operation
• Disassembly
• Cleaning
• Inspection/Check
• Repair
• Assembly
• Fits and Clearances
• Testing
• Trouble Shooting
• Storage Instructions
• Special Tools, Fixtures and Equipment
• Illustrated Parts List

This Garrett TPE331 Fuel Manifold & Nozzle Assembly Overhaul Manual 73-10-16 is a complete shop-floor document for the primary and secondary fuel manifold and nozzle assemblies used across a wide span of TPE331 engine models. It is the source text a technician needs when a manifold or nozzle must be stripped, cleaned, dimensionally inspected, repaired, reassembled, torque-checked, flow-tested and returned to service, and it includes the Illustrated Parts List (IPL) with exploded views and a numerical index for the parts that live inside those assemblies.

The manual opens with Description and Operation, which explains how the primary nozzles handle starting and initial acceleration and how the secondary nozzles then join in as fuel demand rises. It describes the flexible manifold construction — hoses shrouded with fuel and oil resistant silicone rubber impregnated asbestos sleeving — and walks through the internal fuel path through the distributor, swirl chamber and orifice. From there the Disassembly chapter lays out the separate procedures for primary and secondary assemblies, and because the two assemblies have different flow rates and spray patterns the manual repeatedly insists that primary and secondary parts must never be intermingled.

Cleaning is covered in real depth, including soak-tank and ultrasonic carbon removal procedures with rust stripper solution, nitric acid dip guidelines, isopropyl alcohol water displacement, and a dedicated baking procedure for the fuel nozzle body. Inspection/Check then provides the acceptance criteria for the manifold hose insulation, brazed joints on the nozzle housing, the conical mating surface, marker band legibility, the spring free length and test load, the screen, the distributor face and slots, and the nozzle body threads. Fluorescent penetrant inspection procedures for crack detection are written out step by step with dwell times, rinse pressure limits, drying temperature and black-light intensity. Repair covers hose insulation sleeve replacement, retainer and distributor discoloration removal, and blending of nicks and scratches on the nozzle body with Arkansas stone and crocus cloth.

Assembly is where the torque values concentrate. The manual lists the B-nut torque windows for each code group, the nozzle-to-housing torque values, the shroud torque and re-torque sequence, and the key washer tab-bending and shroud-lock alignment checks. Pressure tests up to 800 psig, leakage checks at 250 psig and 400 psig using MIL-C-7024 Type II fluid, and nozzle-to-shroud clearance checks with a 0.008 inch wire gauge are all spelled out. Testing gives the nozzle flow limits and spray angle requirements for both primary and secondary nozzles, shows the acceptable cone patterns against the unsatisfactory patterns, and provides the assembly flow rate and percentage differential limits for each manifold code family.

Rounding out the manual are Fits and Clearances references, Trouble Shooting direction, Storage Instructions with barrier material and desiccant packing, a Special Tools, Fixtures and Equipment chapter listing the ring installing holder, gage, crimping tool, holding fixtures, drill fixture and test stands with their part numbers, and an Illustrated Parts List with exploded views and a numerical index covering every procurable part in the assembly.

Coverage

The Garrett TPE331 Fuel Manifold & Nozzle Assembly Overhaul Manual 73-10-16 covers the fuel manifold and nozzle assemblies identified by part numbers 868914-X, 869544-X, 893468-X, 893469-X, 3101592-X, 3102111-X, 3102473-X, 3102474-X and 3102475-X. Effectivity codes AA through LD split the procedures so a technician works from the correct disassembly, cleaning, inspection, assembly and test steps for the specific assembly in hand. Engine models appearing in the effectivity tables include TPE331-25AA, -25AB, -25DA, -25DB, -25FA, -43A, -43BL, -47A, -55B, -1-151A, -1-151G, -1-151K, -2-201A, -1-100F, -1-101B, -1-101E, -1-101F, -1-101Z, -2-201C, -2UA-203D, -3U-303G, -3U-303V, -3UW-303G, -3U-304G, -5-251C, -5-251K, -5-252D, -5-252K, -5-254K, -5-255K, -5A-252D, -5-252M, -6-251M, -6-252B, -6-252M, -6-252L, -6-252T, -6-253B, -6A-251M, -6A-252M, -8-401S/-404S, -10-501C, -10-501K, -10-501M, -10R-501C/-502C, -10U-501G/-502G, -10U-503G, -10UA-501G, -10UF-501H, -11U-601G and -11U-602G. Aircraft applications listed include the Mitsubishi MU-2 series, Fairchild Porter PC-6/C-H2, Turbo Commander 680T/680V and 680W/681, Jetprop Commander 690/690A/690B/690C/690D and 695/695A, Merlin IIB/III/IIIA/IV/IVA/IIIB/IIIC/IVC, Metro/Metro II/Metro III/Metro IIIA, CASA 212-100 and 212-200, Dornier 228, Beech B100, Conquest II, Jetstream 31, Skyvan, Goose, Turbo 18, Jetliner 600 (Dove), Pilatus Porter, Peacemaker, S2R Turbo Thrush/Turbo Ag Cat and Helitec Corp S55T.

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Why This Manual Matters

A fuel manifold and nozzle assembly overhaul is unforgiving work. Nozzle flow rates and spray patterns are matched to the engine, the primary and secondary parts are not interchangeable, and a manifold that leaks at 800 psig or a nozzle that sprays a solid stream instead of a cone will not pass test. The Garrett TPE331 Fuel Manifold & Nozzle Assembly Overhaul Manual 73-10-16 gives the exact torque values, cleaning sequences, fluorescent penetrant procedure, dimensional acceptance limits, spray angle and flow rate figures, and test pressures that separate a serviceable assembly from one that has to be rejected or reworked. Whether the job is replacing a damaged insulation sleeve, reworking a shroud pin hole, checking a distributor under 10 power magnification, or running the final flow test against the percentage differential limits in Table 703, the procedure is here.

Instant PDF Delivery

This Garrett TPE331 Fuel Manifold & Nozzle Assembly Overhaul Manual 73-10-16 is delivered as an instant PDF download. No shipping, no waiting for a paper copy to arrive, no risk of a missing page in a used binder. Open it on a laptop, tablet or phone in the shop, search the Illustrated Parts List for the part number you need, and print the pages you want to keep at the bench. One purchase, immediate access, and a document you can return to every time a TPE331 fuel manifold or nozzle assembly comes across the work order.