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Helicopter

Helo maintenance/ vibe analysis

QuestionAnswer
T700-GE-401/-401C are what type of driven modular engines front-driven
The power turbine shaft, which has a rated speed of 20,900 rpm
Compressor aft borescope ports are at what station Compressor aft borescope ports are at what station
thermocouple ports/power turbine inlet is at what station 4.5
how many stations in the engine 5
type of compressor combined axial/centrifugal
number of compressor stages 6 stages: 5 axial and 1 centrifugal
type of combustion chamber single annular chamber with axial flow
no. 5 carbon seal, and no. 5 and no. 6 bearing support is located in exhaust frame
No. ___ and no. ___ bearings support the aft end of the PT shaft assembly; the forward end is supported by the ___ shaft 5, 6, output
the hot section module consists of three subassemblies: combustion liner stage 1 nozzle assembly, the gas generator turbine rotor, and a stator assembly which includes the stage 2 nozzle.
stage 1 nozzle assembly contains how many air-cooled nozzle segments 12
the accessory section module mounts on the ___ section module at the ___ o'clock position cold, 12
no. 1 and no. 2 main bearings located at A-Sump output shaft assembly
the combustion liner and the B-sump located at the midframe assembly
(-401) engines that have complied with ECP 700162 do not have ___ electrical control unit (ECU)
(-401) engines that have complied with ECP 700162 have a ___ digital electronic control (DEC)
When to accomplish output shaft balancing? High pitch whine audible in the engine/input module area. Vertical axis vibration level at 20,900 RPM exceeds .5 IPS during input module monitoring check
When to accomplish engine non-synchronous vib check? Following engine replacement. If engine de-swirl duct clamp cracks or breaks. Following occurrence of a sump leak (#1 Eng carbon seal replacement)
What is Non-Synchronous (NSV) Vibration Vibration that occurs in a component at some RPM other than the rotating RPM of the component
What is Axial Fan Health Monitoring ? A vibration check of the oil cooler blower can assembly and associated driveshafts accomplished using a ground run only. One accelerometer is used for the test and no tachometer installation is required
When to perform tail rotor balancing ? (1) Any time tail rotor assembly dynamic component dynamic components are removed and replaced (2) Tail rotor blade tip cap is removed or replaced. (3) When tail rotor rigging is performed (4) Post Phase, post IMP, post STEP, post ASLE
ATABS Optical Tachometer and Reflective Tape Installation for Main Rotor Tuning. What color is the Pitch Control Rod ? BLUE
ATABS Optical Tachometer and Reflective Tape Installation for Main Rotor Tuning. Where is the tachometer located? MAIN ROTOR
ATABS Optical Tachometer and Reflective Tape Installation for Main Rotor Tuning. What color is No. 1 blade? RED
ATABS Optical Tachometer and Reflective Tape Installation for Main Rotor Tuning. What color is No.2 blade? BLUE
ATABS Optical Tachometer and Reflective Tape Installation for Main Rotor Tuning. What is color of No. 3 blade? YELLOW
ATABS Optical Tachometer and Reflective Tape Installation for Main Rotor Tuning. What is color of No. 4 blade BLACK
what temp. should the engine be allowed to cool to before borescoping? 100 degrees Fahrenheit
borescope can be damaged if it comes in contact with parts hotter then what? 150 degrees Fahrenheit
what are the crack limits in the compressor section? there are none
how many borescope ports are there on the compressor? 3 ports
what position are the igniters in on the combustion section? 4th and 6th position
what's the function of the cyclic stick controls left, right, forward, and backward movement
whats the function of the collective controls vertical movement
purpose of the main gear box transfer power to the main rotor head
purpose of the tail gear box transfers power to the tail rotor
Created by: joe92