S 716-088-C00
(3)
If the seal or the shroud rubs but is serviceable, the engine can be used if a Power Assurance Test (AMM 71-00-00/501) is satisfactory.
S 216-107-C00
(4)
After the test, examine these components for signs of bearing damage, and if found, removed and disassemble the engine (AMM 71-00-02/401):
(a) Magnetic chip detectors (AMM 79-21-05/201).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
72-00-00
ALL ú ú C01 Page 682Q ú Mar 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
Engine Operations Above the Limits and High Engine Stress Inspection
_____________________________________________________________________
(b) Filter element for the scavenge oil filter (AMM 79-21-04/401).
P. Engine Acceleration Not Within Limits from Test No. 8 Accel/Decel Check (AMM 71-00-00/501).
S 216-097-C00
(1) Engine acceleration time is more than 7.4 seconds after all troubleshooting is done.
(a)
You must remove the engine (AMM 71-00-02/401).
(b)
One non-revenue flight is permitted before you must remove the engine.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
72-00-00
ALL ú ú C01 Page 682R ú Mar 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
Volcanic Ash, Dust Or Sand Ingestion Inspection
_______________________________________________
TASK 72-00-00-206-126-C00
17. Volcanic Ash, Dust Or Sand Ingestion Inspection
_______________________________________________
A. General
(1) This procedure contains the volcanic ash, dust or sand ingestion inspection.
(2) Do this inspection on engines that have flown through, operated in, ú or been exposed to volcanic ash, severe dust or severe sand ú conditions.
B. References
(1)
AMM 12-13-11/301, Engine Oil
(2)
AMM 72-00-00/601, Engine
(3)
AMM 79-21-04/401, Scavenge Oil Filter Element
C. Access
(1) Location zones
506 No. 1 Engine
606 No. 2 Engine
D. Procedure.
S 216-151-C00
(1) Do the steps that follow for engines that have flown through or ú operated in volcanic ash, severe dust or severe sand conditions: ú ú NOTE:____Some aircraft are operated in normally sandy or dusty ú conditions (e.g. deserts, unimproved runways) without adverse ú affect on the engines. This inspection is for severe dust or ú sand conditions that are more than normal. ú
(a)
Visually examine the engine inlet and exhaust areas for indications of damage or erosion that is more than the permitted limits.
(b)
Do a borescope inspection procedure of the HPC and HPT (AMM 72-00-00/601) and look for this damage:
NOTE:____Make sure you inspect all stages of the HPC. The aft stages of the HPC are most easily damaged by volcanic ash, dust or sand erosion.
NOTE: Make sure you inspect the HPT nozzle vanes and HPT
____ blades for erosion and accumulation of solidified materials. Sufficient quantities of material accumulation on the HPT nozzle vanes can cause a reduced engine stall margin.
1) Erosion that is more than the limits. 2) Foreign object damage (FOD).
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ALL ú ú C02.1 Page 682S ú Jul 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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