TM 10-7310-281-13&P
MODERN BURNER UNIT (MBU)
0009 00
TROUBLESHOOTING PROCEDURES
0009 00-3
THIS PROCEDURE COVERS:
MBU operates poorly
INITIAL SETUP:
Maintenance Level
Materials/Parts
Operator
None
CORRECT FUEL (JP-8) IN TANK? IS FUEL TAKEN
FROM CLEAN SOURCE?
No
DRAIN FUEL TANK COMPLETELY IAW WP 0010
AND REFILL AS IN WP 0005 OF 10-7310-281-
13&P. START UP IAW WP 0005 OF TM.
HAVE FUEL AND AIR FILTERS BEEN CHANGED
AT PRESCRIBED INTERVAL? IS FUEL NOZZLE
CLEAN?
No
PERFORM PERIODIC SERVICES IAW WP 0012
AND ATTEMPT STARTUP IAW WP 0005 OF TM
ARE AIR VENTS ON FUEL REGULATOR
ASSEMBLY AND VENT VALVE ASSEMBLY
CLEAN? ARE ASSEMBLIES PROPERLY
SEATED?
PERFORM ONLY THE CALIBRATION
PROCEDURE AS OUTLINED IN 0023 00-5. IF
MBU BURNER OUTPUT STILL DOES NOT VARY
SMOOTHLY, AFTER PERFORMING
CALIBRATION PROCEDURE, REPLACE
FEEDBACK POTENTIOMETER AS DETAILED IN
0023 00-5.
Yes
No
Yes
PROCEED WITH OPERATION
STILL OPERATES POORLY
STILL OPERATES POORLY
Yes
Yes
STILL OPERATES POORLY
DOES MBU OPERATE NORMALLY?
No
IF MBU CONTINUES TO OPERATE POORLY,
REFER IT TO UNIT MAINTENANCE
No
CLEAN AIR VENTS. CHECK SEATING OF
ASSEMBLIES AND RE-INSTALL CORRECTLY.
INSTALL A NEW O-RING. STARTUP IAW WP
0005 OF TM
Yes
STILL OPERATES POORLY
DOES MBU BURNER OUTPUT VARY SMOOTHLY
FROM HIGH TO LOW SETTING?
