7 Weeks

MASL D141304

STUDENT LOAD: MIN: 4 MAX: 10

PREREQUISITES

1. Physical condition:

a. Normal color vision (20/20 with or without glasses)

b. Normal color vision

c. Normal hearing

d. Normal manual dexterity

2. Entrance examination:

a. General aptitude - minimum raw score of 20

b. Mechanical aptitude - minimum raw score of 20

3. Open to staff sergeants through chief master sergeants and those maintenance officers being assigned to the UH-1 maintenance activity.

4. Completed as a minimum, the Basic Helicopter Crew Chief Course (MASL D141257) with one-year practical experience on the UH-1 or two years of practical experience on the UH-1 helicopter.

5. Uniforms: Students are required to bring utility, battle dress or equivalent.

COURSE OBJECTIVE

This course was designed to provide the helicopter crew chief with a higher degree of training on the UH-1 airframe and systems with emphasis on those tasks which relate to the maintenance supervisor such as safety awareness in the work center and troubleshooting of most common helicopter anomalies, overhaul techniques of main components, engine adjustments, flight control rigging and an in-depth study of helicopter vibrations and how to alleviate with usage of the strobex/vibrex equipment.

SPECIALITY DESCRIPTION

a. FUNDAMENTALS. Have knowledge of theory of flight, engine operating principal, use of technical manuals, and use care of tools (special and common).

b. PERFORM INSPECTION AND PREVENTIVE MAINTENANCE ON THE UH-1 HELICOPTER AND RELATED SYSTEMS. Perform inspections on the UH-1 helicopter structure, rotor assemblies, transmission, landing gear, engines, flight controls, and electrical and fuel systems.

c. REPAIR, MAINTAIN, AND SERVICE HELLICOPTER AND RELATED SYSTEMS. Remove and reinstall items such as rotor hubs, rotor blades, gearboxes, drive shaft, engines, and landing gear.

COURSE DESCRIPTION

BLOCK I - GENERAL FAMILIARIZATION (48 hours)

Course orientation and ground safety, airframe and landing gear inspection, landing gear cap adjustment and deflection check, flight control inspection and troubleshooting of flight control problems related to rigging, and flight rigging.

BLOCK II - T - 53-L-13 ENGINE AND RELATED COMPONENTS (52 hours)

Familiarization of T-53 engine and components, engine inspections and troubleshooting engine-related problems, engine compressor wash procedures, engine throttle rigging procedures, engine power control rigging, engine to transmission alignment procedures, and main drive shaft overhaul procedures.

BLOCK III - ROTORS AND DRIVE TRAIN SYSTEM (78 hours)

Main rotor hub assembly familiarization, inspection and overhaul procedures, main rotor hub disassembly and reassembly with emphasis on seal replacement and wear limitations, static balance of main and tail rotors, tail rotor familiarization inspection and overhaul of tail rotor hub, drive train system components and characteristics, drive shaft hanger bearing assembly overhaul, main transmission troubleshooting, 42 and 90 degree gearbox inspection, and removal and installation.

BLOCK IV - HELICOPTER VIBRATIONS ANS VIBREX SYSTEM (36 hours)

Helicopter vibrations and their characteristics, troubleshooting vibration, familiarization and installation of vibrex equipment, UH-1 vibrations and their effects on the airframe, familiarization of the 8500 vibration analyzer, and use of the whirligig simulator and vibrex charts for troubleshooting andeliminating vibrations.