CFM Engine Oil Consumption Limitations

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CFM Engine Oil Consumption Limitations

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CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, September 2002 WTT face to face or Export are Prohibited
Engine Oil Consumption Limitations
James Eadie
Boeing – Propulsion Systems Division
CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, September 2002 WTT face to face or Export are Prohibited
Engine Oil Consumption Limitations
 Background
 Previous engine oil consumption limitations were common for all
737 minor models.
– Commercial 737NG oil consumption limited to 0.25 gallons per hour.
– 737 Boeing Business Jets limited to 0.22 gallons per hour
– Limitation contained in AMM section 71-00-00
 The FAA has changed position on engine oil consumption limitations.
– Required limitation in Section 9 of the Maintenance Planning
Document during certification of new minor models.
 737-900
 737-800 w/ winglets
– The FAA has indicated they may initiate an AD to require coverage of
all models in the MPD.
CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, September 2002 WTT face to face or Export are Prohibited
Engine Oil Consumption Limitations
No 9 0.22
737-900 No 0 0.34
Yes 0 0.31
737-800 No 0 0.33
Yes 9 0.22
737-700BBJ
737-700, -700C No 0 0.30
737-600 No 0 0.29
Oil Endurance
(gal/hours)
Number of
Auxiliary Tanks
Winglet
Equipped
737 Minor Model
 Revised Oil Consumptions Limitations
 FAA has approved revised oil consumption limitations for the 737
– Minor model unique oil consumption limitations provide increased
consumption limits for non-BBJ airplanes.
CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, September 2002 WTT face to face or Export are Prohibited
Engine Oil Consumption Limitations
 Boeing Publication Changes
 Airplane Maintenance Manual Revision.
– Revised minor-model specific oil consumption limitations will be
published in AMM section 71-00-00
– Scheduled for October 2002 revision
 Maintenance Planning Document Revision
– Revised MPD Section 9 text will allow use of minor-model specific
limits for 737-900 model & 737-800 model with winglets.
– Scheduled for October 2002 revision