Inspection/Check of the Fuel Manifold Assembly [CFMB]

TASK 73-11-30-200-002-A
Inspection/Check of the Fuel Manifold Assembly

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.

ZONE: 400
FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 1M(3 FT)
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP8001)	lockwire 0.032 in (0.8 mm) dia.
(Material No.CP8002)	lockwire 0.032 in (0.8 mm) dia.

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 70-51-00-230-002-A	Fluorescent-Penetrant Inspection-Portable-Water Washable
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-B	Closing of the Fan Cowl Doors
TASK 73-11-40-000-002-A	Removal of the Fuel Nozzle for SAC Engines
TASK 73-11-40-000-002-A-01	Removal of the Fuel Nozzle for DAC Engines
TASK 73-11-40-400-002-A	Installation of the Fuel Nozzle for SAC Engines
TASK 73-11-40-400-002-A-01	Installation of the Fuel Nozzle for DAC Engines
TASK 78-30-00-081-041-B	Make the Thrust Reverser Serviceable after Maintenance
TASK 78-30-00-481-041-B	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-36-00-010-040-B	Opening of the Thrust Reverser Doors
TASK 78-36-00-410-040-B	Closing of the Thrust Reverser Doors
Fuel Nozzle Coupling Nut (Only Applicable for SAC Engines)
Spherical Seat Fitting Inspection Areas
Fuel Nozzle Coupling Nut (Only Applicable for DAC Engines)
Spray Shield Removal and Installation

3. Job Set-up
Subtask 73-11-30-941-051-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).

Subtask 73-11-30-010-052-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowls doors (Ref. AMM TASK 71-13-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL, 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL, 448AR.
(2) Put the ACCESS PLATFORM 1M(3 FT) in position.

Subtask 73-11-30-040-051-A ** ON A/C NOT FOR ALL

C. Make the thrust reverser unserviceable (Ref. AMM TASK 78-30-00-481-041).

Subtask 73-11-30-010-053-A ** ON A/C NOT FOR ALL

D. Open the thrust reverser doors (Ref. AMM TASK 78-36-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
451AL, 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL, 462AR.

4. Procedure
Subtask 73-11-30-230-051-A ** ON A/C NOT FOR ALL

A. When you do the visual inspection, if you find a crack or suspected crack in fuel manifolds or tubes, you have to do the FPI to confirm the crack (Ref. AMM TASK 70-51-00-230-002).

Subtask 73-11-30-210-051-A ** ON A/C NOT FOR ALL

B. Do a visual inspection of the items that follow:

INSPECT/CHECK	MAXIMUM SERVICEABLE LIMITS	REMARKS
1.Fuel manifold tubes for:
Cracks, splits or kinks.	Not serviceable.	Replace the engine.
Wrinkles in bends.	The depth must not be more than 3 percent of the nominal tube diameter or 1.52 mm (0.06 in.) deep whichever is smaller.	Replace the engine.
Dents.	No more than 2 in each linear foot, provided the depth is not more than 10 percent of the tube OD and the radius is not less than 2 times the thickness of the tube wall.	Replace the engine.
Flat areas.	Length must not be more than 2 times the tube OD, or the contour change must not be more than 10 percent of the tube OD.	Replace the engine.
Nicks, scratches, chafing or scores in the straight or bent sections.	0.005 in. (0.13 mm) maximum depth.	Replace the engine.
2.Tube coupling nuts for:
Damaged corners.	Any amount provided you can get the correct torque.	Replace the engine.
Damaged thread.	One half thread total or continuous not there.	Replace the engine.
Lockwire hole deformation and wear.	Permitted provided the metal around the hole is not cracked.	Replace the engine.
Lockwire hole torn open.	Permitted provided one hole for each coupling nut stays intact.	Replace the engine.
3.Fitting seating surfaces for: NOTE: Do this portion of the fuel manifold inspection if you think you have a leak, if you find damage after you remove a fuel nozzle, or if you see visual damage. NOTE: If not already done, disconnect the fuel supply tube from applicable fuel nozzle (Ref. AMM TASK 73-11-40-000-002) and (Ref. AMM TASK 73-11-40-400-002).
Circumferential and axial scratches in areas A and C.	Any amount 0.13 mm (0.005 in.) or less in depth after the removal of high metal.	Replace the engine.
Circumferential scratches in area B	Any amount that cannot be felt using a 1 mm (0.04 in.) radius ball scribe.	Replace the engine.
Axial scratches in area B.	Not serviceable.	Replace the engine.
Nicks and pits in area C.	Any amount less than 0.81 mm (0.032 in.) after blending.	Replace the engine.
Nicks and pits in areas A and B.	Not serviceable.	Replace the engine.
Circumferential score marks on the silver plated sealing (mating surfaces).	Any amount, provided that the score mark does not go through the parent metal.	Replace the engine.
Circumferential deformation (spreading) of the tube/ferrule or flare nut.	Any amount, provided that the nut turns freely.	Replace the engine.
Axial deformation (dishing) of the spherical seat fitting surface.	Any amount, provided that the depth is constant and is less than 0.13 mm (0.005 in.) normal to surface.	Replace the engine.
Post S/B 73-0112 4.Spray shields for:
Cracks and tears	Not serviceable	Replace the Spray shields as follows: Spray Shield Removal and Installation ** ON A/C NOT FOR ALL A.Spray Shield Removal: B.Remove the safety wire which holds the two Spray Shields 70 and 80 and/or 90 and 100. C.Remove the spray shields from the Fuel Manifold joints. D.Spray Shield Installation: E. Install the two Spray Shields 70 and 80 and/or 90 and 100. NOTE: Install spray shields 70 and 90 in inboard side with cup facing outboard. Install spray shield 80 and 100 in outboard side with cup facing inboard. WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE. F.Secure spray shields with safety wire CP8001lockwire 0.032 in (0.8 mm) dia. / CP8002lockwire 0.032 in (0.8 mm) dia..

5. Close-up
Subtask 73-11-30-410-052-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser doors (Ref. AMM TASK 78-36-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL, 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL, 462AR.

Subtask 73-11-30-440-051-A ** ON A/C NOT FOR ALL

B. Make the thrust reverser serviceable (Ref. AMM TASK 78-30-00-081-041).

Subtask 73-11-30-410-053-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL, 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL, 448AR.
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 02:57:49 UTC