(a) On panel 110VU:
- Set the parking brake control switch to ON.
(b) Release the brake pedals.
(9) Calculate what follows:
(a) Multiply the amplitude of the vibration by 150 g.cm/mils. Example: 2.1 x 150 = 315 g.cm.
(10) Determine the correction angle by subtracting the vibration angle from 200 degrees. Example: 200 - 250 = - 50 = 310 degrees.
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Ground Vibration Recording - Example
Figure 532/TASK 71-00-00-991-361
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(11) Add the screw(s) best fitting the weight to be installed.
Example: 315 g.cm at 310 degrees corresponds to a P04 screw in
position No. 6.
(12) If a screw is already installed in this position, install a screw
whose weight is nearest to the sum of the two screws.
Example: One P01 screw in position No. 6 = 84 g.cm
+ One P04 screw in position No. 6 = 314 g.cm are equivalent to one P05 screw in position No. 6 = 378 g.cm
(13) Install the determined screw(s) in the required position(s).
(14) Before N1 is more than or equal to 75 percent, do this procedure:
CAUTION : DO NOT OPEN LGCIU CIRCUIT BREAKERS 1GA, 2GA, AND 52GA. IF
_______ YOU DO THIS, AIRCRAFT BRAKING THROUGH BRAKE PEDALS DOES NOT OPERATE.
(a) On the landing gear control and indicating panel 402VU:
- Make sure that the A/SKID & N/WSTRG selector switch 5GG is ON.
(b) Push and Hold the brake pedals at the full limit position.
(c) On the RUD TRIM/PARKING BRK panel 110VU:
- Set the PARKING BRAKE control switch to OFF.
(15) Start the two engines and let them become stable at minimum idle for 5 minutes (Ref. TASK 71-00-00-710-003)
(16) Slowly increase power of the non tested engine to 60 percent N1.
(17) Increase power of the tested engine to 80 percent N1, let the engine become stable for 5 minutes for engine warm up.
(18) Accelerate the engine to T/O N1 and make sure that the vibrations are in the limits before the flight.
(19) Program the EVMU to acquire unbalance data during the next flight (Ref. TASK 77-32-34-860-042). Program these speeds: 64, 84, 88, 92 and 96 percent of N1 to permit a cold trim balance procedure after landing.
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________ Subtask 71-00-00-869-112
A. Make sure that the work area is clean and clear of tool(s) and other items.
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Abnormal Operation and Emergency Procedures
CAUTION : DO NOT PERMIT THE ENGINE TO BE OPERATED AT A TEMPERATURE ABOVE THE
_______ EGT LIMIT. ALSO DO NOT OPERATE THE ENGINE AGAIN AND AGAIN AT HIGH EGT LEVELS. DOING SO WILL CAUSE THE ENGINE TO DETERIORATE BEFORE THE USUAL TIME. WRITE HOT STARTS AND OVERTEMPERATURE CONDITIONS IN THE AIRCRAFT LOG.
1. Reason for the Job
__________________
These procedures show conditions that can be found during engine operation and the emergency action that must be taken to stop the abnormal condition. To correct the cause of the abnormal condition refer to Trouble Shooting Manual.
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
29-10-00-710-001 Operational Check of Hydraulic Fire Shut Off Valves
and Associated Indicating System 71-00-00-710-001 Dry Motoring Check 71-00-00-710-002 Wet Motoring Check 71-00-00-710-003 Engine Automatic Start 71-00-00-710-028 Engine Shutdown 72-00-00-200-007 Procedure After Engine Fire or Use of
Fire-Extinguishing Agents 72-00-00-200-008 Inspection/Check After the Engine has Exceeded the Operational Limits 71-00-00-991-309 Fig. 506
3. Job Set-up
__________
Subtask 71-00-00-869-125
A. Not Applicable
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