Blade Fold Wing Stow Flashcards
In case of hydraulic pressure loss or a sequence time out occurs, select __________ after determining there are no other faults and continue task.
retry
The rotor positioning unit is a/an __________ controlled rotary drive unit.
Electrohydraulic
The rotor positioning unit is mounted to the __________.
MWGB
The blade fold control unit is mounted on the __________.
Central De-ice Distributor
The un-commanded rotation is not electrically controlled and can only be stopped by removing__________.
No. 3 Hydraulic pressure
If a BFWS fault OID is displayed, do not select override until the problem __________.
Is determined
Prior to releasing the BFWS switch, what must you observe on the MFD?
Sequence complete.
How many Wing Lockpin cat’s eyes are on the CV-22?
4.
Engaging the wing lockpins will cause bearing damage due to increased forward CG load in which position?
Airplane Mode.
What type of inspection is due on the BFWS system after 5, 10, 25, 100, 500, 1000 Cycles?
Adjust Wing Stow Cable Tension.
Upon completion of a wing stow, what must the maintainer do?
Verify the cat eyes.
The components of the Blade Fold System consist of the __________ and the __________.
Rotor Positioning Unit/Blade Fold Control Unit.
Hydraulic power for capstan drive and lock pin actuation is provided by the __________ system and controlled by __________ through utility ________
No. 3 utility Hydraulic System/Flight Control Computer No. 3/Isolation valve
What degree azimuth angle, measured about the wing centerline, does the rotor positioning unit position the red blade for Blade Fold/Wing Stow?
7 Degrees.
What major component of the wing stow system provides force to the cable assemblies to cause the flex ring to rotate?
Capstan drive.
The BFWS system shall not be operated in winds greater than __________.
45 Knots
__________ are incorporated to prevent in-flight coupling and locking of the R.P.U.
Interlocks
The wing interface unit is a related component to the BFWS system. It provides the __________/__________ between the __________ and the advanced mission computer.
Electronic Command/Status/Wing Stow Control Module.
The BFCU controls and sequences the operation of the blade fold assembly by responding to the signals from the __________, by responding to inputs from the __________ __________ and by controlling the __________.
Mission Computer/status interface/stow control module.
What three things must you have before wing stow is available?
Weight on wheels, ECL’s at off, RPM at 0.
There are __________ blade latch sensors, __________ blade fold sensors, and __________ pitch lock pin sensor(s) per hub.
6/2/1.
What determines and continuously monitors the current configuration of the proprotors, nacelles, flaperons, and wing during Blade Fold/Wing Stow operations?
Advanced Mission Computer.
There are __________ shear pin monitors per hub. They are a __________ device that is mounted on the planetary assembly. The shear pin monitor senses __________ and __________ the blade actuator assembly.
six/Electromechanical/System Jam/Prevents Overloading.
Uncommanded wing rotation may occur when the BFWS switch is released. The uncommanded rotation is not electronically controlled, and can only be stopped by __________ from the aircraft. If uncommanded wing rotation occurs, remove __________ immediately. Failure to comply may result in aircraft damage or personnel injury.
removing system 3 hydraulic power/system 3 hydraulic power
What must you observe prior to converting the nacelles to horizontal with the thumbwheel?
Blades are in inverted Y.
When a halt occurs, the step will either be ________ or ________. A ________ halt detects failure modes during wing and nacelle movement when major AC damage may occur.
red/yellow/red
It is permissible to operate the BFWS system while the aircraft is on jacks.
FALSE.
During BFWS the rotor brake should be in the __________ position.
off
The Wing Stow system operates on 28 VDC supplied from DC bus __________ electrical systems?
3
Which hydraulic system provides 5000 PSI for indexing and stowing during BFWS?
System 3.
During BFWS the turret mounted wing can be rotated
90 degrees
During the BFWS process you get a system halt, what should you do?
Get a qualified person designated by the unit to troubleshoot the system.
Hydraulic power for the capstan drive and lock pin actuation is provided by the ________ system and controlled by ________ through utility _______.
No. 3 hydraulic/Flight control computer No. 3/Isolation valve
Whenever the wing flight ready switch is failed and the wing angle is less than _______, JASS software will incorrectly assume the wing is in ________.
57 degrees/flight ready.
What is the purpose of ERAC 36?
Provide procedural steps required to avoid an/or correct the undefined state status at blade fold.
If the AMC does not receive all four lock pin signals within ________ a ________ message is displayed on the CDU.
5 seconds/BFWS halt
What caution do you get if you have BFWS alert?
BFWS NOT FLIGHT READY
When performing blade fold wing stow operations and the nacelles have not completely lowered by the time the wing reaches ________ a switch interrupts rotation of the wing by halting the capstan drive.
57 degrees
The purpose of ERAC 234 is to prevent damage to the________.
spherical bearing
The purpose of ERAC 224 is to provide a ________.
Warning before any powered wing stow/unstow
The warning/caution added to the IETM for inspecting the PRGB lockout tool prior to converting nacelles comes from which of the following?
ERAC 255.
“Caution: Ensure PRGB lockout tool is not installed prior to converting nacelles. Failure to comply will result in severe damage to the ________.”
Drive train
The wing stow isolation valve controls what?
Lockpin control module and wing control module.
After a full stow, you release the BFWS button what is displayed on the MFD?
Full Stow
What is the purpose of the extend lock release lever?
Retract the lockpin.
What switches notify of the wing position?
Azimuth.
