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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
Volcanic Ash, Dust Or Sand Ingestion Inspection
_______________________________________________
3) Ash, dust or sand particles that have solidified on the HPT
nozzle vanes and HPT blades.
a) If material has solidified on the HPT nozzle vanes or
HPT blades, contact CFMI for instructions and
recommended action.
S 216-152-C00
(2) Do the steps that follow for engines that have been exposed to
ú volcanic ash, severe dust or severe sand but have not flown through___
ú or operated in these conditions:
CAUTION: DO NOT WATER WASH AN ENGINE THAT HAS BEEN EXPOSED TO_______
VOLCANIC ASH, DUST OR SAND. PARTICLES CAN ACCUMULATE IN
THE HPT NOZZLE AND BLADE COOLING PATHS. MATERIAL MAY
ACCUMULATE IN ROTOR SPOOLS AND CAUSE ROTOR IMBALANCE.
(a) Do an inspection of the engine inlet and exhaust for
accumulation of ash, dust or sand.
1) Use a vacuum to remove ash, dust or sand from accessible
areas in the engine inlet and exhaust.
2) Dry motor the engine for two minutes (AMM 71-00-00/201).
3) Do a borescope inspection of the HPC and HPT at the 6
o'clock position (AMM 72-00-00/601). Look for ash, dust or
sand.
4) If loose material is still present in the engine flow path,
dry motor the engine again for two minutes
(AMM 71-00-00/201).
5) Repeat the borescope inspection and dry motor procedures
until all the ash, dust or sand has been removed.
S 966-090-C00
(3) Replace the items that follow:
(a) Replace the scavenge oil filter (AMM 79-21-04/401).
(b) Drain and replace the oil (AMM 12-13-11/301).
S 716-091-C00
(4) Monitor the operation of the engine to find if the performance
parameters are unusual.
NOTE: It is recommended to do a one-time repeat borescope____
inspection of the HPT nozzle and HPT blades at the A-check or
after 400-800 cycles.
(a) If the parameters are unusual, refer to the troubleshooting
procedures.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
72-00-00
ALL ú ú C01.1 Page 682T ú Jul 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
Put the Airplane Back To Its Usual Condition
____________________________________________
TASK 72-00-00-846-047-C00
18. Put the Airplane Back To Its Usual Condition
____________________________________________
A. References
(1)
AMM 71-11-02/201, Fan Cowl Panels
(2)
AMM 72-00-00/201, Engine
(3)
AMM 78-31-00/201, Thrust Reverser System
B. Procedure
S 986-098-C00
WARNING: THE HANDCRANK COVER MUST BE INSTALLED ON THE N2 ROTATION PAD ON
_______ THE ACCESSORY GEARBOX. IF THE COVER IS NOT CORRECTLY INSTALLED OR IS MISSING, ENGINE OIL LEAKAGE CAN OCCUR WHICH CAN CAUSE ENGINE FAILURE. INJURY TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
(1) If you turned the N2 rotor, install the handcrank cover on the accessory gearbox (AMM 72-00-00/201).
S 416-064-C00
WARNING: OBEY THE INSTRUCTIONS IN THE PROCEDURE TO CLOSE THE THRUST
_______ REVERSER. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURY TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
(2)
If not done already, close the right and left thrust reversers (AMM 78-31-00/201).
S 416-065-C00
(3)
If not done already, close the right and left fan cowl panels (AMM 71-11-02/201).
S 446-094-C00
(4)
Do the activation procedure for the thrust reverser
(AMM 78-31-00/201).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
72-00-00
ALL ú ú C01 Page 682U ú Mar 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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