TOFT 1 (dip Stuff) Flashcards
Reel And cable assembly (inside the cable railing machine)
- electrical interface between the ST/R and TA: Supports the weight of the TA +2250 feet of cable
- Cable assembly also has limit sensors (open when less than 5 to 8 cycles left), deep cycle counter
Cable reeling machine
-Driven by AC utility hyd system, control assembly meters pay out speed and direction of motor
Cable reeling machine emergencies
- Auxiliary electrical motor and auxiliary hydraulics control system also allow capability to raise lower TA in the event of hydraulic power loss
- Also there’s a cable cutter assembly for emergencies
As cable is paid out it:
Passes level wind mechanism, cable stress sensor, and through cable angle sensor
What does the cable angle sensor measure?
It measures the angle of the cable versus vertical (aircraft or water)when TA is deployed then it sends a signal to the AFCS and FDS
How many modes of operation does the cable reeling machine have?
It has six different modes, but think of them as degradation
Cable railing machine, automatic mode
- This is the normal mode
- normal mode has full capabilities and full safety features
-RMIU assumes aircraft at
70 foot hover height
-Seat =
RMIU readouts 0 feet pay out
-Trail =
6 feet below aircraft (10 feet of payout)
-At 20 feet above water,
RMIU triggers ST/R into ESD protect mode
-At approximately 28 feet,
RMIU detect SUBMRG and triggers exit ESD protect mode
With SUBMRG light
That’s displayed on RMCU and cable angle FD
BOTTOM =
Within 50 feet of floor
CBL LIM =
Eight wraps left on reel
Second normal mode is what?
Manual RMCU hydraulic
Auxiliary hydraulic mode
Bypasses RMCU/RMIU in the event of RMIU failure, allows manual manipulation of control service valve
- Needs hydraulic power and 28VDC electrical power
- No auto stops at Trail; no auto seat or locking of TA
- Finer raise/lowering; RSL limit speed to 6 ft./s one TA within 60 feet of aircraft
- Commonly used to correct miss wraps, reseat TA, and retrieving TA during fault/failure
Auxiliary electrical mode
- Auxiliary motor drives gear train assembly an event of hydraulic failure
- Motor receives 115 V AC, three phase, 400 Hz power
- For safety features; will stop at Trail, will seat/lock TA
- Raises at 8.2 ft./s, no Lowering capability
Auxiliary hardware electric mode
Generally same is auxiliary electric mode but bypasses all safety interlocks and no auto stopping
- Motor is controlled directly by RMCU , Bypassing RMIU electronics
- To enter, hold RMCU SAFETY OVERD + RMCU RAISE While in auxiliary electric mode
Hand crank mode
For maintenance only
List six types of cable reeling machine modes of operation
- Auto remote hydraulic mode -Normal
- Manual RMCU hydraulic mode-normal
- Auxiliary hydraulic mode
- Auxiliary electrical mode
- Auxiliary hardware electric mode
- Hand crank mode
What are the automatic functions of the reeling machine interface unit (RMIU)?
- BIT
- stop 8, snag, auto 2
- Stop at cable limits
- Stop at preselected depth
- Stop at Trail depth
- Stop at seat position
- Stop at kiting position
- Stop one excessive water exit speed
- Stop when TA is 50 feet from sea floor
- Stop if uplink data is lost
1.Snag sense and response
- Automatic selection of Raise/lowering speeds
- Auto mode and in “to trail” commands, folds array before rising
Reeling machine control unit does what?
- Controls the reeling machine functions and has failure indications
- auto: Preset death commands may be issued from menu, acknowledged, or canceled
- man: the SO Command steps changes
What are the functions of the transducer assembly?
Receive 3, provide 2, process 1
- Receives high power acoustic transmit pulse and WQC transmit signals from the ST/R via the sooner cable and transmit them into the water
- Receives in water active echo returns and WQC signals; provides front end processing; converts the signals to digital uplink data; and send it to the ST/R
- Receives in water wide band energy signals for acoustic signal analysis (ASA)by the AP
1.
What is the utility hydraulic system? Components?
It is independent of the rest of the aircraft hydraulic system. It is mounted on the right rear quarter of the main transmission, operating only when it turns. Also powered electrically buying on-off switch (over copilot, near lights)
Components include, hydraulic pump reservoir manifold, main transmission cooler, and it’s distribution system
What happens with the utility hydraulic system switch in the on position?
On -Bypass valve energize closed, pressure increase to 3000 psi for sono reeling operations
What happens with utility hydraulic system switch in off position?
Off - Operates continuously at reduced pressure of 1000 psi for recirculation and cooling
UTILITY HYD PUMP caution
UTILITY HYD PUMP HOT caution
UTILITY HYD PUMP RSVR LOW caution
*1. Stop dome
** caution: Utility hydraulic pump with low or no hydraulic fluid shall be secured to prevent damage to the pump
How do you engage cable angle hover?
It is engaged by pressing cable angle push fun on so no cable angle control panel
How do you disengage cable angle hover?
Automatically disengaged when dome is reeled up through 15 to 39 feet (27 +/- 12) water depth or when pilot pushes cable angle again
What conditions must be met prior to engaging cable angle hover mode?
+/-5 KGS,
altitude hold within 10 feet of selected altitude,
and dome wet indication
What do the ALFS cable angle sensor is measure?
It measures the angular displacement of the cable from the center of the funnel relative to the aircraft orientation
While the dome is submerged, it maintains perpendicular angle between cable and water which is the dead center of the cable angle display
What does the cable angle display reference?
It references the vertical angle relative to the water surface or verticality. To view, hit the ACST bezel key
- each tick equals 2°
- The inner ring equals 4.25°
- The outer ring equals 8.5°
CABLE ANGLE AT LIMIT alert
Potential cable damage, cable has exceeded 7.5°
Cable angle warning
If the 8.5 outer ring is reached while the dome is leaving the water, there is a significantly increased risk of the dome striking the aircraft including the aircraft rotor which may result in air crewman injury and/or death
Cable angle caution
If the 4.25 inner ring is exceeded as the dome is leaving the water during raise operations, there is an increased risk of the sonar dome striking the aircraft which may result in equipment damage
At what altitude shell dipping sooner operations be at?
70’AGL
Dipping sonar altitude caution
Deviation of aircraft hover altitude from 70 feet while transducer assembly is entering or exiting the water may result in damage to the dipping sooner equipment due to electro static discharge
Towing transducer limitations
8 KGS With array folded
4 KGS With array unfolded
Towing transducer caution
Exceeding 8 KGS with array folded or 4 KGS with the array unfolded may cause transducer assembly cable separation
What is the definition of towing?
Towing is defined as the cable contacting the funnel. Aircraft ground speed may be greater than 8KGS folded or 4KGS unfolded provided the cable is not in contact with the funnel
Air speed operating limitations with the dome
Dome at or above trail, cable extended 10 feet, dome at approximately 6 feet below aircraft is limited to 70 KIAS/45° angle of bank
Dome below trail is limited to 70 KIAS/15° angle of bank
How do you optimize cable angle hover?
-Establish a stable, non-drifting hover, as per Cicely into the wind as possible before lowering dome
When shall cable angle hover mode be engaged?
Cable angle hover mode shall be engaged by the pilot as soon as the dome submerged advisory is displayed on the FD.
Immediate engagement allows the a FCC to keep the cable somewhat center during the cable pay out
How long does it take the AFCS to calculate velocity biases?
AFCS takes the first 25 seconds to calculate lat and long velocity biases.
After this. The most effective way is by using the four way trim switch which applies 3KGS bias in each direction.
When the cyclic trim release button is pressed, it resets biases, reverts to the original velocity bias.
What does the dome automatically do in auto mode when finished with dissent?
It automatically unfolds
If after 25 seconds, the aircraft is still showing Erratic cable angle, consider
Folding the staves prior to taking further action
Sonar cable pay out caution
Sonar cable pay out with cable angle hover mowed once the dome submerged advisory is displayed, may result in aircraft drift and damage to the cable insulating jacket
If the cable is hard against the funnel and AFCS it’s not correcting, pilot respond as follows:
- Use cyclic trim to command aircraft
- Fly against the trim
- Using term release button caution re-position the aircraft
- Fly against longitudinal trim
**Once cable angle is re-entered, re-engage cable angle hold
RMCU failures:
- OVRROT
- LEAK
- HOT
- TILT
- KITING
- CAB LIM
- BOTTOM
- SNAG
- SLIP
- ERROR CODE
- OVRROT = Excessive rotation on the transducer
- LEAK =Transducer detected a week
- HOT = Excessive temperature in the transducer
- TILT = Transducer tilting greater than 10.5°
- KITING = Coding condition; when the cable pay out rate is greater than the transducer dissent right
- CAB LIM =Cable payout limit reached, eight wraps remaining
- BOTTOM = Transducer is within 50 feet from the ocean floor, not that it is on the floor. Bottom proximity detection is
7a. ACTIVE = TA folded and submerged sensor activated, and ST/R is on and uplink established
7b. INACTIVE = TA unfolded and no submerge on RMCU - SNAG = Too much cable tension; flashes
- SLIP = Reeling machine clutch slip
- ERROR CODE = Lights up when air code is being displayed
Dip to dip day VMC procedures (Voice reports)
- PAC - “Automatic approach checklist”
1a. PNAC - “ checklist complete” - PAC - “ commencing manual approach” Then after approach, fly the helicopter to a 70 foot hover.
NOTE 1: The PAC scan should be primarily outside. Do not decelerate below 50 KIAS Until within 90° of Wyne lined and do not design below 90 feet until into the wind. Do not uncouple the rotorhead with large reductions in collective during the maneuver. Maintain balance flight throughout the turn.
NOTE 2: Approaching the hover, scan down to the water to determine ground speed and monitor the RADALT to ensure the aircraft does not descend below 70 feet. Anticipate the greater power required as the aircraft to decelerates through translational lift
- PAC - Once helicopter reaches hover altitude and attitude with less than 5 KGS, RADALT hold will be engaged, call to engage hover coupler and report “engage hover mode”
3a. PNAC - Press approach/cover push button and report “engaged.” Announce light changes from approach to hover. Complete hover checks and report “hover mode, hover checks complete” - PAC - Establish a study couple hover at 70 feet and less than 4KGS, ensure cable angle is displayed in cockpit and initiate deployment of transducer. Report “steady hover, down dome”
Did they VMC procedures
- Fly directly to the FTP. Initiate or review automatic approach checklist as appropriate
- If heading nearly into the wind, adjust heading at 0.6 NM or 1200 yards toward gate position.
For all other headings offset heading a minimum of 30° toward down win at 0.6 NM or 1200 yards.
PAC maybe get into decelerate prior to reaching 1200 yards as necessary - At the initiation of manual approach report “commencing manual approach”, maneuver is required to arrive at the gate position
- Maneuver as required to arrive at the gate position, aircraft into wind, wings level, FTP on nose, approximately 0.3 NM or 600 yards away, and fly the helicopter to a 70 foot hover
DEF to dip night/IMC upwind approach
- Fly directly to the FTP, initiate a review automatic approach checklist as appropriate
- Decelerate at 1.5 NM or 3000 yards
- Maneuver as required to arrive at the gated position
- At gate: position aircraft into wind, wings level, FTP on nose, approximately 0.5 NM or 1000 yards, initiate automatic approach “engage approach”
Dip to dip night/IMC downwind approach
TURN, WAIT, SLOWDOWN
- Fly directly to the FTP. Initiate or review automatic approach checklist as appropriate
- At approximately 1.5 NM or 3000 yards, commence a minimum 30° heading change toward the downwind side of the FTP
- After passing the closest point of approach or CPA, Indicated by the range to the FTP beginning to increase begin to decelerate to 80 to 90 KIAS
- Turn back into the wind and very angle bank to roll out at the gate position
- At gate position, aircraft into wind, wings level, FTP on nose, approximately 0.5 NM or 1000 yards initiate automatic approach “engage approach”
Dip to dip night/IMC crosswind approach
XW = COMBINED
- Fly directly to the FTP initiate or review automatic a perch checklist as appropriate
- At approximately 1.5 nm or 3000 yards, commence a SRT to a downward heading while simultaneously slowing down to 80 to 90 KIAS
- After passing the CPA at approximately 2000 yards with wings level, begin to turn back into the wind and very angle of bank to roll out at the gate position
- At gate position, aircraft into wind, wings level, FTP on nose, at approximately 0.5 nm or 1000 yards initiate automatic approach “engage approach”
Dip to dip night/IMC voice reports
- PAC - “ automatic approach checklist”
1a. PNAC - “Checklist complete” - PAC - Upon reaching desired gait position in enter wind +/-5° angle of bank, initiate the approach “engage approach”
2a. PNAC - press APPR/HVR push button; “Approach engaged”
2b. PNAC - No when aircraft finishes the automatic approach and approach button changes to hover mode then complete hover checks; “hover mode hover check complete” - Everybody - Continue as specified for a dipping sonar day/VMC approach number eight
3a. PAC - “Steady hover, down dome”
Free stream recovery warnings
W1: During I am C or night with no visible horizon, free stream recovery should not be attempted. Sonar cable cut EP should be initiated
W2: Following free stream recovery, if cable oscillations become too great and cannot be controlled or studied, execute sonar cable cut EP. If possible, lower the dome onto the beach or in to shallow water and cut the cable
Free stream recovery procedures
Read through entire checklist prior to beginning
- PAC - “Standby for free stream”
- SO - Cease lowering, check reeling machine stopped; “dome stopped. Depth XXX feet”
- So- Fold array; “array folded”
- PAC - Commence vertical climb at 100 to 300 ft./min.; “commencing free stream”
- PNAC - Press cable and go push button to disengage cable angle hover mode; “off cable angle”
5AP. Monitor engine and fight instruments. Warn other aircraft to remain well clear - SO - Observed depth/cable out display and report passing 100 feet levels and report when sonar submerged light is extinguished; “dome clear”
- PAC - Ensure auto depart push button on cyclic is depressed two times to disengage the AFCS coupled hover. Adjust airspeed to maintain cable off the funnel. With dome below trail, maintain less than 70 KIAS and less than 15° angle a bank
***If able to raise, proceed. If unable to raise dome, report “hung dome” and initiate hung dome recovery procedures
- PAC - Initiate recovery with the command; “up dome”
- SO - Visually check cable not in contact with funnel and commence raising the dome; “up dome”
- SO -Monitor cable position. If oscillations become excessive, stop raising an attempt to dampen oscillations
10a. PAC - If excessive oscillations continue, perform sooner cable cut EP - SO - When Dam reaches trail, report “dome at trail”
- SO - Seat dome; “dome seated”
Sonar cable cut emergency procedure
- 1 caution
- 2 notes
- 1 warning
- Non-memory procedure
- Caution: Pressing the cyclic emergency release push button with sonar arming armed, cargo hook control armed, rescue hoist power/armed armed, and the rast master on will fire the respective CADs
- note 1: Pulling right hand rack circuit breakers will result in loss of acoustic and MTS systems
- Note 2: Presence of a steady 1177 RMCU error code could indicate a loss of TA or severed sonar cable
- warning: The cable cutter initiator is a pyrotechnic device capable of causing serious injury. And share personnel are clear of the reeling machine at home advisor down before actuating the emergency release
Cable angle lat/long fail advisories
- Illumination of either legend lat-long indicates a failure in that axis. The field access reverts from cable angle hover to hover mode. The remaining axis is fully functional. Press to reset.
- note: If the Failed axis cannot be reset and the pilot must manually control the aircraft in that access. If both axes failed the aircraft reverts to normal hover mode and the lat vel and long vel potentiometers are active. Continued dipping operations are not recommended
All dipping operation shall include a
Thorough review of the environment, water depth, and include an ORM/CRM review
When shall the automatic approach Checklist be completed?
Prior to descending below 150 feet AGL
Before the first flight of the day an ALFS equipped aircraft,
The HAC shall ensure the “dome seated” advisory is present before taxiing.
If dipping operations are to be performed, the air crewman shall complete and MBIT prior to commencing any dipping operations.
Preoperational MBITs should be conducted on the ground to the maximum extent practical
The ALFS shall only be pinged with
Approval of the CEO and with prior FACSFAC coordination
Furthermore the HAC shall a adhere to the current marine mammal mitigation procedures and Atlantic fleet active sonar training environment impact statement. A sonar positional reporting system (sports) report shall be completed it the sooner was utilized underwater.
In air pings are authorized
Actual dipping operations shall be conducted only
On schedule dipping events unless otherwise approved by the CO
Dipping operation shall be limited to a maximum depth of
50 feet within 70 NM of the NRB TACAN
The shallow water dipping area is located between?
NRB TACAN and 100 to 120 radios from 25 to 30 NM
Normally, dipping operations are conducted in the shallow dip area when
The aircraft is conducting an ALFS post install dip cycle or ALFS FCF dip cycle
Syllabus dipping events should be
Scheduled in deep water dip area
The deep water dip area is located
In 26 G Working area of warning-158E excluding submarine transit Lane N-1. The 100 fathom curve is approximately 75NM east of Mayport
Eric crew shall check the wave height at
Fernandina offshore weather Bowie station 41112 prior to launching on a shallow water dipping event to assist in making appropriate risk decisions
A maximum wave height of is allowed during dipping operations in shallow vs deep?
A maximum wave height of 5 feet is permissible when operating in the shallow dip area
Maximum wave height for operations in 26G shall be in accordance with reference D
