Fuel Nozzle Leak Check
Figure 115 (Sheet 2)
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
OIL CIRCUIT AIR FLOW CHECK
1. EQUIPMENT AND MATERIALS
A. TEST RIG LOCAL PURCHASE
B. NO. 1 AND NO. 2 BRG SUPPORT TEST RIG ADAPTER 856A3267
2. TESTING PARAMETERS RELATED TO THE AIR FLOW RATE MEASUREMENT
A. AIR: CLEAN AND DRY
B. PRESSURE: 34.5 PSIA (237.8 kPa)
TEMPERATURE: 293.15`K=528` RANKIN (FOR INFO ONLY, =20`C=68`F)
STANDARD FLOW RATE:
* TEST RIG MUST BE SELECTED TO MEDIUM FLOW RESTRICTOR (5 mm DIAMETER) ** TEST RIG MUST BE SELECTED TO SMALL FLOW RESTRICTOR (3 mm DIAMETER)
FLOW RATE TABLE 1
NOTE:FLOW RATE RANGE SPECIFIED ABOVE MUST BE CORRECTED FOR DIRECT COMPARISON WITH INDICATED FLOW (IN PPH) USING THE FORMULA GIVEN IN TABLE 2.
NOTE:AFTER COMPLETION OF THE OIL CIRCUIT AIR FLOW CHECK, DO AN IDLE LEAK CHECK PER AMM 71-00-00, TEST NO. 3.
Engine Oil Circuit Air Flow Check
Figure 116 (Sheet 1)
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ú C02 Page 124
ú Mar 12/01
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F58667
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
W (CORRECTED) = W (MEASURED) X T (MEASURED) X____________ ____________34.5
WHERE: 293.15 P (MEASURED)
W (MEASURED) = AIR FLOW MEASURED (IN PPH OR KG/H ONLY) 293.15`K = REFERENCE TEMPERATURE FOR AIR FLOWS IN DEGREE KELVIN (`K) = 528` RANKIN (FOR INFO ONLY, NOT TO CORRECT W MEASURED, 293.15`K = 20`C=68`F)
T (MEASURED) = AIR TEMPERATURE SUPPLIED FOR CALIBRATION OR SENT INTO ENGINE PIPE FOR TEST IN DEGREE KELVIN OR RANKIN
34.5 = REFERENCE PRESSURE IN PSIA
P (MEASURED) = AIR PRESSURE SUPPLIED FOR CALIBRATION OR SENT INTO ENGINE PIPE FOR TEST IN PSIA
= IF AIR PRESSURE SUPPLIED IS MEASURED IN PSIG, SUM UP P AMBIANT AND P MEASURED, i-e: P MEASURED + P AMBIANT TO CORRECT W MEASURED
FORMULA FOR THE CALCULATION OF THE CORRECTION CYCLE TABLE 2
ENGINE SUMP
A
A. Pamb INDICATOR F. AIR SUPPLY CONTROL
B. Tamb INDICATOR G. AIR MEASURING CIRCUIT SYNOPTIC
C. P1 PRESSURE INDICATOR -1 SMALL SIZE PORT SELECTOR (3 mm DIA RESTRICTOR)
D. P2 PRESSURE INDICATOR -2 MEDIUM SIZE PORT SELECTOR (5 mm DIA RESTRICTOR)
E. AIR SUPPLY PRESSURE INDICATOR -3 LARGE SIZE PORT SELECTOR (12 mm DIA RESTRICTOR)
S-M56-MM-03392-00-B
Engine Oil Circuit Air Flow Check
Figure 116 (Sheet 2)
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F58671
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
3. REAR SUMP AIR FLOW TEST
A. ON THE TURBINE FRAME, AT 5 O'CLOCK AFT LOOKING FORWARD, REMOVE THE TUBE BRACKETS AND DISCONNECT THE TUBE COUPLING NUT FROM THE FRAME CONNECTION.
B. REMOVE THE HEAT SHIELD.
C. CONNECT THE TEST RIG AIR SUPPLY HOSE TO TUBE CONNECTOR INSIDE THE FRAME.
D. MEASURE THE AIR FLOW RATE.
E. DISCONNECT THE TEST RIG AIR SUPPLY HOSE.
F. CONNECT SUPPLY TUBE
(1)
TIGHTEN THE COUPLING NUT TO 238 POUND-INCHES (32 N.m)
G.
INSTALL BRACKETS AND HEAT SHIELD
(1)
TIGHTEN THE COUPLING NUT TO 53 POUND-INCHES (6 N.m)
TURBINE FRAME
SEE A
HEAT SHIELD FWD
OIL SUPPLY TUBE
BRACKETS TO REMOVE A S-M56-MM-03393-00-B
Engine Oil Circuit Air Flow Check
Figure 116 (Sheet 3)
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